Q: Which of the following equations correctly represents the overall process of aerobic cellular respiration?

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

Question 1

Which of the following best describes the main structural difference between squamous, cuboidal, and columnar epithelial cells?

Accepted Answer

Squamous cells are flat and thin, cuboidal cells are cube-shaped, and columnar cells are tall and rectangular.

Question 2

A patient is diagnosed with under-nourishment. Which of the following best describes their condition?

Accepted Answer

They are not consuming enough calories to meet their energy needs.

Question 3

Which of the following statements about LDL and HDL cholesterol is correct?

Accepted Answer

LDL transports cholesterol to tissues and is associated with increased risk of heart disease, while HDL removes cholesterol from tissues and is considered protective.

Question 4

Which of the following best explains why enzymes are sensitive to changes in pH and temperature?

Accepted Answer

Changes in pH and temperature can alter the enzyme's three-dimensional structure, affecting the shape of the active site.

Question 5

Which of the following is a key difference between aerobic and anaerobic cellular respiration?

Accepted Answer

Aerobic respiration uses oxygen as the final electron acceptor, while anaerobic respiration does not.

Question 6

Which of the following best describes the role of NADH in cellular respiration?

Accepted Answer

NADH donates electrons to the electron transport chain, which helps generate ATP through chemiosmosis.

Question 7

Which of the following equations correctly represents the overall process of aerobic cellular respiration?

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 8

Which of the following best explains why cancer is considered a disease of the cell cycle?

Accepted Answer

Cancer results from uncontrolled cell division due to failures in cell cycle regulation.

Question 9

Which of the following is a similarity between exergonic and endergonic reactions?

Accepted Answer

Both require activation energy to proceed.

Question 10

A scientist observes a cell with homologous chromosomes aligning at the metaphase plate. Which phase of cell division is being observed?

Accepted Answer

Metaphase I of meiosis

Question 11

Which of the following best describes the process of chemiosmosis in cellular respiration?

Accepted Answer

The movement of protons across a membrane to drive ATP synthesis via ATP synthase.

Question 12

Which of the following is a function of the digestive system?

Accepted Answer

Breaking down food into absorbable units and eliminating indigestible waste.

Question 13

Which of the following best explains how meiosis contributes to genetic variability?

Accepted Answer

By allowing crossing over and independent assortment of chromosomes.

Question 14

Which of the following is a correct statement about competitive inhibition of enzymes?

Accepted Answer

A competitive inhibitor binds to the active site, blocking substrate binding.

Question 15

Which of the following is a difference between simple and complex carbohydrates?

Accepted Answer

Simple carbohydrates consist of one or two sugar units, while complex carbohydrates are made of many sugar units.

Question 16

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

A phosphate group is directly transferred from a substrate molecule to ADP to form ATP.

Question 17

Which of the following is a pro of taking vitamin supplements?

Accepted Answer

They can help prevent deficiencies in individuals with restricted diets.

Question 18

Which of the following is a correct equation for the net ATP yield from glycolysis per molecule of glucose?

Accepted Answer

$$ 	ext{Glucose} ightarrow 2\,	ext{Pyruvate} + 2\,	ext{ATP (net)} + 2\,	ext{NADH} $$

Question 19

Which of the following is a way that poisons can affect cellular respiration?

Accepted Answer

By inhibiting enzymes in the electron transport chain, preventing ATP production.

Question 20

Which of the following best describes the difference between a cofactor and a coenzyme?

Accepted Answer

A cofactor is a non-protein helper (often a metal ion), while a coenzyme is an organic molecule that assists enzymes.

Unit 2 Study Guide: Cell Structure, Metabolism, and Genetics

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