Question 18 The process that forms new glucose in the liver is called ... A. gly

Question

Question 18

The process that forms new glucose in the liver is called ...

A.

glycogenolysis

B.

Krebs cycle           

C.

lipolysis

D.

gluconeogenisis

E.

oxidative phosphorylation

A marathoner expends ~3000 kcals of energy over the course of 26 miles. Assuming that the marathon was run at an RQ of 0.85 what is the total O2 uptake in L over the course of the marathon?

A.

158 L

B.

617 L

C.

541 L

D.

625 L

Question 20

Fatty acids are allowed to enter the mitochondria only when they have a CoA group attached to them.

True

False

Question 21

During exercise that is predominately anaerobic, pyruvate is converted to...

A.

NAD+

B.

ATP

C.

lactic acid

D.

acetyl CoA

E.

water

Question 22

How long would it take to burn 100 grams of carbohydrate while exercising at a VO2 of 1.5 liters/min and an RER of 0.77?

A.

1 hour, 32 minutes

B.

3 hours, 20 minutes

C.

4 hours, 11 minutes

D.

5 hours, 17 minutes

A.

glycogenolysis

B.

Krebs cycle           

C.

lipolysis

D.

gluconeogenisis

E.

oxidative phosphorylation

Explanation / Answer

Question 18: The process of forming new glucose in the liver is called Gluconeogenesis. These Glucose can be synthesised using lactate, pyruvate and glucogenic aamino acid. such formation of glucose takes place in liver and kidneys. This process is stimulated by diabetogenic harmone. Thus this process fulfill the need of glucose in the body when external means of glucose like dietery intake is either less or completely absent.This process is thus responsible for maintaining the blood glucose level.

Hence the correct option is (A). Gluconeogenesis

Question 20:  Fatty acids are also allowed to participapate in the meatbolic process inside the mitochondria when they are linked with CoA group of thioester linkage with -SH group of coenzyme A. any defect in the mitochondrial acyl CoA dehydrogenases and thus prevent oxidation of normal fatty acids. for this to the carboxyl end of fatty acid the acetyl CoA group is added.

Thus when CoA group is added o fatty acid then it can activate fatty acid and thus form fatty acyl CoA. This reaction occurs in mitochondrial memberane.

Thus the statement, is True.

Question 21: During exercise the effective means of energy formation is Anaerobic gycolysis. It involves the transformation of glucose to Lactate. In lactic acid formentation pyruvate acts as terminal electron acceptor.It takes place in absence of oxygen or when oxygen isnot sufficient then for oxidation of pyruvate and NADH, NAD+ is generated from NADH by reduction of pyruvate to lactate.

Hence the correct option is (A), NAD+

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