AP Biology Unit 2, Ch. 6 - Pearson Questions
The diameter of a typical eukaryotic cell is approximately ten times the diameter of a typical prokaryote. What is the ratio of the volume of typical eukaryotic:prokaryotic cells? A: 10:1 B: 100:1 C: 1000:1
C: 1000:1
What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell? A: nucleus→ER→Golgi B: ER→Golgi→nucleus C: ER→Golgi→vesicles that fuse with plasma membrane D: ER→lysosomes→vesicles that fuse with plasma membrane E: Golgi→ER→lysosome
C: ER→Golgi→vesicles that fuse with plasma membrane
Which structure is not part of the endomembrane system? A: chloroplast B: nuclear envelope C: Golgi apparatus D: plasma membrane
C: Golgi apparatus
What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell? A: ER→lysosomes→vesicles that fuse with plasma membrane B: ER→Golgi→nucleus C: Golgi→ER→lysosome D: ER→Golgi→vesicles that fuse with plasma membrane
D: ER→Golgi→vesicles that fuse with plasma membrane
_____ aid in the coordination of the activities of adjacent animal cells. A: Plasmodesmata B: Desmosomes C: Tight junctions D: Gap (communicating) junctions E: Keratin fibers
D: Gap (communicating) junctions
Which of the following produces and modifies polysaccharides that will be secreted? A: peroxisome B: lysosome C: mitochondrion D: Golgi apparatus
D: Golgi apparatus
Which of the following functions is NOT associated with the cytoskeleton in eukaryotic cells? A: the beating of cilia or flagella B: the contraction of muscle cells in animals C: determining the shape of animal cells D: maintaining the position of the nucleus in the cell E: movement of RNA molecules from the nucleus to the cytoplasm
E: movement of RNA molecules from the nucleus to the cytoplasm
Which cell would be best for studying lysosomes? A: leaf cell of a plant B: bacterial cell C: nerve cell D: muscle cell E: phagocytic white blood cell
E: phagocytic white blood cell
True or false: Proteins produced during the "chase" phase of a pulse-chase experiment are labeled with radioactive material.
False
True or false?: Large proteins containing a nuclear localization signal (NLS) bind to the nuclear pore and enter the nucleus without any expenditure of energy.
False
Cyanide binds to at least one molecule involved in producing ATP. If a cell is exposed to cyanide, most of the cyanide will be found within the: A: mitochondria. B: ribosomes. C: endoplasmic reticulum. D: peroxisomes. E: lysosomes.
A: mitochondria
Spherocytosis is a human blood disorder associated with a defective cytoskeletal protein in the red blood cells (RBCs). What do you suspect is the consequence of such a defect? A: abnormally shaped RBCs B: an insufficient supply of ATP in the RBCs C: adherence of RBCs to blood vessel walls, causing plaque formation D: an insufficient supply of oxygen-transporting proteins in the RBCs
A: abnormally shaped RBCs
Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures? A: components of the cytoskeleton B: membrane proteins of the inner nuclear envelope C: cellulose fibers in the cell wall D: free ribosomes and ribosomes attached to the ER
A: components of the cytoskeleton
The primary role of _____ is to bind animal cells together. A: desmosomes B: tight junctions C: plasmodesmata D: gap (communicating) junctions E: the cytoskeleton
A: desmosomes
Where would you expect to find tight junctions? A: in the epithelium of an animal's stomach B: between the smooth endoplasmic reticulum and the rough endoplasmic reticulum C: between plant cells in a woody plant D: in the plasma membrane of prokaryotes
A: in the epithelium of an animal's stomach
Asbestos is a material that was once used extensively in construction. One risk from working in a building that contains asbestos is the development of asbestosis caused by the inhalation of asbestos fibers. Cells will phagocytize asbestos, but are not able to degrade it. As a result, asbestos fibers accumulate in _____. A: lysosomes B: peroxisomes C: mitochondria D: ribosomes
A: lysosomes
The cilia and flagella of eukaryotic cells are composed of _____. A: microtubules B: tonofilaments C: intermediate filaments D: microfilaments E: pili
A: microtubules
Which of the following are common traits of chloroplasts and mitochondria? A: Both have their own DNA. B: Both reproduce by meiosis. C: Both are found in plant and animal cells. D: Both are surrounded by a single membrane. E: Proteins for both are synthesized on ribosomes in the rough ER.
A: Both have their own DNA.
