MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the full form of SLP? |
| A. | Subgeneric Level of Phosphorylation |
| B. | Subcutaneous Level Photophosphorylation |
| C. | Substrate Level Phosphorylation |
| D. | Substrate Level Pyruvatisation |
| Answer» D. Substrate Level Pyruvatisation | |
| 2. |
Which of the following compounds is the first member of the TCA cycle? |
| A. | Oxaloacetic acid |
| B. | α-ketoglutaric acid |
| C. | Succinic acid |
| D. | Malic acid |
| Answer» B. α-ketoglutaric acid | |
| 3. |
How many steps of decarboxylation lead to the formation of ketoglutaric acid? |
| A. | One |
| B. | Three |
| C. | Two |
| D. | Seven |
| Answer» D. Seven | |
| 4. |
After the condensation of an acetyl group, citrate is replaced by malic acid. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
The TCA cycle starts with the condensation of which of the following compounds? |
| A. | Sucrose |
| B. | Acetyl group |
| C. | Ethanol |
| D. | Pyruvate |
| Answer» C. Ethanol | |
| 6. |
Who discovered the Tricarboxylic acid cycle? |
| A. | Hans Krebs |
| B. | Ernst Haeckel |
| C. | Louis Pasteur |
| D. | Charles Darwin |
| Answer» B. Ernst Haeckel | |
| 7. |
How many molecules of NADH are produced by the metabolism of pyruvic acid? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 8. |
Which of the following participates in the reaction catalysed by pyruvic dehydrogenase? |
| A. | Carbon dioxide |
| B. | Water |
| C. | Ethanol |
| D. | Coenzyme A |
| Answer» E. | |
| 9. |
After entering the mitochondrial matrix, pyruvate undergoes reductive decarboxylation. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Which of the following is a crucial event in aerobic respiration? |
| A. | Simultaneous synthesis of ATP |
| B. | Synthesis of ethanol and water |
| C. | Complete oxidation of methanol |
| D. | Complete oxidation of carbon-dioxide |
| Answer» B. Synthesis of ethanol and water | |
| 11. |
How many CO2 molecules are left during the complete oxidation of pyruvate? |
| A. | One |
| B. | Two |
| C. | Five |
| D. | Three |
| Answer» E. | |
| 12. |
Where does the second process of aerobic respiration take place? |
| A. | In the lumen of mitochondria |
| B. | In the matrix of mitochondria |
| C. | In the inner membrane of mitochondria |
| D. | In the cristae of mitochondria |
| Answer» D. In the cristae of mitochondria | |
| 13. |
What is the efficiency of aerobic respiration? |
| A. | More than 75% |
| B. | Approximately 45% |
| C. | Less than 20% |
| D. | 99% |
| Answer» C. Less than 20% | |
| 14. |
Where does aerobic respiration usually takes place? |
| A. | Lower vertebrates |
| B. | Higher organisms |
| C. | Prokaryotes |
| D. | Only unicellular eukaryotes |
| Answer» C. Prokaryotes | |
| 15. |
What is aerobic respiration? |
| A. | Partial oxidation of glucose |
| B. | Incomplete oxidation of glucose |
| C. | Complete oxidation of organic substances |
| D. | Complete oxidation of only glucose |
| Answer» D. Complete oxidation of only glucose | |