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Biology MCQ Practice 12 — Science Foundation Course for Class 11 & 12
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1.
The mode of nutrition in green plants is:
(a) Heterotrophic
(b) Autotrophic
(c) Saprophytic
(d) Parasitic
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Correct Answer: (b) Autotrophic
Explanation:
Green plants prepare their own food by photosynthesis
2.
The organelle that is called the "kitchen of the cell" is:
(a) Mitochondria
(b) Chloroplast
(c) Ribosome
(d) Golgi apparatus
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Correct Answer: (b) Chloroplast
Explanation:
Chloroplast is the site of photosynthesis
3.
The hormone that regulates blood sugar level is:
(a) Thyroxine
(b) Insulin
(c) Adrenaline
(d) Growth hormone
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Correct Answer: (b) Insulin
Explanation:
Insulin lowers blood glucose level
4.
The tissue that conducts water in plants is:
(a) Phloem
(b) Xylem
(c) Parenchyma
(d) Collenchyma
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Correct Answer: (b) Xylem
Explanation:
Xylem transports water and minerals
5.
The process of cell division that maintains chromosome number is:
(a) Meiosis
(b) Mitosis
(c) Binary fission
(d) Budding
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Correct Answer: (b) Mitosis
Explanation:
Mitosis produces two identical daughter cells
6.
The respiratory pigment in human blood is:
(a) Myoglobin
(b) Haemoglobin
(c) Chlorophyll
(d) Haemocyanin
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Correct Answer: (b) Haemoglobin
Explanation:
Haemoglobin transports oxygen
7.
The basic unit of heredity is:
(a) Chromosome
(b) Gene
(c) DNA
(d) Nucleus
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Correct Answer: (b) Gene
Explanation:
Gene is the unit of heredity
8.
The largest gland in the human body is:
(a) Pancreas
(b) Liver
(c) Thyroid
(d) Pituitary
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Correct Answer: (b) Liver
Explanation:
Liver performs many metabolic functions
9.
The pigment responsible for photosynthesis is:
(a) Haemoglobin
(b) Chlorophyll
(c) Melanin
(d) Carotene
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Correct Answer: (b) Chlorophyll
Explanation:
Chlorophyll absorbs light energy
10.
The functional unit of the kidney is:
(a) Neuron
(b) Nephron
(c) Alveolus
(d) Sarcomere
Show Answer & Explanation
Correct Answer: (b) Nephron
Explanation:
Nephron filters blood and forms urine