What is the reason that a modern transmission electron microscope (TEM) can resolve biological images to the subnanometer level, as opposed to tens of nanometers achievable for the best super-resolution light microscope? A: Electron beams have much shorter wavelengths than visible light. B: Contrast is enhanced by staining with atoms of heavy metal. C: The focal length of the electron microscope is significantly longer. D: The electron microscope has a much greater ratio of image size to real size.
A: Electron beams have much shorter wavelengths than visible light.
Pancreatic cells, which secrete a large amount of digestive enzymes, are labeled with radioactive leucine and then chased for several hours with nonradioactive leucine. Photographic emulsions are prepared at different times during the chase. Where would the black spots appear on an emulsion prepared 3 hours after the pulse? A: Exterior of the cell B: Secretory vesicles C: Golgi apparatus D: Rough ER
A: Exterior of the cell
A small protein (molecular weight = 25,000 daltons) is injected into a cell and observed in the nucleus a short time later. What type of transport has taken place? A: Passive transport B: Osmosis C: Active transport
A: Passive transport
Select the correct statement describing cellular structure or function. A: Plant and animal cells both carry out cellular respiration, producing ATP. B: Mitochondria and chloroplasts are part of the endomembrane system of the eukaryotic cell. C: Only plant cells contain chloroplasts, and only animal cells contain mitochondria.
A: Plant and animal cells both carry out cellular respiration, producing ATP.
Researchers tried to explain how vesicular transport occurs in cells by attempting to assemble the transport components. They set up microtubular tracks along which vesicles could be transported, and they added vesicles and ATP (because they knew the transport process requires energy). Yet, when they put everything together, there was no movement or transport of vesicles. What were they missing? A: motor proteins B: an axon C: endoplasmic reticulum D: contractile microfilaments
A: motor proteins
Suppose a cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from _____. A: nearly any eukaryotic organism B: a plant but not an animal C: a bacterium D: an animal but not a plant
A: nearly any eukaryotic organism
Which of the following is present in a prokaryotic cell? A: ribosome B: chloroplast C: mitochondrion D: ER
A: ribosome
In the fractionation of homogenized cells using centrifugation, the primary factor that determines whether a specific cellular component ends up in the supernatant or the pellet is the _____. A: size and weight of the component B: presence or absence of lipids in the component C: relative solubility of the component D: percentage of carbohydrates in the component
A: size and weight of the component
Which of the following clues would tell you if a cell is prokaryotic or eukaryotic? A: whether or not the cell is partitioned by internal membranes B: whether or not the cell contains DNA C: whether or not the cell carries out cellular metabolism D: the presence or absence of ribosomes E: the presence or absence of a rigid cell wall
A: whether or not the cell is partitioned by internal membranes
A mutation that disrupts the ability of an animal cell to add polysaccharide modifications to proteins would most likely cause defects in its _____. A: mitochondria and Golgi apparatus B: Golgi apparatus and extracellular matrix C: nuclear pores and secretory vesicles D: nuclear matrix and extracellular matrix
B: Golgi apparatus and extracellular matrix
What is the first step in a pulse-chase experiment? A: Preparing cells for electron microscopy B: Incubating cells with a labeled microscope C: Incubating cells with an unlabeled microscope D: Examining cells for the location of the labeled molecules
B: Incubating cells with a labeled microscope
Which statement about extracellular structures (plant cell walls and the extracellular matrix of animal cells) is correct? A: All extracellular structures form barriers to separate adjacent cells. B: Information can be transmitted from these extracellular structures to the cytoplasm. C: Proteins and lipids are common components of extracellular structures. D: Extracellular structures store energy in the form of polysaccharides for subsequent metabolism by the cell. E: Extracellular structures regulate the passage of water molecules across the cell membrane.
B: Information can be transmitted from these extracellular structures to the cytoplasm.
What is the function of the nuclear pore complex found in eukaryotes? A: It assembles ribosomes from raw materials that are synthesized in the nucleus. B: It regulates the movement of proteins and RNAs into and out of the nucleus. C: It synthesizes the proteins required to copy DNA and make mRNA. D: It selectively transports molecules out of the nucleus, but prevents all inbound molecules from entering the nucleus.
B: It regulates the movement of proteins and RNAs into and out of the nucleus.
