1. Which of the following elements is essential for the synthesis of chlorophyll?
Answer:
Explanation:
Iron is crucial for the synthesis of chlorophyll, a pigment vital for photosynthesis.
2. Which process allows plants to fix atmospheric nitrogen?
Answer:
Explanation:
Nitrogen fixation refers to the process by which atmospheric nitrogen is converted into a usable form by plants.
3. The deficiency of which mineral results in chlorosis in plants?
Answer:
Explanation:
Chlorosis, or the yellowing of leaves, is a symptom of nitrogen deficiency.
4. Which element is necessary for the activation of enzymes and is a component of middle lamella?
Answer:
Explanation:
Calcium is essential for enzyme activation and is a crucial component of the middle lamella in plant cells.
5. Which of the following is a micronutrient for plants?
Answer:
Explanation:
Molybdenum is considered a micronutrient as plants require it in minute amounts.
6. The mineral essential for the synthesis of DNA and RNA in plants is:
Answer:
Explanation:
Phosphorus is a vital component of nucleotides, which are building blocks of DNA and RNA.
7. Leguminous plants have a symbiotic relationship with:
Answer:
Explanation:
Leguminous plants form nodules in their roots that house Rhizobium bacteria, which help in nitrogen fixation.
8. Which element is involved in the opening and closing of stomata?
Answer:
Explanation:
Potassium ions play a central role in the regulation of stomatal movements.
9. Which element is a component of the coenzyme NAD and NADP?
Answer:
Explanation:
Nitrogen is a component of NAD and NADP, which play pivotal roles in various biochemical reactions.
10. The process by which plants obtain their nitrogen from nitrates is:
Answer:
Explanation:
Nitrate assimilation is the process through which plants convert nitrates into ammonia for further use.
11. Which element is crucial for photolysis of water during photosynthesis?
Answer:
Explanation:
Manganese acts as a catalyst in the photolysis of water during the light-dependent reactions of photosynthesis.
12. The deficiency of which mineral can lead to the inhibition of cell division in plants?
Answer:
Explanation:
Calcium deficiency can lead to an inhibition of cell division in plant roots.
13. Which of the following minerals is important for the stabilization of ribosomes?
Answer:
Explanation:
Magnesium plays a role in the stabilization of ribosomes, which are crucial for protein synthesis.
14. Which mineral plays a role in nitrogen metabolism in plants?
Answer:
Explanation:
Molybdenum is essential for enzymes involved in nitrogen metabolism in plants.
15. Which of the following is not a symptom of mineral deficiency in plants?
Answer:
Explanation:
Enhanced growth is not a typical symptom of mineral deficiency; instead, deficiencies generally hinder growth.
16. Plants obtain which of the following minerals directly from the atmosphere?
Answer:
Explanation:
Plants obtain carbon directly from the atmosphere in the form of carbon dioxide during photosynthesis.
17. Which mineral is important for the functioning of the enzyme ribulose bisphosphate carboxylase?
Answer:
Explanation:
Magnesium is crucial for the enzyme ribulose bisphosphate carboxylase, which is vital for photosynthesis.
18. The conversion of ammonia into amino acids involves the addition of:
Answer:
Explanation:
The conversion of ammonia into amino acids involves the assimilation of carbon skeletons.
19. The term 'chlorosis' refers to:
Answer:
Explanation:
Chlorosis refers to the symptom of yellowing of leaves due to the inadequate formation of chlorophyll.
20. The process by which atmospheric nitrogen is converted into ammonia by certain bacteria is called:
Answer:
Explanation:
Nitrogen fixation is the process where specific bacteria convert atmospheric nitrogen into a form usable by plants.