1. Which of the following processes releases energy in plants?
Answer:
Explanation:
Respiration is the metabolic process in which stored energy is released, providing the necessary energy for cellular activities.
2. Where does glycolysis occur in plant cells?
Answer:
Explanation:
Glycolysis, the initial step in the breakdown of glucose, occurs in the cytoplasm.
3. Which of the following is a product of glycolysis?
Answer:
Explanation:
Glycolysis breaks down glucose, producing pyruvate as one of its products.
4. In the absence of oxygen, pyruvate is converted to:
Answer:
Explanation:
In anaerobic conditions, pyruvate undergoes fermentation to produce alcohol in plants.
5. The Krebs cycle takes place in:
Answer:
Explanation:
The Krebs cycle, also known as the citric acid cycle, occurs in the mitochondrial matrix.
6. During respiration, which of the following gases is released?
Answer:
Explanation:
Respiration results in the breakdown of glucose, leading to the release of carbon dioxide.
7. Which molecule acts as the final electron acceptor in aerobic respiration?
Answer:
Explanation:
In aerobic respiration, oxygen acts as the final electron acceptor, forming water.
8. Which of the following processes does not produce ATP?
Answer:
Explanation:
Fermentation regenerates NAD+ but does not produce ATP.
9. The breakdown of one glucose molecule in aerobic respiration releases how many ATP molecules?
Answer:
Explanation:
Through glycolysis, the Krebs cycle, and the electron transport chain, a total of up to 38 ATP molecules can be produced from one glucose molecule.
10. The process of converting glucose into ethanol and carbon dioxide in plants is known as:
Answer:
Explanation:
In the absence of oxygen, plants convert glucose into ethanol and carbon dioxide through alcoholic fermentation.
11. RQ (Respiratory Quotient) for carbohydrates is typically:
Answer:
Explanation:
The Respiratory Quotient (RQ) for carbohydrates is 1, indicating that the amount of CO2 produced is equal to the amount of O2 consumed.
12. In which process is NADH produced?
Answer:
Explanation:
NADH is produced during glycolysis when glucose is broken down.
13. The electron transport chain is located in the:
Answer:
Explanation:
The electron transport chain is situated in the inner membrane of the mitochondria.
14. Which of the following is not a product of the Krebs cycle?
Answer:
Explanation:
The Krebs cycle produces ATP, NADH, and FADH2 but not glucose.
15. In plants, the primary purpose of respiration is to:
Answer:
Explanation:
The primary purpose of respiration in plants is to release energy stored in glucose to be used for various cellular activities.
16. Cyanide affects which part of respiration?
Answer:
Explanation:
Cyanide inhibits the electron transport chain by binding to cytochrome c oxidase.
17. Which enzyme catalyzes the conversion of pyruvate to acetyl-CoA?
Answer:
Explanation:
The conversion of pyruvate to acetyl-CoA is catalyzed by pyruvate dehydrogenase.
18. In anaerobic respiration, the number of ATP molecules produced is:
Answer:
Explanation:
Anaerobic respiration is less efficient than aerobic respiration and produces fewer ATP molecules.
19. Which process produces the most NADH molecules during respiration?
Answer:
Explanation:
The Krebs cycle produces three NADH molecules for each turn, making it the largest producer of NADH during respiration.
20. In which part of the plant cell does anaerobic respiration primarily occur?
Answer:
Explanation:
Anaerobic respiration, or fermentation, primarily takes place in the cytoplasm of the cell.