$$n\ \text{G-actin} \rightarrow (\text{G-actin})_n$$

Question 1

Which of the following best describes the primary function of the extracellular matrix in animal connective tissues?

Accepted Answer

It provides structural support and mediates cell signaling.

Question 2

Which cytoskeletal element is primarily responsible for resisting mechanical stress in epithelial cells?

Accepted Answer

Intermediate filaments

Question 3

A mutation that disrupts cadherin proteins would most likely affect which cellular process?

Accepted Answer

Cell-cell adhesion

Question 4

Which of the following statements about tight junctions is correct?

Accepted Answer

They prevent the movement of substances through the space between cells.

Question 5

Which equation best represents the polymerization of actin monomers into a microfilament?

Accepted Answer

$$n\ 	ext{G-actin} ightarrow (	ext{G-actin})_n$$

Question 6

A patient with a genetic defect in intermediate filament proteins is most likely to experience which of the following symptoms?

Accepted Answer

Fragile skin that blisters easily

Question 7

Which motor protein is responsible for transporting vesicles along microtubules toward the cell periphery?

Accepted Answer

Kinesin

Question 8

Which of the following best explains why microfilaments and microtubules are considered dynamic structures?

Accepted Answer

They can rapidly assemble and disassemble by adding or removing subunits.

Question 9

Which type of cell junction allows for the direct passage of ions and small molecules between adjacent animal cells?

Accepted Answer

Gap junctions

Question 10

A researcher observes that cancer cells have altered cell adhesion proteins. What is a likely consequence of this alteration?

Accepted Answer

Cancer cells can spread more easily throughout the body.

Question 11

Which of the following is a major component of the extracellular matrix in animal connective tissues?

Accepted Answer

Collagen

Question 12

Which of the following best describes the role of integrins in animal cells?

Accepted Answer

They connect the cytoskeleton to the extracellular matrix.

Question 13

Which cytoskeletal element is most directly involved in the movement of cilia and flagella?

Accepted Answer

Microtubules

Question 14

Which of the following scenarios best illustrates the function of anchoring junctions?

Accepted Answer

Two epithelial cells remain attached to each other during mechanical stress.

Question 15

Which of the following is a function of the plant cell wall but NOT the animal extracellular matrix?

Accepted Answer

Preventing excessive water uptake by the cell

Question 16

A scientist treats animal cells with a drug that disrupts microtubule polymerization. Which process would be most directly affected?

Accepted Answer

Chromosome separation during mitosis

Question 17

Which of the following best explains why the skin is able to resist tearing under mechanical stress?

Accepted Answer

The presence of intermediate filaments and desmosomes

Question 18

Which of the following is a direct consequence of a loss of function mutation in a gap junction protein in cardiac muscle?

Accepted Answer

Impaired electrical signaling between heart cells

Question 19

Which of the following best describes the relationship between the cytoskeleton and cell shape?

Accepted Answer

The cytoskeleton determines and maintains cell shape by providing structural support.

Question 20

Which of the following best explains how extracellular matrix proteins can influence gene expression?

Accepted Answer

By interacting with cell surface receptors that activate intracellular signaling pathways

Cell and Tissue Form: Structure, Function, and Interactions: Ch.10

Study Guide - Practice Questions