What scientific hypothesis can be tested by a pulse-chase experiment? A: The amino acid sequence of a protein B: Movement of molecules through a cell over time C: Solubility of a molecule D: The steady-state amount of protein in a cell
B: Movement of molecules through a cell over time`
Nucleoplasmin is a nuclear protein. This protein was divided into two segments and linked to the same large cytoplasmic protein, generating two fusion proteins. After injecting these fusion proteins into a cell, one of the proteins was found in the nucleus and the other in the cytoplasm. Which of the following conclusions can be drawn from these results? A: One of the fusion proteins entered the nucleus by passive transport. B: Only one of the two fusion proteins possesses a nuclear localization signal. C: Nucleoplasmin does not have a nuclear localization signal. D: The cytoplasmic protein contains a nuclear localization signal.
B: Only one of the two fusion proteins possesses a nuclear localization signal.
Which statement correctly describes an endomembrane function? A: Secretory proteins in transit from one part of the cell to another are carried in lysosomes. B: Products of the ER are usually modified during their transit from the cis to the trans region of the Golgi apparatus. C: The lumen of the endoplasmic reticulum (ER) is continuous with the cell nucleus.
B: Products of the ER are usually modified during their transit from the cis to the trans region of the Golgi apparatus.
You have a cube of modeling clay in your hands. Which of the following changes to the shape of this cube of clay will decrease its surface area relative to its volume? A: Stretch the cube into a long, shoebox shape. B: Round the clay up into a sphere. C: Pinch the edges of the cube into small folds. D: Flatten the cube into a pancake shape.
B: Round the clay up into a sphere.
Choose the best description of the cell cytoskeleton. A: The cell cytoskeleton serves as permanent scaffolding to anchor cell components into position within the cell cytoplasm. B: The cell cytoskeleton is a dynamic network of fibers that can be quickly dismantled and reassembled to change cell shape and the position of cell components. C: The cell cytoskeleton is similar to an animal skeleton in providing rigid internal support and structure to the cell.
B: The cell cytoskeleton is a dynamic network of fibers that can be quickly dismantled and reassembled to change cell shape and the position of cell components.
Gaucher disease is the most common of lipid storage diseases in humans. It is caused by a deficiency of an enzyme necessary for lipid metabolism. This leads to a collection of fatty material in organs of the body including the spleen, liver, kidneys, lungs, brain, and bone marrow. Using your knowledge of the structure of eukaryotic cells, identify the statement below that best explains how internal membranes and the organelles of cells would be involved in Gaucher disease. A: The mitochondria are most likely defective and do not produce adequate amounts of ATP needed for cellular respiration. B: The lysosomes lack sufficient amounts of enzymes necessary for the metabolism of lipids. C: The Golgi apparatus produces vesicles with faulty membranes that leak their contents into the cytoplasm of the cell. D: The rough endoplasmic reticulum contains too many ribosomes which results in an overproduction of the enzyme involved in carbohydrate catalysis.
B: The lysosomes lack sufficient amounts of enzymes necessary for the metabolism of lipids.
Identify the correct statement about differences between rough and smooth endoplasmic reticulum (ER). A: Rough ER consists of a network of membranous tubules and sacs called cisternae, whereas smooth ER is less complex. B: The outer surface of smooth ER lacks ribosomes, whereas the outer surface of rough ER has ribosomes. C: Smooth ER is part of the endomembrane system of the eukaryotic cell, and rough ER is not.
B: The outer surface of smooth ER lacks ribosomes, whereas the outer surface of rough ER has ribosomes
A newspaper ad for a local toy store indicates that an inexpensive toy microscope available for a small child is able to magnify specimens nearly as much as the more costly microscope available in your college lab. What is the primary reason for the price difference? A: The toy microscope does not have the same fine control for focus of the specimen. B: The toy microscope magnifies a good deal, but has low resolution and therefore poor quality images. C: The toy microscope usually uses a different wavelength of light source. D: The college microscope produces greater contrast in the specimens.
B: The toy microscope magnifies a good deal, but has low resolution and therefore low quality images.
