Consider statements about plant biology: 1. Photosynthesis occurs in chloroplasts. 2. Respiration occurs in mitochondria. 3. Transpiration occurs through lenticels. Which are correct? MCQ with Answer and Explanation

Question

Consider statements about plant biology: 1. Photosynthesis occurs in chloroplasts. 2. Respiration occurs in mitochondria. 3. Transpiration occurs through lenticels. Which are correct?

A. 2 and 3 only

B. 1 and 3 only

C. 1, 2 and 3

D. 1 and 2 only

Answer: Option D

Solution (By JKExamLibrary)

Photosynthesis, the process of converting light energy into chemical energy, occurs in the chloroplasts, specifically involving the thylakoid membranes and stroma. Cellular respiration, the process of breaking down glucose to release ATP, occurs primarily in the mitochondria. Transpiration is the loss of water vapor from plants, and while it can occur through lenticels (lenticular transpiration) and the cuticle, the vast majority (about 90%) occurs through the stomata (stomatal transpiration). Thus, statements 1 and 2 are correct.

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Question #1

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The disease caused by the human papillomavirus (HPV) is:

A. Cervical cancer

B. Cholera

C. Tuberculosis

D. Malaria

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Correct Answer: Option A

Explanation:
Certain high-risk strains of HPV are a major cause of cervical cancer. Vaccines are available. TB is bacterial, malaria protozoan, cholera bacterial.

This question belongs to: Science Biology

Question #2

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The part of the seed that contains stored food for the embryo is the:

A. Radicle

B. Plumule

C. Seed coat

D. Cotyledon

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Correct Answer: Option D

Explanation:
Cotyledons are seed leaves that store food (starch, proteins, lipids) for the developing embryo and may become photosynthetic after germination. Monocots have one, dicots two. Radicle is root, plumule shoot, seed coat protects.

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Question #3

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Consider statements about plant reproduction: 1. The anther produces pollen. 2. The ovary develops into the fruit. 3. Self-pollination increases genetic diversity. Which are correct?

A. 1 and 3 only

B. 1 and 2 only

C. 1, 2 and 3

D. 2 and 3 only

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Correct Answer: Option B

Explanation:
The anther is the male reproductive part of the flower where microspores develop into pollen grains. After fertilization, the ovary wall matures and develops into the fruit, enclosing the seeds. Self-pollination involves the transfer of pollen to the stigma of the same flower or plant, resulting in offspring genetically identical to the parent, thus decreasing, not increasing, genetic diversity. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology

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