cellular respiration

Question 1

What is cellular respiration?

Answer 1

Cellular respiration is the process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.

Question 2

What is the primary energy currency of the cell?

Answer 2

Adenosine triphosphate (ATP) is the primary energy currency of the cell.

Question 3

True or False: Cellular respiration occurs in the mitochondria.

Answer 3

True

Question 4

What are the three main stages of cellular respiration?

Answer 4

Glycolysis, the Krebs cycle (Citric Acid Cycle), and the Electron Transport Chain.

Question 5

Fill in the blank: Glycolysis occurs in the _______.

Answer 5

cytoplasm

Question 6

What is the role of the electron transport chain?

Answer 6

The electron transport chain transfers electrons through a series of proteins to create a proton gradient that drives ATP synthesis.

Question 7

Which gas is produced as a byproduct of cellular respiration?

Answer 7

Carbon dioxide (CO2)

Question 8

What is the function of enzymes in cellular respiration?

Answer 8

Enzymes catalyze biochemical reactions, increasing the rate of cellular respiration.

Question 9

True or False: ATP is produced during glycolysis.

Answer 9

True

Question 10

What is the total net gain of ATP from one molecule of glucose after glycolysis?

Answer 10

2 ATP molecules

Question 11

Multiple Choice: Which of the following processes occurs in the mitochondria? A) Glycolysis B) Krebs Cycle C) Fermentation

Answer 11

B) Krebs Cycle

Question 12

What is oxidative phosphorylation?

Answer 12

Oxidative phosphorylation is the process through which ATP is produced in the electron transport chain using energy from electrons and protons.

Question 13

Fill in the blank: The Krebs cycle generates _______ and electron carriers NADH and FADH2.

Answer 13

ATP

Question 14

What is the role of NADH and FADH2 in cellular respiration?

Answer 14

NADH and FADH2 are electron carriers that transport electrons to the electron transport chain.

Question 15

True or False: Fermentation occurs in the presence of oxygen.

Answer 15

False

Question 16

What is the main difference between aerobic and anaerobic respiration?

Answer 16

Aerobic respiration requires oxygen, while anaerobic respiration does not.

Question 17

Multiple Choice: Which molecule is the final electron acceptor in the electron transport chain? A) Oxygen B) Carbon Dioxide C) Glucose

Answer 17

A) Oxygen

Question 18

What is the purpose of the proton gradient created in the electron transport chain?

Answer 18

The proton gradient is used to drive ATP synthesis through ATP synthase.

Question 19

Fill in the blank: The process of converting ADP to ATP is called _______.

Answer 19

phosphorylation

Question 20

What are the end products of aerobic respiration?

Answer 20

ATP, carbon dioxide (CO2), and water (H2O)

Question 21

True or False: ATP can be used directly as an energy source for cellular work.

Answer 21

True

Question 22

What is chemiosmosis?

Answer 22

Chemiosmosis is the movement of protons across a membrane, which drives the synthesis of ATP.

Question 23

Multiple Choice: During which phase of cellular respiration is glucose split into two molecules of pyruvate? A) Krebs Cycle B) Glycolysis C) Electron Transport Chain

Answer 23

B) Glycolysis

Question 24

What is substrate-level phosphorylation?

Answer 24

Substrate-level phosphorylation is the direct transfer of a phosphate group to ADP to form ATP during specific enzymatic reactions.

Question 25

Fill in the blank: The maximum yield of ATP from one glucose molecule in aerobic respiration is approximately _______.

Answer 25

36 to 38 ATP