Question 1

Which of the following best describes the role of the receptor in a signal transduction pathway?

Accepted Answer

It binds to the signal molecule and triggers a series of intracellular events leading to a cellular response.

Question 2

Which mode of signaling involves the release of signals that affect nearby cells but not the cell that released the signal?

Accepted Answer

Paracrine Signaling

Question 3

A mutation causes a receptor to bind a signal molecule with much lower affinity than normal. What is the most likely effect on the cell’s response?

Accepted Answer

The cell will require a higher concentration of the signal molecule to trigger a response.

Question 4

Which of the following is NOT a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Synthesizing ATP for cellular energy

Question 5

Which organelle is primarily responsible for energy production through cellular respiration?

Accepted Answer

Mitochondria

Question 6

A cell is observed to have a large central vacuole, a cell wall, and chloroplasts. Which type of cell is this most likely to be?

Accepted Answer

Plant cell

Question 7

Which of the following statements about ATP hydrolysis is correct?

Accepted Answer

ATP hydrolysis releases energy by breaking down ATP into ADP and a phosphate.

Question 8

Which equation correctly represents the first law of thermodynamics as it applies to cellular processes?

Accepted Answer

$$\Delta E = Q - W$$

Question 9

During glycolysis, what is the net gain of ATP and NADH per molecule of glucose?

Accepted Answer

$$2$$ ATP and $$2$$ NADH

Question 10

Which process occurs in the inner mitochondrial membrane and is responsible for generating the majority of ATP during cellular respiration?

Accepted Answer

Oxidative Phosphorylation

Question 11

A scientist discovers a cell with no membrane-bound organelles and a single circular DNA molecule. Which type of cell is this?

Accepted Answer

Prokaryotic cell

Question 12

Which of the following best explains how enzymes increase the rate of biochemical reactions?

Accepted Answer

By lowering the activation energy required for the reaction

Question 13

Which of the following is a correct description of competitive inhibition in enzyme regulation?

Accepted Answer

An inhibitor binds to the active site, preventing substrate binding.

Question 14

Which of the following is a product of the citric acid cycle per molecule of acetyl-CoA?

Accepted Answer

$$2 CO$_2$$, $$3$$ NADH, $$1$$ FADH$$_2$$, $$1$$ ATP

Question 15

Which structure in eukaryotic cells is responsible for packaging proteins and lipids for secretion or delivery to other organelles?

Accepted Answer

Golgi Apparatus

Question 16

Which of the following statements about the electron transport chain (ETC) is correct?

Accepted Answer

The ETC uses NADH and FADH$$_2 to $$pump protons and create a gradient for ATP synthesis.

Question 17

Which of the following best describes the function of intermediate filaments in the cytoskeleton?

Accepted Answer

They anchor organelles and help keep cells together.

Question 18

Which of the following is a correct statement about the relationship between cell surface area and volume?

Accepted Answer

Greater surface area to volume ratio allows cells to perform functions more effectively.

Question 19

Which of the following is a correct description of oxidative phosphorylation?

Accepted Answer

It uses NADH and FADH$$_2 to $$generate ATP and water.

Cell Structure, Function, and Energy Metabolism: Genetics Study Notes

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