BIO 1009 lecture 5-6

Flagella and cilia a) are formed using microtubules b)all of these answers are correct c)are formed using microfilaments d)are formed using intermediate filaments

a) are formed using microtubules

Microfilaments a)all of these answers are correct b)play an important role in muscle cells c)help cells resist tension, or pulling forces d)play an important role in ameboid movement

a)all of these answers are correct

In animal cells, hydrolytic enzymes are packaged to prevent general destruction of cellular components. Which of the following organelles functions in this compartmentalization? a)lysosome b)mitochondrion c)central vacuole d)chloroplast

a)lysosome

Which structure is common to plant and animal cells? a)mitochondrion b)chloroplast c)wall made of cellulose d)central vacuole

a)mitochondrion

In eukaryotes a)the cytosol is the semi-fluid part of the cytoplasm b)All of these answers are correct. c)the cytoplasm is the part of the cell between the plasma membrane and the nucleus. d)the cytoplasm, but not the cytosol, includes organelles and other large structures.

b)All of these answers are correct.

Chloroplasts a)convert CO2 and H20 into sugars b)all of these answers are correct c)capture energy from light d)contain some of their own DNA

b)all of these answers are correct

Which structure is NOT part of the endomembrane system? a)plasma membrane b)mitochondria c)Golgi apparatus d)nuclear envelope

b)mitochondria

Of the following, which cell structure would likely be most easily visualized using a high-quality light microscope? a)ribosome b)mitochondrion c)microfilament d)microbial

b)mitochondrion

All of the following play an important role in determining or maintaining the structure of plant cells. Which of the following are distinct from the others in their composition? a)microfilaments b)plant cell walls c)microtubules d)intermediate filaments

b)plant cell walls

Which type of organelle is primarily involved in the synthesis of steroids? a)ribosome b)smooth endoplasmic reticulum c)lysosome d)mitochondrion

b)smooth endoplasmic reticulum

Chloroplasts 2 a)are believed to have arisen from symbiotic cyanobacteria (prokaryotes) that somehow survived endocytosis (being engulfed) by another cell. b)are self-replicating. c)All of these answers are correct. d)contain some of their own DNA.

c)All of these answers are correct.

Mitochondria a)are self-replicating. b)are believed to have arisen from symbiotic prokaryotes that somehow survived endocytosis (being engulfed) by another cell c)All of these answers are correct. d)contain some of their own DNA.

c)All of these answers are correct.

Which of the following statements about plasma membranes is TRUE? a)Both prokaryotic and eukaryotic cells have plasma membranes, which function as lipid reserves. b)Only eukaryotic cells have plasma membranes, which act as semi-permeable barriers. c)Both prokaryotic and eukaryotic cells have plasma membranes, which act as semi-permeable barriers. d)Only prokaryotic cells have plasma membranes, which act as semi-permeable barriers.

c)Both prokaryotic and eukaryotic cells have plasma membranes, which act as semi-permeable barriers.

Which of the following statements about plasma membranes is TRUE? a)Only prokaryotic cells have plasma membranes, which act as semi-permeable barriers. b)Only eukaryotic cells have plasma membranes, which act as semi-permeable barriers. c)Both prokaryotic and eukaryotic cells have plasma membranes, which act as semi-permeable barriers. d)Both prokaryotic and eukaryotic cells have plasma membranes, which function as lipid reserves.

c)Both prokaryotic and eukaryotic cells have plasma membranes, which act as semi-permeable barriers.

Cell walls a)are found in plant but not in animal cells b)contain pores known as plasmodesmata c)all of these answers are correct d)are made up of cellulose and other materials

c)all of these answers are correct

Microfilaments a)play an important role in ameboid movement b)help cells resist tension, or pulling forces c)all of these answers are correct d)play an important role in muscle cells

c)all of these answers are correct

Which of the following is a compartment that often takes up much of the volume of a plant cell? a)Golgi apparatus b)lysosome c)central vacuole d)nucleus

c)central vacuole

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules? a)Starches b)glucose c)proteins d)lipids

c)proteins

Which type of organelle is primarily involved in the synthesis of steroids? a)lysosome b)ribosome c)smooth endoplasmic reticulum d)mitochondrion

c)smooth endoplasmic reticulum

Which of the following statements about the Golgi apparatus is TRUE? a)Vesicles from the rough ER bind to the cis face of the Golgi apparatus, rather than to the trans face. b)The Golgi apparatus modifies phospholipids. c)The Golgi apparatus modifies carbohydrates that are attached to proteins (i.e. glycoproteins). d)All of these statements are true.

d)All of these statements are true.

Which statement correctly characterizes bound ribosomes? a)Bound and free ribosomes are structurally different. b)All of these answers are correct. c)Bound ribosomes are enclosed in their own membrane. d)Bound ribosomes generally synthesize membrane proteins and secretory proteins.

d)Bound ribosomes generally synthesize membrane proteins and secretory proteins.

Why isn't the mitochondrion classified as part of the endomembrane system? a)It is not attached to the outer nuclear envelope. b)It is not involved in protein synthesis. c)It has two membrane layers d)Its structure is not derived from the endoplasmic reticulum (ER).

d)Its structure is not derived from the endoplasmic reticulum (ER)

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules? a)Lipids b)Starches c)Glucose d)Proteins

d)Proteins

Which of the following are commonly made by the rough endoplasmic reticulum (ER)? a)membranes b)membrane proteins c)secreted proteins d)all of these answers are correct

d)all of these answers are correct

Large molecules, such as RNA molecules and some proteins, are able to move in and out of the nucleus a)by diffusing across the nuclear membranes b)by inserting themselves between the lipid molecules in the nuclear membranes c)by being broken down to their constituent monomers and then reassembled on the other side of the membrane d)by moving through nuclear pores

d)by moving through nuclear pores

In animal cells, hydrolytic enzymes are packaged to prevent general destruction of cellular components. Which of the following organelles functions in this compartmentalization? a)mitochondrion b)central vacuole c)chloroplast d)lysosome

d)lysosome

Which structure is NOT part of the endomembrane system? a)plasma membrane b)Golgi apparatus c)nuclear envelope d)mitochondria

d)mitochondria

Which of the following is present in a prokaryotic cell? a)chloroplast b)nuclear envelope c)mitochondrion d)ribosome

d)ribosome