In experiments to test whether a protein can enter the nucleus, why would proteins be labeled with fluorescent molecules? A: To make the proteins bigger B: To make the proteins easy to see C: To target the proteins to the nucleus D: To give the protein molecules energy
B: To make the proteins easy to see
All of the following are part of a prokaryotic cell EXCEPT _____. A: ribosomes B: an endoplasmic reticulum C: a plasma membrane D: a cell wall
B: an endoplasmic reticulum
Which structure is not part of the endomembrane system? A: nuclear envelope B: chloroplast C: ER D: Golgi apparatus E: plasma membrane
B: chloroplast
Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through _____. A: plasmodesmata B: gap junctions C: tight junctions D: desmosomes
B: gap junctions
Which of the following macromolecules leaves the nucleus of a eukaryotic cell through pores in the nuclear membrane? A: phospholipids B: mRNA C: DNA D: amino acids
B: mRNA
Which organelle is the primary site of ATP synthesis in eukaryotic cells? A: peroxisome B: mitochondrion C: Golgi apparatus D: lysosome
B: mitochondrion
Cytochalasin D is a drug that prevents actin polymerization. A cell treated with cytochalasin D will still be able to _____. A: contract muscle fibers B: move vesicles within a cell C: divide in two D: extend pseudopodia
B: move vesicles within a cell
Mitochondria are found in _____. A: plant cells only B: plant and animal cells C: animal cells only D: all cells E: animal cells and prokaryotic cells, but not plant cells
B: plant and animal cells
A cell with a predominance of free ribosomes is most likely _____. A: primarily producing proteins for secretion B: primarily producing proteins in the cytosol C: enlarging its vacuole D: constructing an extensive cell wall or extracellular matrix
B: primarily producing proteins in the cytosol
Cell size is limited by _____. A: the number of proteins within the plasma membrane B: surface to volume ratios C: the size of the endomembrane system D: the surface area of mitochondria in the cytoplasm
B: surface to volume ratios
Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle must be involved in this condition? A: the Golgi apparatus B: the lysosome C: the endoplasmic reticulum D: mitochondrion
B: the lysosome
Which organelle often takes up much of the volume of a plant cell? A: peroxisome B: vacuole C: Golgi apparatus D: lysosome
B: vacuole
Which of the following statements about the cytoskeleton is true? A: Chemicals that block the assembly of the cytoskeleton would have little effect on a cell's response to external stimuli. B: Although microtubules are common within a cell, actin filaments are rarely found outside of the nucleus. C: Movement of cilia and flagella is the result of motor proteins causing microtubules to move relative to each other. D: The cytoskeleton of eukaryotes is a static structure most resembling scaffolding used at construction sites.
C: Movement of cilia and flagella is the result of motor proteins causing microtubules to move relative to each other.
What path does a protein in the secretory pathway take, starting from its site of synthesis? A: Golgi apparatus, rough ER, secretory vesicles, plasma membrane B: Rough ER, secretory vesicles, Golgi apparatus, plasma membrane C: Rough ER, Golgi apparatus, secretory vesicles, plasma membrane D: Plasma membrane, secretory vesicles, Golgi apparatus, rough ER
C: Rough ER, Golgi apparatus, secretory vesicles, plasma membrane
H. V. Wilson worked with sponges to gain some insight into exactly what was responsible for holding adjacent cells together. He exposed two species of differently pigmented sponges to a chemical that disrupted the cell-cell interaction (cell junctions), and the cells of the sponges dissociated. Wilson then mixed the cells of the two species and removed the chemical that caused the cells to dissociate. Wilson found that the sponges reassembled into two separate species. The cells from one species did not interact or form associations with the cells of the other species. How do you explain the results of Wilson's experiments? A: The molecules responsible for cell-cell adhesion (cell junctions) were irreversibly destroyed during the experiment. B: One cell functioned as the nucleus for each organism, thereby attracting only cells of the same pigment. C: The molecules responsible for cell-cell adhesion (cell junctions) differed between the two species of sponge. D: The two species of sponge had different enzymes that functioned in the reassembly process.
C: The molecules responsible for cell-cell adhesion (cell junctions) differed between the two species of sponge.
Which of the following statements about the nuclear envelope is false? A: Nuclear pores are made up of a group of proteins that are collectively called the nuclear pore complex. B: Molecules pass into and out of the nucleus through nuclear pores. C: The nuclear envelope is continuous with the Golgi apparatus. D: The nuclear envelope is composed of two lipid bilayers.
C: The nuclear envelope is continuous with the Golgi apparatus.
The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic common to all of these extracellular structures? A: They must block water and small molecules to regulate the exchange of matter and energy with their environment. B: They must provide a rigid structure that maintains an appropriate ratio of cell surface area to volume. C: They are constructed of polymers that are synthesized in the cytoplasm and then transported out of the cell. D: They are composed of a mixture of lipids and nucleotides.
