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Biology MCQ Practice 9 — Science Foundation Course for Class 11 & 12
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1.
The process of taking in food by Amoeba is known as:
(a) Exocytosis
(b) Phagocytosis
(c) Diffusion
(d) Osmosis
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Correct Answer: (b) Phagocytosis
Explanation:
Amoeba engulfs food particles by phagocytosis
2.
The organelle responsible for packaging and modification of proteins is:
(a) Mitochondria
(b) Golgi apparatus
(c) Ribosome
(d) Lysosome
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Correct Answer: (b) Golgi apparatus
Explanation:
Golgi apparatus modifies, sorts and packages proteins
3.
The hormone that regulates sleep-wake cycle is:
(a) Melatonin
(b) Insulin
(c) Thyroxine
(d) Adrenaline
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Correct Answer: (a) Melatonin
Explanation:
Melatonin is secreted by pineal gland and regulates circadian rhythm
4.
The tissue that transports food in plants is:
(a) Xylem
(b) Phloem
(c) Parenchyma
(d) Collenchyma
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Correct Answer: (b) Phloem
Explanation:
Phloem transports organic food from leaves to other parts
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 cockroach is:
(a) Haemoglobin
(b) Haemocyanin
(c) None (tracheal system)
(d) Myoglobin
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Correct Answer: (c) None (tracheal system)
Explanation:
Cockroaches have tracheal system for respiration
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 organ in the human body is:
(a) Liver
(b) Skin
(c) Brain
(d) Lungs
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Correct Answer: (b) Skin
Explanation:
Skin is the largest organ by surface area
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 for photosynthesis
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