The plant response to touch, such as the closing of Mimosa pudica leaves, is: MCQ with Answer and Explanation

The plant response to touch, such as the closing of Mimosa pudica leaves, is:
A. Thigmotropism
B. Phototropism
C. Thigmonasty
D. Geotropism
Answer: Option C
Solution (By JKSSB Mock Tests)
Thigmonasty (seismonasty) is a non-directional, rapid response to touch or vibration, exemplified by the drooping of Mimosa pudica leaves. Thigmotropism is directional growth towards/away from touch (e.g., tendrils). Phototropism is light-directed growth, geotropism gravity-directed.

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The 'Green Revolution' in India, which led to a massive increase in wheat and rice production, was primarily led by the efforts of:
A. M.S. Swaminathan
B. Verghese Kurien
C. Norman Borlaug
D. Both B and C

Correct Answer: Option D


Explanation:
The Green Revolution in India was a period of significant agricultural transformation. Norman Borlaug, the 'father of the Green Revolution' globally, developed high-yielding, disease-resistant dwarf wheat varieties in Mexico. M.S. Swaminathan, known as the 'father of the Green Revolution in India', adapted these varieties to Indian conditions and led the scientific and administrative efforts to introduce these high-yielding varieties (along with improved irrigation and fertilizers) to Indian farmers, drastically increasing wheat and rice production.

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Question #2
In a double-stranded DNA, adenine pairs with thymine by how many hydrogen bonds?
A. Two
B. One
C. Four
D. Three

Correct Answer: Option A


Explanation:
Adenine (A) pairs with thymine (T) via two hydrogen bonds. Guanine (G) pairs with cytosine (C) via three hydrogen bonds. This base pairing (complementarity) is key to the double helix structure and ensures accurate replication and transcription. The higher number of bonds between G-C contributes to DNA stability; GC-rich regions are harder to denature.

This question belongs to: Science Biology
Question #3
The hormone that promotes the development of the corpus luteum after ovulation is:
A. Prolactin
B. LH
C. FSH
D. Estrogen

Correct Answer: Option B


Explanation:
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