C: They are constructed of polymers that are synthesized in the cytoplasm and then transported out of the cell.
The nuclear lamina is an array of filaments on the inner side of the nuclear membrane. If a method were found that could cause the lamina to fall into disarray, what would you most likely expect to be the immediate consequence? A: failure of chromosomes to carry genetic information B: the loss of all nuclear function C: a change in the shape of the nucleus D: the inability of the nucleus to divide during cell division
C: a change in the shape of the nucleus
Plasmodesmata in plant cells are most similar in function to which of the following structures in animal cells? A: tight junctions B: extracellular matrix C: gap junctions D: desmosomes
C: gap junctions
Which organelle plays a role in intracellular digestion? A: Golgi apparatus B: chloroplast C: lysosome D: ribosome E: plasmodesma
C: lysosome
The smallest cell structure that would most likely be visible with a standard (not super-resolution) research-grade light microscope is a _____. A: microfilament B: microtubule C: mitochondrion D: ribosome
C: mitochondrion
Which structure is common to plant and animal cells? A: chloroplast B: central vacuole C: mitochondrion D: centriole E: wall made of cellulose
C: mitochondrion
Which structure is common to plant and animal cells? A: chloroplast B: centriole C: mitochondrion D: central vacuole
C: mitochondrion
Which of the following is present in a prokaryotic cell? A: nuclear envelope B: ER C: ribosome D: chloroplast E: mitochondrion
C: ribosome
Which structure is the site of the synthesis of proteins that may be exported from the cell? A: plasmodesmata B: Golgi vesicles C: rough ER D: free cytoplasmic ribosomes
C: rough ER
A cell with an extensive area of smooth endoplasmic reticulum is specialized to _____. A: import and export protein molecules B: actively export protein molecules C: synthesize large quantities of lipids D: play a role in storage
C: synthesize large quantities of lipids
Which of these cell junctions form a barrier to the passage of materials? A: desmosomes (anchoring junctions) B: keratin fibers C: tight junctions D: plasmodesmata E: gap (communicating) junctions
C: tight junctions
In a liver cell detoxifying alcohol and some other poisons, the enzymes of the peroxisome remove hydrogen from these molecules and _____. A: combine the hydrogen with water molecules to generate hydrogen peroxide B: transfer the hydrogen to the mitochondria C: transfer the hydrogen to oxygen molecules to generate hydrogen peroxide D: use the hydrogen to break down hydrogen peroxide
C: transfer the hydrogen to oxygen molecules to generate hydrogen peroxide
The Golgi apparatus has a polarity, or sidedness, to its structure and function. Which of the following statements correctly describes this polarity? A: Transport vesicles fuse with one side of the Golgi and leave from the opposite side. B: Lipids in the membrane of the Golgi may be sorted and modified as they move from one side of the Golgi to the other. C: Proteins in the membrane of the Golgi may be sorted and modified as they move from one side of the Golgi to the other. D: All of the listed responses correctly describe polarity characteristics of the Golgi function.
D: All of the listed responses correctly describe polarity characteristics of the Golgi function.
Prokaryotes are classified as belonging to two different domains. What are the domains? A: Archaea and Protista B: Bacteria and Eukarya C: Bacteria and Protista D: Bacteria and Archaea
D: Bacteria and Archaea
Which molecules do not normally cross the nuclear membrane? A: mRNA B: Proteins C: Nucleotide triphosphates D: DNA
D: DNA
A cell has formed a food vacuole as it ingested a food particle. Which of the following events is associated with the breakdown of that food particle? A: The membrane of the food vacuole is derived from the cell wall. B: Enzymes for the breakdown of the food are delivered to the food vacuole from the cytosol. C: Proteins for digestion of the food particle were initially processed in mitochondria. D: Digestion of the food particle occurs in a vesicle enclosed by a membrane that separates the digestion from the cytoplasm. E: Proteins for digestion of the food are made by ribosomes in the Golgi apparatus.
D: Digestion of the food particle occurs in a vesicle enclosed by a membrane that separates the digestion from the cytoplasm.
Which of the following statements correctly describes some aspect of protein secretion from prokaryotic cells? A: Prokaryotes cannot secrete proteins because they lack an endomembrane system. B: The mechanism of protein secretion in prokaryotes is probably the same as that in eukaryotes. C: Prokaryotes cannot secrete proteins because they lack ribosomes. D: Proteins secreted by prokaryotes are synthesized on ribosomes bound to the cytoplasmic surface of the plasma membrane.
