MasteringBio Chapter 6 Practice Test

Which of the following is false in respect to eukaryotic chromosomes? a) All eukaryotic cells possess one or more chromosomes. b) Chromosomes only appear as a cell is about to divide. c) Chromosomes are present throughout a cell's reproductive cycle. d) Chromosomes are present even when cells are not actively synthesizing proteins. e) None of the listed responses is false.

Chromosomes only appear as a cell is about to divide.

true statement about the cytoskeleton

Components of the cytoskeleton often mediate the movement of organelles within the cytoplasm

Microtubules and microfilaments commonly work with which of the following to perform many of their functions? lysosomes ribosomes Golgi apparatus RNA None of the listed responses is correct.

Golgi apparatus

the functional connection between the nucleolus, nuclear pores, and the nuclear membrane

Subunits of ribosomes are assembled in the nucleolus and pass through the nuclear membrane via the nuclear pores

centrioles are found in _______ cells, but not ______ cells

animal, plant; Although plant cells have a microtubule organizing center, they lack a pair of centrioles

Consider two cells with the same volume but with very different surface areas due to differences in their shapes. The cell with the larger surface area is likely to _____. a) be nearly spherical in shape b) be buried deep in the interior of an organism c) be involved in the rapid uptake of compounds from the cell's environment d) be a prokaryotic cell e) have a very high metabolic rat

be involved in the rapid uptake of compounds from the cell's environment

basal bodies are most closely associated with what cell component?

cilia; the microtubule assembly of a cilium or flagellum is anchored in the cell by a basal body

Consider a protein that is made in the rough endoplasmic reticulum. You observe that when the synthesis of the protein is completed, the protein is located in the ER membrane. Where else in the cell might this protein be found?

embedded in the plasma membrane functioning in the transport of molecules into the cell

the following organelle is unlikely to show enhanced abundance in pancreatic cells that secrete large amounts of digestive enzymes

free cytoplasmic ribosomes

A protein that ultimately functions in the plasma membrane of a cell is most likely to have been synthesized _____. on free cytoplasmic ribosomes in the smooth endoplasmic reticulum in the ribosomes of the mitochondria in the plasma membrane in the rough endoplasmic reticulum

in the rough ER

cell fractionation ____

separates cells into their component parts

Which of the following is/are possible site(s) of protein synthesis in a typical eukaryotic cell? the cytoplasm the rough endoplasmic reticulum in mitochondria The first two answers are correct. The first three answers are correct.

the first three answers are correct

A dish of animal cells was grown in the presence of radioactive phosphorous. The phosphorous largely ended up in nucleotides inside the actively growing animal cells. In which cellular structure(s) would you predict the majority of the radioactive phosphorous to accumulate?

the nucleus

Which statement about the cytoskeleton is true? Microfilaments are more permanent structures in cells compared to intermediate filaments and microtubules. Plant cells lack a cytoskeleton because they have a rigid cell wall. Components of the cytoskeleton often mediate the movement of organelles within the cytoplasm. Intermediate filaments are hollow tubes of protein that provide structural support. Microtubules are chains of proteins that resist stretching.

Components of the cytoskeleton often mediate the movement of organelles within the cytoplasm.

Which of the following is false? Mitochondria contain ribosomes in the intermembrane space. Mitochondria have more than one membrane. Mitochondria are involved in energy metabolism. Mitochondria possess their own DNA. The folds of the inner mitochondrial membrane are called cristae.

Mitochondria contain ribosomes in the intermembrane space.

Where would you expect to find proteins involved with movement of structures within a cell?

cytoskeleton

Which of the following five membranes is most likely to have a lipid composition that is distinct from the other four? lysosome membrane plasma membrane Golgi apparatus mitochondrial outer membrane endoplasmic reticulum

mitochondrial outer membrane

Which of the following organelles might be found inside other organelles? (eText Concept 6.5) the nucleolus transport vesicles mitochondria ribosomes No organelles are found inside of other organelles.

ribosomes

Which of the following lack membranes as part of their structure? mitochondria ribosomes peroxisomes endoplasmic reticulum Golgi apparatus

ribosomes, peroxisomes

You would expect a cell with an extensive Golgi apparatus to _____. make a lot of ATP absorb nutrients in the GI tract store large quantities of ions secrete a lot of protein move rapidly

secrete a lot of protein