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

General Science

jkssb biology set 1 mcqs

Download PDF

Topics

jkssb physics set 1 mcqs jkssb chemistry set 1 mcqs jkssb biology set 1 mcqs

Practice Questions

605 Total
Question 561 Discuss
Ask a Friend

The 'Kyoto Protocol' targets which of the following greenhouse gases specifically

A
Argon
B
Methane (CH4)
C
Nitrogen (N2)
D
Oxygen (O2)

Answer & Explanation

Correct Option: B

The six main GHGs under the protocol include CO2, CH4, N2O, HFCs, PFCs, and SF6.
Question 562 Discuss
Ask a Friend

Identify the 'Application': Why is fruit kept in cold storage for a longer time

A
Respiration rate increases
B
Respiration rate decreases
C
Ethylene production stops completely
D
Sugar content increases

Answer & Explanation

Correct Option: B

Low temperatures slow down enzymatic activities and cellular respiration, preserving the fruit.
Question 563 Discuss
Ask a Friend

Which hormone is secreted by the 'Pineal Gland' to regulate the sleep-wake cycle

A
Melanin
B
Melatonin
C
Serotonin
D
Dopamine

Answer & Explanation

Correct Option: B

Melatonin production increases in darkness, signaling the body that it is time to sleep.
Question 564 Discuss
Ask a Friend

In the human circulatory system the 'Heart Sounds' (Lubb-Dupp) are produced by the

A
Contraction of the ventricles
B
Closing of the valves
C
Flow of blood in the aorta
D
Relaxation of the atria

Answer & Explanation

Correct Option: B

'Lubb' is from AV valves closing; 'Dupp' is from semilunar valves closing.
Question 565 Discuss
Ask a Friend

Identify the 'Tricky' part: Which of the following is 'NOT' a primary lymphoid organ

A
Bone Marrow
B
Spleen
C
Thymus
D
None of these

Answer & Explanation

Correct Option: B

Bone marrow and Thymus are primary; Spleen and Lymph nodes are secondary lymphoid organs.
Question 566 Discuss
Ask a Friend

In the human eye 'Presbyopia' is a defect of vision arising due to

A
Shortness of the eyeball
B
Gradual weakening of ciliary muscles and decreasing flexibility of the lens
C
Damage to the cornea
D
Excessive curvature of the lens

Answer & Explanation

Correct Option: B

This age-related condition makes it difficult to focus on nearby objects.
Question 567 Discuss
Ask a Friend

Which among the following is a 'Facultative' anaerobe

A
Clostridium
B
Yeast
C
Escherichia coli
D
Both B and C

Answer & Explanation

Correct Option: D

Facultative anaerobes can switch to fermentation if oxygen is absent but prefer aerobic respiration.
Question 568 Discuss
Ask a Friend

The 'Functional' unit of contraction in a muscle is the

A
Z-line
B
Sarcomere
C
Myofibril
D
Fascicle

Answer & Explanation

Correct Option: B

A sarcomere is the region between two successive Z-lines in a myofibril.
Question 569 Discuss
Ask a Friend

Identify the hormone responsible for 'Stress' tolerance in plants by inducing stomatal closure

A
Gibberellic Acid
B
Abscisic Acid
C
Indole Acetic Acid
D
Ethylene

Answer & Explanation

Correct Option: B

ABA acts as a chemical signal during water stress to prevent transpiration.
Question 570 Discuss
Ask a Friend

The 'Middle Ear' cavity is filled with

A
Water
B
Air
C
Vitreous humor
D
Lymph

Answer & Explanation

Correct Option: B

The Eustachian tube ensures that the middle ear is filled with air at atmospheric pressure.
Previous Next