Take this Quiz: A-Level Biology: Respiration | Zestly

Question 1

During the energy investment phase of glycolysis, what is the specific role of ATP in the phosphorylation of glucose?

Accepted Answer

It provides a phosphate group to destabilize the glucose molecule

Question 2

In the electron transfer chain, what is the primary function of the inner mitochondrial membrane's cristae?

Accepted Answer

To provide a large surface area for the attachment of electron carriers and ATP synthase

Question 3

Which of the following statements accurately describe the role of oxygen in aerobic respiration?

Accepted Answer

It acts as the final electron acceptor in the electron transfer chain

Question 4

When oxygen is limited, animal cells perform anaerobic respiration. What is the metabolic fate of pyruvate in this pathway?

Answer

It is converted into ethanol and carbon dioxide

Answer

It is oxidized to acetyl-CoA

Answer

It is reduced to form glucose

Answer

It is reduced to form lactate

Question 5

Which of the following are true regarding the use of lipids as respiratory substrates?

Answer

Lipids are hydrolyzed into glycerol and fatty acids

Answer

Fatty acids are converted directly into pyruvate

Answer

Fatty acids are broken down into two-carbon fragments that enter the Krebs cycle

Answer

Lipids produce less ATP per gram than carbohydrates