General Science Jkssb Biology Set 1 Mcqs (605 MCQs) | JKSSB & SSC Quiz

General Science

jkssb biology set 1 mcqs

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Practice Questions

605 Total
Question 261 Discuss
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Which of the following is not a function of the Liver

A
Deamination of excess amino acids
B
Production of Insulin
C
Storage of glycogen
D
Detoxification of drugs

Answer & Explanation

Correct Option: B

Insulin is produced by the beta cells of the Islets of Langerhans in the Pancreas, not the liver.
Question 262 Discuss
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Kala-azar is caused by which of the following organisms

A
Plasmodium
B
Leishmania
C
Trypanosoma
D
Entamoeba

Answer & Explanation

Correct Option: B

Kala-azar (Visceral Leishmaniasis) is caused by the protozoan parasite Leishmania donovani and transmitted by sandflies.
Question 263 Discuss
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What happens to the rate of transpiration if the atmospheric pressure decreases

A
It decreases
B
It increases
C
It remains constant
D
It first increases and then stops

Answer & Explanation

Correct Option: B

Lower atmospheric pressure reduces the density of air, allowing water vapor to diffuse more rapidly out of the leaves.
Question 264 Discuss
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Which type of immunity is acquired by a person after recovering from a viral infection like Chickenpox

A
Natural active immunity
B
Natural passive immunity
C
Artificial active immunity
D
Artificial passive immunity

Answer & Explanation

Correct Option: A

Natural active immunity results when the body's own immune system produces antibodies in response to a natural infection.
Question 265 Discuss
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Which of the following correctly describes the function of Osteoblasts

A
Cells that break down bone tissue
B
Cells that form new bone tissue
C
Mature bone cells that maintain metabolism
D
Cells responsible for blood clotting in marrow

Answer & Explanation

Correct Option: B

Osteoblasts are bone-forming cells, while osteoclasts are responsible for bone resorption (breakdown).
Question 266 Discuss
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In the process of Nitrogen fixation which enzyme is responsible for converting atmospheric nitrogen into ammonia

A
Nitratase
B
Nitrogenase
C
Ammoniase
D
Nitrosomonas

Answer & Explanation

Correct Option: B

Nitrogenase is a highly sensitive enzyme found in nitrogen-fixing bacteria (like Rhizobium) that breaks the N2 triple bond.
Question 267 Discuss
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The blood vessel that carries deoxygenated blood from the lower parts of the body to the right atrium is the

A
Pulmonary Vein
B
Superior Vena Cava
C
Inferior Vena Cava
D
Aorta

Answer & Explanation

Correct Option: C

The Inferior Vena Cava collects blood from the trunk and lower limbs, while the Superior Vena Cava collects from the head and arms.
Question 268 Discuss
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Which of the following is the final product of the anaerobic respiration process in Yeast

A
Lactic acid and Energy
B
Ethanol Carbon dioxide and Energy
C
Pyruvate and Water
D
Glucose and Oxygen

Answer & Explanation

Correct Option: B

Yeast undergoes fermentation to produce ethanol and CO2, a process used extensively in brewing and baking.
Question 269 Discuss
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The yellow color of urine in a healthy human is primarily due to the presence of

A
Bilirubin
B
Urochrome
C
Creatinine
D
Uric acid

Answer & Explanation

Correct Option: B

Urochrome (or urobilin) is a pigment resulting from the breakdown of hemoglobin that gives urine its yellow tint.
Question 270 Discuss
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Which cell organelle is known as the 'Storage Sacs' of the cell and is very large in plant cells

A
Lysosomes
B
Golgi Apparatus
C
Vacuoles
D
Endoplasmic Reticulum

Answer & Explanation

Correct Option: C

Vacuoles store water, nutrients, and waste. In plants, the central vacuole provides turgidity to the cell.
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