D: Proteins secreted by prokaryotes are synthesized on ribosomes bound to the cytoplasmic surface of the plasma membrane.
Which one of the following statements about the endomembrane system is correct? A: Most of the phospholipids of the endomembrane system are synthesized in the mitochondria. B: The endoplasmic reticulum is continuous with the plasma membrane. C: Mitochondria function in the modification and sorting of lipids and proteins. D: Proteins that will be secreted from the cell are likely to be found in closed spaces bounded by membranes of the endomembrane system. E: Ribosomes move lipids and proteins among the different organelles of the endomembrane system.
D: Proteins that will be secreted from the cell are likely to be found in closed spaces bounded by membranes of the endomembrane system.
During a different pulse-chase experiment, photographic emulsions were prepared at different times during the chase, and radioactive spots were detected at the following times and locations: 5 minutes: rough ER; 10 minutes: Golgi apparatus; 40 minutes: endosomes; 70 minutes: lysosomes; 140 minutes: lysosomes. Which of the following conclusions can be drawn from these results? A: The proteins did not travel through the Golgi apparatus. B: The proteins traveled from lysosomes to endosomes. C: The proteins were secreted. D: The final destination of the proteins was the lysosome.
D: The final destination of the proteins was the lysosome.
Which statement correctly describes the nuclear envelope of a eukaryotic cell? A: The nuclear envelope is a single membrane, consisting of a phospholipid bilayer. B: Plasmadesmosomes in the nuclear envelope permit the exchange of macromolecules between the nucleus and the cytoplasm. C: All of the proteins of the cell are synthesized on ribosomes bound on the nuclear envelope. D: The nuclear envelope is continuous with the endoplasmic reticulum. E: The outer layer of the nuclear envelope is coated with laminin.
D: The nuclear envelope is continuous with the endoplasmic reticulum.
Which organelle or structure is absent in plant cells? A: microtubules B: peroxisomes C: mitochondria D: centrosomes
D: centrosomes
The evolution of eukaryotic cells most likely involved _____. A: acquisition of an endomembrane system and subsequent evolution of mitochondria from a portion of the Golgi B: an endosymbiotic fungal cell evolving into the nucleus C: anaerobic archaea taking up residence inside a larger bacterial host cell to escape toxic oxygen the anaerobic bacterium evolved into chloroplasts D: endosymbiosis of an aerobic bacterium in a larger host cell the endosymbiont evolved into mitochondria
D: endosymbiosis of an aerobic bacterium in a larger host cell the endosymbiont evolved into mitochondria
Which of the following contain the 9 + 2 arrangement of microtubules, consisting of nine doublets of microtubules surrounding a pair of single microtubules? A: motile cilia and primary (nonmotile) cilia B: basal bodies and primary (nonmotile) cilia C: centrioles and basal bodies D: flagella and motile cilia
D: flagella and motile cilia
Amoebae move by crawling over a surface (cell crawling), which involves _____. A: cytoplasmic streaming B: reinforcing the pseudopod with intermediate filaments C: setting up microtubule extensions that vesicles can follow in the movement of cytoplasm D: growth of actin filaments to form bulges in the plasma membrane
D: growth of actin filaments to form bulges in the plasma membrane
In a plant cell, DNA may be found _____. A: only in the nucleus B: in the nucleus, mitochondria, chloroplasts, and peroxisomes C: only in the nucleus and chloroplasts D: in the nucleus, mitochondria, and chloroplasts
D: in the nucleus, mitochondria, and chloroplasts
Cyanide binds with at least one molecule involved in producing ATP. If a cell is exposed to cyanide, most of the cyanide will be found within the _____. A: endoplasmic reticulum B: peroxisomes C: lysosomes D: mitochondria
D: mitochondria
Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules? A: nucleic acids B: lipids C: glycogen D: proteins
D: proteins
Which of the following correctly matches an organelle with its function? A: ribosome ... manufacture of lipids B: nucleus ... cellular respiration C: mitochondrion ... photosynthesis D: lysosome ... movement E: central vacuole ... storage
E: central vacuole ... storage
Which structure-function pair is mismatched? A: lysosome; intracellular digestion B: nucleolus; production of ribosomal subunits C: ribosome; protein synthesis D: Golgi; protein trafficking E: microtubule; muscle contraction
E: microtubule; muscle contraction