Question

1. for 1 molecule of glucose (6 C-atoms), the stage of pyruvate processing generates

		NADH, CO2 and Acetyl CoA
		ATP, H+, oxaloacetate
		2NADH, 2CO2 and 2Acetyl CoA
		2ATP, 2H+, 2 oxaloacetate

2. how many reduced electron carriers after glycolysis, pyruvate processing and citric acid cycle are available to make the ET work

		5 NADH, 1 FADH2
		4 ATP, 5NADH, 1 FADH2
		4 ATP, 10NADH, 2 FADH2
		10 NADH, 2 FADH2

Answer 1

Answer =

1. for 1 molecule of glucose (6 C-atoms), the stage of pyruvate processing generates:

2NADH, 2CO2 and 2Acetyl CoA

Explanation :

1 molecule of glucose undergoes glycolysis to generate 2 molecules of pyruvate. These 2 molecules of pyruvate undergoes oxidation called as pyruvate oxidation.

During the conversion of pyruvate into acetyl CoA, a molecule of carbon dioxide and 2 high energy electrons are removed.These electrons are picked up by NAD+ and converted into NADH.

this process occur 2 times. because after glycolysis, 2 molecules of pyruvate are generated. which underoes oxidation produces 2 NADH, 2CO2 & 2 acetyl CoA.

=================================================================================

2. how many reduced electron carriers after glycolysis, pyruvate processing and citric acid cycle are available to make the ET work is :

10NADH, 2 FADH2

Explanation =

NADH and FADH2 are reduced electron carriers.

ATP are high energy molecules , they are not electron carriers.

reduced electron carriers after glycolysis =   2 NADH

reduced electron carriers after pyruvate processing = 2 NADH

and reduced electron carriers after citric acid cycle = 6 NADH & 2 FADH2

Total reduced electron carriers available to make the ET work is = 2 NADH + 2 NADH + 6NADH + 2 FADH2

= 10 NADH & 2 FADH2