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Plant Growth and Mineral Nutrition MCQ:
1. What is the most important mineral nutrient for plant growth?
a) Nitrogen
b) Phosphorus
c) Potassium
d) Carbon
Answer: a) Nitrogen
2. Cytochrome is:
a) A type of chlorophyll
b) A cellular organelle
c) An enzyme involved in respiration
d) A plant hormone
Answer: c) An enzyme involved in respiration
3. Who among the following presented the theory of essential mineral nutrients in plants?
a) Robert Hooke
b) Gregor Mendel
c) Julius von Sachs
d) Dmitri Mendeleev
Answer: c) Julius von Sachs
4. Which one of the following is a Magnesium deficiency syndrome?
a) Chlorosis of leaves
b) Stunted growth
c) Wilting of leaves
d) Leaf curling
Answer: a) Chlorosis of leaves
5. How many essential nutrients does a plant require?
a) 10
b) 20
c) 30
d) 50
Answer: a) 10
6. Which of the following is a symbiotic nitrogen fixer?
a) Azotobacter
b) Rhizobium
c) Mycorrhiza
d) Frankia
Answer: b) Rhizobium
7. What is the role of mineral nutrition in plant growth?
a) Providing structural support
b) Serving as cofactors for enzymatic reactions
c) Facilitating energy transfer
d) All of the above
Answer: d) All of the above
8. Who proposed the idea that plants require essential minerals?
a) Julius von Sachs
b) Robert Hooke
c) Gregor Mendel
d) Louis Pasteur
Answer: a) Julius von Sachs
9. What are the minerals and nutrition of plants?
a) Macronutrients and micronutrients
b) Nitrogen, phosphorus, and potassium
c) Iron, zinc, and manganese
d) All of the above
Answer: d) All of the above
10. How do plants use mineral nutrients for growth?
a) Incorporating them into cellular structures
b) Using them as cofactors for enzymatic reactions
c) Facilitating photosynthesis and respiration
d) All of the above
Answer: d) All of the above
11. Which of the following elements is not an essential micronutrient for plant growth?
a) Zinc
b) Copper
c) Magnesium
d) Manganese
Answer: c) Magnesium
12. What are the nutrients for plant growth?
a) Macronutrients and micronutrients
b) Water and sunlight
c) Oxygen and carbon dioxide
d) All of the above
Answer: a) Macronutrients and micronutrients
13. How many nutrients are there for plant growth?
a) 10
b) 20
c) 30
d) 50
Answer: a) 10