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NEET Practice: Biology 6
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1.
The process by which plants release oxygen is called:
(a) Respiration
(b) Photosynthesis
(c) Transpiration
(d) Translocation
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Correct Answer: (b) Photosynthesis
Explanation:
Oxygen is released as a by-product of photosynthesis
2.
The organ that filters blood in the human body is:
(a) Heart
(b) Kidney
(c) Liver
(d) Lungs
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Correct Answer: (b) Kidney
Explanation:
Kidneys filter blood and form urine
3.
The hormone that controls the rate of metabolism is:
(a) Insulin
(b) Thyroxine
(c) Adrenaline
(d) Growth hormone
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Correct Answer: (b) Thyroxine
Explanation:
Thyroxine (T4) regulates basal metabolic rate
4.
The tissue that transports food in plants is:
(a) Xylem
(b) Phloem
(c) Parenchyma
(d) Sclerenchyma
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Correct Answer: (b) Phloem
Explanation:
Phloem transports organic food (translocation)
5.
The process of cell division that reduces chromosome number is:
(a) Mitosis
(b) Meiosis
(c) Binary fission
(d) Budding
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Correct Answer: (b) Meiosis
Explanation:
Meiosis produces haploid gametes
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 carries oxygen in red blood cells
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 traps 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