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 11 Discuss
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Which acid is used as a souring agent added to vinegar, pickled vegetables, and sauces, and as a raw material for seasoning?

A
Citric acid
B
Acetic acid
C
Tartaric acid
D
Formic acid

Answer & Explanation

Correct Option: B

Acetic acid is the primary organic compound responsible for giving vinegar its sharp, sour taste and pungent smell, making it a standard culinary souring agent.
Question 12 Discuss
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Which of the following is a characteristic of both mammals and birds?

A
Viviparity
B
Pigmented skin
C
Pneumatic bones
D
Warm blooded

Answer & Explanation

Correct Option: D

Both mammals and birds are endothermic, meaning they have the metabolic ability to internally regulate and maintain a constant, warm body temperature regardless of their environment.
Question 13 Discuss
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Which of the following researchers observed densely stained reticular structures surrounding the nucleus (Hint: Figure)?

A
William Harvey
B
Francis Crick
C
Camillo Golgi
D
Louis Pasteur

Answer & Explanation

Correct Option: C

In 1898, Italian physician Camillo Golgi discovered the cellular organelle now known as the Golgi apparatus by keenly observing densely stained reticular networks near the nucleus of nerve cells.
Question 14 Discuss
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Which among the following is NOT a classification criterion of drugs?

A
Chemical structure
B
Molecular target
C
Behavioural condition
D
Pharmacological effect

Answer & Explanation

Correct Option: C

In pharmacology, drugs are systematically classified based on chemical structure, molecular targets, or specific therapeutic effects, rather than subjective behavioral conditions.
Question 15 Discuss
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Identify a spiral-shaped bacteria.

A
Spirillum
B
Bacillus
C
Coccus
D
Vibrio

Answer & Explanation

Correct Option: A

Spirillum fundamentally refers to a distinct genus of Gram-negative bacteria that are easily identified by their rigid, helical, or spiral shape.
Question 16 Discuss
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How many chambers are there in the heart of fishes?

A
Four
B
Three
C
One
D
Two

Answer & Explanation

Correct Option: D

Fishes natively possess a simple two-chambered heart consisting of one atrium to cleanly receive venous blood and one robust ventricle to pump it towards the gills.
Question 17 Discuss
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Which of the following statements best defines the monoecious?

A
A plant having both male and female reproductive organs on the same individual
B
A flower with dithecous
C
A flower with gynoecium only
D
A flower with androecium only

Answer & Explanation

Correct Option: A

Monoecious plant species uniquely possess both male and female reproductive structures on the exact same individual organism, heavily facilitating potential self-pollination.
Question 18 Discuss
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Which of the following characteristics is NOT of Aves?

A
Presence of teeth
B
Feathers
C
Hollow bones
D
Warm-bloodedness

Answer & Explanation

Correct Option: A

Modern birds (Aves) completely lack teeth; they evolved lightweight, toothless beaks instead of heavy toothed jaws to significantly improve the biomechanics of flight.
Question 19 Discuss
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What are the five Fs of indirect transmission?

A
Flies, fingers, fomites, food and fluid
B
Fruit, fingers, flu, food and fluid
C
Flies, fingers, friends, food and fruit
D
Flies, fingers, fomites, food and fruit

Answer & Explanation

Correct Option: A

The 'Five Fs' model classically outlines the major pathways for the rapid transmission of fecal-oral infectious diseases: flies, fingers, fomites, food, and fluids.
Question 20 Discuss
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By which of the following methods do red algae reproduce?

A
Grafting
B
Cutting
C
Micropropagation
D
Fragmentation

Answer & Explanation

Correct Option: D

Red algae commonly reproduce vegetatively through a simple process known as fragmentation, where a severed piece of the thallus readily grows into a completely new organism.
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