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 221 Discuss
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What is the primary function of the Golgi apparatus?

A
Lipid production
B
Sorting and packaging of cellular products
C
Protein synthesis
D
Cellular respiration

Answer & Explanation

Correct Option: B

The Golgi apparatus acts as the cell's processing and shipping center. It receives proteins and lipids from the endoplasmic reticulum, modifying, sorting, and packaging them into vesicles for delivery to targeted destinations.
Question 222 Discuss
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The Y-shaped proteinaceous structure produced by the immune cells to defend our body against harmful bacteria and viruses are known as:

A
immunoglobulin
B
amino acids
C
collagen
D
haemoglobin

Answer & Explanation

Correct Option: A

Immunoglobulins, commonly known as antibodies, are specialized, Y-shaped proteins produced by B-cells. They identify and neutralize foreign pathogens like bacteria and viruses by physically binding to specific antigens on their surfaces.
Question 223 Discuss
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Which of the following is INCORRECT about cooking of food?

A
Makes it easier to digest
B
Results in the loss of certain nutrients
C
Destroys vitamin C easily
D
Destroys vitamin D easily

Answer & Explanation

Correct Option: D

Vitamin D is a fat-soluble vitamin that is highly stable and resistant to heat, meaning normal cooking processes do not significantly destroy it. In contrast, water-soluble vitamins like Vitamin C are highly heat-sensitive.
Question 224 Discuss
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Which of the following organisms belong to the Phylum Protozoa?

A
Amoeba, Paramecium, Jelly fish
B
Amoeba, Paramecium, Plasmodium
C
Euglena, Paramecium, Jelly fish
D
Amoeba, Paramecium, Taenia

Answer & Explanation

Correct Option: B

Amoeba, Paramecium, and Plasmodium are all classic examples of single-celled eukaryotic organisms historically classified under the phylum Protozoa. They exhibit animal-like behaviors, such as motility and heterotrophy.
Question 225 Discuss
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The primary function of which globular structure is to produce and assemble the ribosomes of the cell?

A
Chromatin
B
Centriole
C
Peroxisomes
D
Nucleolus

Answer & Explanation

Correct Option: D

The nucleolus is a dense, non-membrane-bound structure found within the cell nucleus. Its primary role is the transcription and processing of ribosomal RNA (rRNA) and its assembly with proteins into ribosomal subunits.
Question 226 Discuss
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Which phylum of the animal kingdom is made up of segmented worms like earthworms?

A
Porifera
B
Nematoda
C
Platyhelminthes
D
Annelida

Answer & Explanation

Correct Option: D

The phylum Annelida comprises segmented worms, including earthworms and leeches. Their bodies are divided into repetitive physical segments called metameres, which allow for advanced mobility and compartmentalized organ functions.
Question 227 Discuss
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What is the function of the endoplasmic reticulum (ER)?

A
Lipid synthesis and detoxification
B
Protein synthesis
C
Energy production
D
DNA replication

Answer & Explanation

Correct Option: A

The smooth endoplasmic reticulum specializes in the synthesis of lipids and the detoxification of metabolic byproducts and drugs. Meanwhile, the rough endoplasmic reticulum is studded with ribosomes specifically for protein synthesis.
Question 228 Discuss
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Which of the following is NOT an animal of Phylum Chordate?

A
Rabbit
B
Snake
C
Frog
D
Earthworm

Answer & Explanation

Correct Option: D

Earthworms belong to the phylum Annelida (segmented worms) and lack a notochord, a dorsal nerve cord, and pharyngeal slits. Chordates, which include all vertebrates like frogs and snakes, possess these defining anatomical features.
Question 229 Discuss
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Which term refers to the increasing concentration of toxins within each successive link in the food chain?

A
Biomagnification
B
Facilitation
C
Denitrification
D
Stratification

Answer & Explanation

Correct Option: A

Biomagnification is the process where persistent, non-biodegradable toxins (like heavy metals or pesticides) progressively accumulate and concentrate as they move up the food chain, severely impacting apex predators.
Question 230 Discuss
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What is the term for a nucleus formed by the fusion of two pronuclei during fertilization?

A
synkaryon
B
eukaryon
C
heterokaryon
D
syncytium

Answer & Explanation

Correct Option: A

A synkaryon is the newly formed diploid nucleus that results from the fusion of the haploid male and haploid female pronuclei during the process of fertilization, marking the completion of the zygote formation.
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