C3 - Cellular Respiration

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What happens to pyruvate when oxygen is available?

It undergoes fermentation.

It is converted to lactate.

It enters the mitochondria for aerobic respiration. (correct)

It is converted directly to glucose.

What molecule does acetyl CoA bond with before entering the Krebs Cycle?

ADP

NAD+

Coenzyme A (CoA) (correct)

FAD

How many molecules of NADH are produced from one molecule of acetyl CoA during the Krebs Cycle?

4

5

3 (correct)

2

What is the primary function of the electron transport chain?

To produce the majority of ATP. Signup and view all the answers

Who discovered the Krebs Cycle, and what recognition did he receive?

Hans Adolf Krebs; a Nobel Prize in Physiology or Medicine. Signup and view all the answers

What is the role of oxygen in the electron transport chain?

It is the final electron acceptor. Signup and view all the answers

What process occurs in the inner mitochondrial membrane during aerobic cellular respiration?

Electron Transport Chain Signup and view all the answers

What is generated when hydrogen ions move through ATP synthase?

ATP Signup and view all the answers

What is formed as a by-product when oxygen accepts electrons in the ETC?

Water Signup and view all the answers

What is necessary for aerobic cellular respiration to occur?

The presence of oxygen Signup and view all the answers

What is the primary purpose of cellular respiration in cells?

To break down glucose and release energy Signup and view all the answers

Which molecule is produced as a byproduct of aerobic respiration?

Carbon dioxide Signup and view all the answers

Which process occurs in the mitochondria?

Krebs cycle Signup and view all the answers

How much ATP is produced through anaerobic respiration?

2 ATP Signup and view all the answers

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

They store reducing power for ATP synthesis Signup and view all the answers

What is the main difference between aerobic and anaerobic respiration?

Aerobic respiration requires oxygen, while anaerobic does not Signup and view all the answers

In which part of the cell does glycolysis occur?

Cytoplasm only Signup and view all the answers

Which organism primarily relies on fermentation processes?

Bacteria that sour milk Signup and view all the answers

What is the main purpose of glycolysis?

To split glucose into two molecules of pyruvate Signup and view all the answers

Which of the following is NOT a characteristic of glucose that makes it suitable as an energy supply molecule?

Low solubility in water Signup and view all the answers

What is the net gain of ATP produced during glycolysis?

2 ATP Signup and view all the answers

What happens to NAD+ during glycolysis?

It is reduced to NADH. Signup and view all the answers

Which of the following accurately describes the Kreb's cycle?

It involves oxidation reactions and occurs in the mitochondria. Signup and view all the answers

During which stage of aerobic respiration is glucose first broken down?

Glycolysis Signup and view all the answers

Which of these is a high-energy compound produced at the end of glycolysis?

Pyruvate Signup and view all the answers

What type of reaction is glycolysis categorized as?

Anaerobic reaction occurring in the cytoplasm. Signup and view all the answers

What happens during anaerobic respiration when oxygen is unavailable?

Different inorganic chemicals act as electron acceptors. Signup and view all the answers

Which of the following best describes fermentation?

It generates ATP primarily during glycolysis. Signup and view all the answers