Q: Which of the following equations correctly represents aerobic cellular respiration in mitochondria?

$$\text{Glucose} + \text{O}_2 + \text{ADP} \rightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{ATP}$$

Question 1

Which of the following best describes the function of the plasma membrane in a typical animal cell?

Accepted Answer

It acts as a selectively permeable barrier, regulating the exchange of substances between the cell and its environment.

Question 2

A scientist observes a cell with a large number of mitochondria. Which of the following is the most likely function of this cell?

Accepted Answer

Active transport of ions requiring high energy

Question 3

Which of the following statements about the sodium-potassium exchange pump is correct?

Accepted Answer

It moves three sodium ions out of the cell and two potassium ions into the cell using ATP.

Question 4

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

Accepted Answer

The cell will gain water and may burst (hemolysis).

Question 5

Which organelle is responsible for the synthesis of ribosomal RNA (rRNA) and assembly of ribosomal subunits?

Accepted Answer

Nucleolus

Question 6

During protein synthesis, what is the role of transfer RNA (tRNA)?

Accepted Answer

It delivers specific amino acids to the ribosome by matching its anticodon to the mRNA codon.

Question 7

Which of the following best explains why water moves rapidly across cell membranes during osmosis?

Accepted Answer

Water moves through abundant water channels called aquaporins, which outnumber solute channels.

Question 8

A cell is observed to have an extensive smooth endoplasmic reticulum (SER). Which function is this cell most likely specialized for?

Accepted Answer

Synthesis of phospholipids, cholesterol, and steroid hormones

Question 9

Which of the following best describes the process of receptor-mediated endocytosis?

Accepted Answer

The cell uses specific receptors to bind and internalize target molecules in clathrin-coated vesicles.

Question 10

Which of the following equations correctly represents aerobic cellular respiration in mitochondria?

Accepted Answer

$$	ext{Glucose} + 	ext{O}_2 + 	ext{ADP} ightarrow 	ext{CO}_2 + 	ext{H}_2	ext{O} + 	ext{ATP}$$

Question 11

A mutation in a gene that codes for a recognition protein in the plasma membrane would most likely affect which cellular function?

Accepted Answer

The cell's ability to identify itself as normal or abnormal to the immune system

Question 12

Which of the following best describes the difference between simple diffusion and facilitated diffusion?

Accepted Answer

Facilitated diffusion requires carrier proteins for molecules too large or polar to pass through the membrane directly.

Question 13

Which of the following is a function of the Golgi apparatus?

Accepted Answer

Modification and packaging of secretions for release from the cell

Question 14

A cell is exposed to a toxin that inhibits the function of lysosomes. Which of the following processes would be most directly affected?

Accepted Answer

Digestion and recycling of damaged organelles

Question 15

Which of the following best explains why the plasma membrane is described as a 'fluid mosaic'?

Accepted Answer

It consists of a phospholipid bilayer with embedded proteins and carbohydrates that can move laterally.

Question 16

Which of the following best describes the role of microtubules in the cytoskeleton?

Accepted Answer

They form spindle apparatus during cell division and serve as tracks for organelle movement.

Question 17

A cell is placed in a solution and begins to shrink. Which of the following best describes the tonicity of the solution relative to the cell?

Accepted Answer

The solution is hypertonic.

Question 18

Which of the following is true regarding the genetic code and protein synthesis?

Accepted Answer

The sequence of three DNA bases (triplet) codes for one amino acid.

Question 19

Which of the following best describes the process of secondary active transport?

Accepted Answer

It relies on the concentration gradient established by primary active transport to move another substance passively.

Question 20

A patient is diagnosed with a genetic disorder that affects the function of peroxisomes. Which of the following cellular processes is most likely impaired?

Accepted Answer

Breakdown of fatty acids and detoxification of hydrogen peroxide

Cellular Level of Organization – Fundamentals of Anatomy & Physiology (Chapter 3 Study Notes)

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