61. Seeds are dormant in conditions of
Water scarcity
Low temperature
Harsh Winters
All of these
✅ The correct answer is option D.
Biology
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62. Deficiency of which of the following causes chlorosis?
Nitrogen
Magnesium
Iron
Both A and B
✅ The correct answer is option D.
63. Which statement about enzyme is incorrect:
Some of them consist solely of protein with no non-protein part.
They catalyze a chemical reaction without being utilized.
All enzymes are fibrous Proteins.
They without their cofactor are called apoenzyme.
✅ The correct answer is option C.
64. Developing seeds are a rich source of
Auxins
Gibberellins
Cytokinins
All of these
✅ The correct answer is option D.
65. Deficiency of K+ causes:
Stunted growth & strong chlorosis
No electron transport chains
The premature death of leaves.
Stunted growth of roots.
✅ The correct answer is option C.
66. In which of the following location enzymes controlling cellular respiration are present?
Nucleus
Chloroplast
Mitochondria
Ribosome
✅ The correct answer is option C.
68. An activated enzyme consisting of the polypeptide chain and a cofactor is called:
Apoenzyme
Holoenzyme
Activated enzyme
Both B and C
✅ The correct answer is option D.
69. What is critical in photoperiodism?
Length of light period
Length of a dark period
Both a and b
None of these
✅ The correct answer is option B.
70. Autotrophic organisms can exist in an exclusively ______ environment.
Organic
Inorganic
Wet
Terrestrial
✅ The correct answer is option B.