$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{Energy (ATP)}$$

Question 1

Which statement best describes the Fluid Mosaic Model of the plasma membrane?

Accepted Answer

It is a dynamic structure consisting of a phospholipid bilayer with embedded proteins and cholesterol.

Question 2

A red blood cell is placed in a hypertonic solution. What is the most likely outcome?

Accepted Answer

The cell will shrink due to water leaving the cell by osmosis.

Question 3

Which organelle is primarily responsible for ATP production through aerobic respiration?

Accepted Answer

Mitochondria

Question 4

During protein synthesis, which process involves the conversion of the nucleotide sequence of mRNA into an amino acid sequence?

Accepted Answer

Translation

Question 5

Which of the following best explains why facilitated diffusion is considered a passive process?

Accepted Answer

It uses carrier or channel proteins to move molecules down their concentration gradient without energy input.

Question 6

A cell is observed to have an abundance of rough endoplasmic reticulum. What is the most likely function of this cell?

Accepted Answer

Protein synthesis for export or membrane insertion

Question 7

Which phase of mitosis is characterized by the alignment of chromosomes along the equator of the cell?

Accepted Answer

Metaphase

Question 8

What is the main function of lysosomes in a cell?

Accepted Answer

Digestion of cellular waste and foreign material

Question 9

Which of the following is true regarding the sodium-potassium pump?

Accepted Answer

It requires ATP to move ions against their concentration gradients.

Question 10

A mutation causes a cell to lose its ability to produce connexons. Which cellular function would be most affected?

Accepted Answer

Cellular communication through gap junctions

Question 11

Which of the following best describes the role of the nucleolus?

Accepted Answer

It synthesizes ribosomal RNA and assembles ribosome subunits.

Question 12

Which equation correctly represents aerobic cellular respiration in mitochondria?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} ightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{Energy (ATP)}$$

Question 13

Which of the following cell junctions is most likely to prevent the passage of water and solutes between adjacent cells in epithelial tissue?

Accepted Answer

Tight junctions

Question 14

A cell is placed in a solution and water moves into the cell, causing it to swell. What type of solution is this?

Accepted Answer

Hypotonic

Question 15

Which of the following is an example of both passive and carrier-mediated transport?

Accepted Answer

Facilitated diffusion

Question 16

During transcription, which molecule is synthesized using DNA as a template?

Accepted Answer

mRNA

Question 17

Which of the following best describes the function of microvilli on the plasma membrane?

Accepted Answer

They increase surface area to enhance absorption.

Question 18

Which type of RNA delivers amino acids to the ribosome during translation?

Accepted Answer

Transfer RNA (tRNA)

Question 19

A cell is observed to have a large number of peroxisomes. What is the most likely function of this cell?

Accepted Answer

Detoxification of free radicals and hydrogen peroxide

Question 20

Which of the following best describes the difference between mitosis and meiosis?

Accepted Answer

Mitosis is for growth and repair, producing diploid cells; meiosis is for gamete production, producing haploid cells.

Cell Biology: Foundations for Anatomy & Physiology (BIOL 109)

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