Question 1 The reaction pathway below shows the cleavage of Chymotrypsinogen by

Question

Question 1

The reaction pathway below shows the cleavage of Chymotrypsinogen by Trypsin, resulting in the active form of the protease Chymotrypsin. What is the zymogen?

Trypsin

Chymotrypsinogen

Chymotrypsin

Unused fragments

None of the above

Question 2

Which of the following is/are products of the net reactions of glycolysis?

ADP

NAD+

Pyruvate

All of the above

Question 4

Shown below is a skeleton of the Citric Acid Cycle with some of the by-products shown. Each reaction is numbered, and the number of carbons contained in each intermediate are indicated (e.g. 6C for 6 carbons). In addition to step 8, in which two steps are NADH produced?

1 and 3

2 and 7

2 and 5

3 and 4

Question 5

What product(s) is/are common to two of the reactions of the Citric Acid Cycle and the Pyruvate Dehydrogenase reaction?

ATP and NADH

ATP and CO2

NADH only

Both CO2 and NADH

ATP, NADH, and CO2

Question 3

Glycolysis nets _____ molecule(s) of ATP per molecule of glucose.

1

2

3

4

Trypsin

Chymotrypsinogen

Chymotrypsin

Unused fragments

None of the above

Question 2

Which of the following is/are products of the net reactions of glycolysis?

ADP

NAD+

Pyruvate

All of the above

Question 4

Shown below is a skeleton of the Citric Acid Cycle with some of the by-products shown. Each reaction is numbered, and the number of carbons contained in each intermediate are indicated (e.g. 6C for 6 carbons). In addition to step 8, in which two steps are NADH produced?

1 and 3

2 and 7

2 and 5

3 and 4

Question 5

What product(s) is/are common to two of the reactions of the Citric Acid Cycle and the Pyruvate Dehydrogenase reaction?

ATP and NADH

ATP and CO2

NADH only

Both CO2 and NADH

ATP, NADH, and CO2

Question 3

Glycolysis nets _____ molecule(s) of ATP per molecule of glucose.

1

2

3

4

Explanation / Answer

1. Chymotrypsinogen - Zymogens are proteins that display no catalytic activity.
2. Pyruvate
3. 2
Glycolysis
2 NADH produce
                   4ATP produce
                   2ATP used
                  --------------
Net ATP produced = 2ATP

If we include NADH. The overall ATP is 8.

4. Image not shown here. TCA cycle
Isocitrate --- alpha ketoglutarate
alpha ketoglutarate ---- Succinyl CoA
Oxaloacetate ------- Citrate

5. Both CO2 and NADH

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