(Mastering Biology) A Tour of the Cell

Cilia and flagella move due to the interaction of the cytoskeleton with which of the following? A. Pseudopodia B. Actin C. Motor proteins D. Tubulin E. Mitochondria

C. Motor proteins

Which of the following is present in a prokaryotic cell? A. Ribosomes B. Mitochondrion C. ER D. Nuclear envelope E. Chloroplast

A. Ribosomes

Microfilaments function in cell motility including ___ . A. muscle contraction, amoeboid movement, and cytoplasmic streaming in plants B. muscle contraction, amoeboid movement, and centriole function C. muscle contraction, amoeboid movement, and flagella motion D. muscle contraction, amoeboid movement, and cilia motion E. flagella motion, cilia motion, and centriole function

A. muscle contraction, amoeboid movement, and cytoplasmic streaming in plants

The endoplasmic reticulum is part of the endomembrane system, which also includes the ___. A. nuclear envelope, the Golgi apparatus, lysosomes, and vesicles B. nuclear envelope, the Golgi apparatus, mitochondria, and chloroplasts C. mitochondria, the Golgi apparatus, lysosomes, and vesicles D. nuclear envelope, the Golgi apparatus, and mitochondria E. nuclear envelope, the Golgi apparatus, and ribosomes

A. nuclear envelope, the Golgi apparatus, lysosomes, and vesicles

___ are membrane-bound metabolic compartments that specialize in the production of hydrogen peroxide (H2O2) and its conversion to water A. nucleosomes B. ribosomes C. peroxisomes D. centrosomes E. lysosomes

C. Peroxisomes

What is the functional connection between the nucleolus, nuclear pores, and the nuclear membrane? A. The nucleolus contains messenger RNA (mRNA), which crosses the nuclear envelope through the nuclear pores. B. Endoplasmic reticulum membrane is produced in the nucleolus and leaves the nucleus through the nuclear pores C. Subunits of ribosomes are assembled in the nucleolus and pass through the nuclear membrane via the nuclear pores D. The nuclear pores are connections between the nuclear membrane and the endoplasmic reticulum that permit ribosomes to assemble on the surface of the ER

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

Which statement about the cytoskeleton is true? A. plant cell lack a cytoskeleton because they have a rigid cell wall B. microtubules are chains of proteins that resist stretching C. components of the cytoskeleton often mediate the movement of organelles within the cytoplasm D. intermediate filaments are hollow tubes of protein that provide structural support E. microfilaments are more permanent structures in cells compared to intermediate filaments and microtubules

C. components of the cytoskeleton often mediate the movement of organelles within the cytoplasm

Bacterial cells are prokaryotic. Unlike a typical eukaryotic call they ___. A. lack a plasma membrane B. lack chromosomes C. have no membrane-bound organelles in their cytoplasm D. have a smaller nucleus E. have no ribosomes

C. have no membrane-bound organelles in their cytoplasm

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

C. in the rough endoplasmic reticulum

A substance moving from outside the cell into the cytoplasm must pass through ___. A. the nucleus B. a microtubule C. the plasma membrane D. the endomembrane system E. a ribosome

C. the plasma membrane

The function of the rough endoplasmic reticulum (RER) is ___. A. to store calcium ions B. to synthesize sex hormones C. to synthesize proteins that are secreted as glycoproteins D. to synthesize lipids E. to detox drugs and alcohol

C. to synthesize proteins that are secreted as glycoproteins

Which of the following groups is primarily involved in synthesizing molecules needed by the cell? A. Rough endoplasmic reticulum, lysosome, and vacuole B. Lysosome, vacuole, and ribosomes C. Smooth endoplasmic reticulum, ribosomoses, and vacuole D. Ribosomes, rough endoplasmic reticulum, and smooth endoplasmic reticulum E. Vacuole, rough endoplasmic reticulum, and smooth endoplasmic reticulum

D. Ribosomes, rough endoplasmic reticulum, and smooth endoplasmic reticulum

The network of fibers that organizes structures and activities in a cell ___. A. are microfilaments B. are microtubules C. are intermediate filaments D. is the cytoskeleton E. are centrioles

D. is the cytoskeleton

Cell motility, which includes changes both in cell location and in the movement of cell parts, requires interactions of the cytoskeleton ___. A. without ATP B. with "feet" to "walk" C. with glycosomes D. with motor proteins E. with the endoplasmic reticulum

D. with motor proteins

The endosymbiont theory explains the origins of ___. A. Chloroplasts and the plant cell vacuole B. the Golgi apparatus and mitochondria C. mitochondria and ribosomes D. There is no correct answer because the endosymbiotic theory is no longer supported. E. mitochondria and chloroplasts

E. mitochondria and chloroplasts