Q. No.The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of:
1. ATP in small stepwise units
2. ATP in one large oxidation reaction
3. Sugars
4. Nucleic acids
1. ATP in small stepwise units
2. ATP in one large oxidation reaction
3. Sugars
4. Nucleic acids
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How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to and yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 Kcal?
| 1. | Two | 2. | Thirty |
| 3. | Fifty-seven | 4. | One |
The enzyme, decarboxylase, catalyses the following step :
1. conversion of citric acid to cis aconitic acid
2. fumaric acid to malic acid
3. oxalosuccinic acid to -ketoglutaric acid
4. malic acid to oxaloacetic acid
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Pyruvate is transported into the mitochondria by:
1. Simple diffusion
2. Facilitated diffusion
3. Active transport
4. Either 2 or 3, depending on the availability of oxygen
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Match the following and choose the correct option from those given below.
| Column A | Column B | ||
| A. | Molecular oxygen | i. | \(\alpha\)-Ketoglutaric acid |
| B. | Electron acceptor | ii. | Hydrogen acceptor |
| C. | Pyruvate dehydrogenase | iii. | Cytochrome C |
| D. | Decarboxylation | iv. | Acetyl CoA |
Options :
| A | B | C | D | |
| 1. | ii | iii | iv | i |
| 2. | iii | iv | ii | i |
| 3. | ii | i | iii | iv |
| 4. | iv | iii | i | ii |
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A reducing agent in a redox reaction:
1. gains electrons and gains energy.
2. loses electrons and loses energy.
3. gains electrons and loses energy.
4. loses electrons and gains energy.
When an electron is shifted to a more electronegative atom, its potential energy:
| 1. | increases | 2. | decreases |
| 3. | remains same | 4. | can increase or decrease |
By the end of glycolysis, most of the original energy in the glucose molecule is:
1. utilized to form ATP.
2. retained in the pyruvate.
3. stored in the NADH produced.
4. lost as heat.
The number of molecules of carbon dioxide produced by three turns of the Krebs cycle would be:
| 1. | 3 | 2. | 6 |
| 3. | 12 | 4. | 18 |
What is the total number of NADH and molecules produced for each molecule of glucose metabolized by glycolysis and the citric acid cycle?
| 1. | 5 | 2. | 6 |
| 3. | 10 | 4. | 12 |
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