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 391 Discuss
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The 'Hypothalamus' serves as the link between the nervous system and the endocrine system through the

A
Adrenal gland
B
Pituitary gland
C
Thyroid gland
D
Pancreas

Answer & Explanation

Correct Option: B

The hypothalamus controls the pituitary gland through releasing and inhibiting hormones.
Question 392 Discuss
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Which of the following describes 'Biodiversity Hotspots'

A
Regions with low species richness but high human population
B
Regions with very high species richness and high degree of endemism
C
Areas where only common species are found
D
Pristine areas with no human interference

Answer & Explanation

Correct Option: B

A hotspot must contain a large number of endemic species and face significant habitat loss.
Question 393 Discuss
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In humans the 'Pacinian Corpuscles' are receptors for

A
Pain
B
Pressure
C
Heat
D
Cold

Answer & Explanation

Correct Option: B

Pacinian corpuscles are specialized mechanoreceptors sensitive to deep pressure and vibration.
Question 394 Discuss
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Which process in the plant cell is known as 'Cellular Drinking'

A
Phagocytosis
B
Pinocytosis
C
Exocytosis
D
Plasmolysis

Answer & Explanation

Correct Option: B

Pinocytosis is a form of endocytosis where the cell takes in liquid droplets from the surroundings.
Question 395 Discuss
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The 'Middle Lamella' which holds neighboring plant cells together is mainly composed of

A
Cellulose
B
Hemicellulose
C
Calcium Pectate
D
Lignin

Answer & Explanation

Correct Option: C

Calcium and magnesium pectates act as the 'glue' in the middle lamella layer between cell walls.
Question 396 Discuss
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The term 'Biomagnification' is most commonly associated with which of the following pollutants

A
Carbon Monoxide
B
DDT
C
Sulfur Dioxide
D
Nitrogen Gas

Answer & Explanation

Correct Option: B

Persistent organic pollutants like DDT do not break down and concentrate as they move up the food chain.
Question 397 Discuss
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Which of the following is 'NOT' a lymphoid tissue

A
Spleen
B
Thymus
C
Pancreas
D
Tonsils

Answer & Explanation

Correct Option: C

The pancreas is a digestive and endocrine gland, not part of the lymphatic system.
Question 398 Discuss
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In the human circulatory system 'Double Circulation' involves

A
Blood flowing through the heart twice for every complete circuit
B
Two separate hearts in the body
C
Blood flowing through the lungs twice
D
The use of two aortas

Answer & Explanation

Correct Option: A

Double circulation consists of pulmonary circulation (to lungs) and systemic circulation (to body).
Question 399 Discuss
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Which among the following is a symptom of 'Rickets'

A
Poor blood clotting
B
Soft and deformed bones
C
Gums bleeding
D
Inability to differentiate colors

Answer & Explanation

Correct Option: B

Rickets is caused by Vitamin D deficiency in children, leading to bone softening and 'bow-legs'.
Question 400 Discuss
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The 'Plasmolysis' in a plant cell occurs when it is placed in a

A
Hypotonic solution
B
Hypertonic solution
C
Isotonic solution
D
Pure water

Answer & Explanation

Correct Option: B

In a hypertonic solution, water leaves the cell, causing the protoplast to shrink away from the cell wall.
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