Krebs Cycle

Question 1

What is the Citric Acid Cycle also known as?

Answer 1

Krebs Cycle or Tricarboxylic Acid (TCA) Cycle

Question 2

What percentage of ATP is synthesized via the Krebs Cycle?

Answer 2

Approximately 65-70%

Question 3

What does the Krebs Cycle oxidize Acetyl-CoA to?

Answer 3

CO2 and H2O

Question 4

Who proposed the Krebs Cycle and in what year?

Answer 4

Hans Adolf Krebs in 1937

Question 5

What type of metabolic process is the Krebs Cycle primarily considered?

Answer 5

Catabolic

Question 6

Where does the Krebs Cycle occur?

Answer 6

In the mitochondria

Question 7

What are the substrates used in the Krebs Cycle?

Answer 7

Carbohydrates, fatty acids, and amino acids

Question 8

Is the Krebs Cycle an aerobic or anaerobic process?

Answer 8

Aerobic process

Question 9

What is the net energy yield from one glucose molecule in the Krebs Cycle?

Answer 9

38 ATP molecules

Question 10

What is the first step of the Krebs Cycle?

Answer 10

Acetyl-CoA combines with oxaloacetate to form citrate

Question 11

What high-energy molecules are produced in the Krebs Cycle?

Answer 11

NADH and FADH2

Question 12

What regulates the Krebs Cycle?

Answer 12

Substrate availability, product inhibition, allosteric regulation

Question 13

What is the role of Pyruvate Dehydrogenase (PDH) in the Krebs Cycle?

Answer 13

Converts pyruvate to Acetyl-CoA

Question 14

True or False: The Krebs Cycle is a closed system.

Answer 14

False

Question 15

Fill in the blank: The Krebs Cycle is the final common pathway for the oxidation of _______.

Answer 15

carbohydrates, fatty acids, and amino acids