Cycles

Question 1

The oxidative decarboxylation of pyruvate is a link step between :

Answer 1

Glycolysis & Tricarboxylic acid cycle

Question 2

TCA cycle takes place in :

Answer 2

Mitochondria

Question 3

During TCA cycle, 20 ATP from oxidation of 2 Acetyl coA through Krebs cycle so, how many ATP are produced per each acetyl coA?

Answer 3

10 ATP

Question 4

In TCA cycle, How many ATP produced at substrate level ?

Answer 4

1 ATP

Question 5

TCA cycle is an aerobic cycle (O2 is a must) & Each Acetyl coA is oxidized produces 2 CO2 molecules & 1 ATP at substrate level, 8 Hydrogen atoms carried on :

Answer 5

3 NADH + H+ & 1 FADH2

Question 6

During TCA cycle, 1.5 ATP from FADH2 oxidation so, How many ATP from 3 NADH + H+ oxidation ?

Answer 6

7.5 ATP (2.5 each)

Question 7

Succinyl CoA is important for :

Answer 7

Heme synthesis & Ketolysis

Question 8

The calculation of energy yield for complete glucose oxidation = 32 ATP per molecule, includes :

Answer 8

7 ATP Glycolysis ,
5 ATP in oxidative decarboxylation of 2 pyruvate to 2 acetyl coA ,
20 ATP in TCA of 2 acetyl coA

Question 9

Each acetyl coA is oxidized through TCA cycle producing :

Answer 9

2 CO2 & 8 Hydrogen

Question 10

High levels of ADP in mitochondria :

Answer 10

Stimulates TCA

Question 11

Name the terminal common pathway of oxidation of glucose, amino acids & lipids :

Answer 11

Tricarboxylic acid cycle (Krebs cycle) (Citric acid cycle)