General Science Jkssb Biology Set 1 Mcqs (605 MCQs)

Question 91 Discuss

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In the case of reptiles, their heart is not properly divided in to four chambers i.e., it consists of two auricles and an incompletely divided ventricle. Which of the following is an example of a reptile having a four chambered heart?

A

Lizard

B

Snake

C

Crocodile

D

Turtles

Answer & Explanation

Correct Option: C

Unlike most reptiles that possess a three-chambered heart, crocodilians have evolved a fully divided four-chambered heart that completely separates oxygenated and deoxygenated blood.

Question 92 Discuss

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All living organisms on the Earth are made up of carbon compounds. Many years ago, dead and buried plants started slowly modifying into coal under high temperature and high pressure. This process is called:

A

carbonization

B

composting

C

black gold formation

D

peat formation

Answer & Explanation

Correct Option: A

Carbonization is the slow, millions-of-years-long geological process where buried dead plant matter is converted into solid, carbon-rich coal under immense subterranean heat and pressure.

Question 93 Discuss

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Which of the following communicable diseases is caused by bacteria?

A

Tuberculosis

B

Malaria

C

COVID-19

D

Ringworm

Answer & Explanation

Correct Option: A

Tuberculosis is a highly communicable and historically deadly respiratory disease caused by the bacterium Mycobacterium tuberculosis.

Question 94 Discuss

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The transportation mechanism in cells by which food or other useful molecules from the outside are carried inside the cell is known as .

A

Endocytosis

B

Osmosis

C

Fusion

D

Exocytosis

Answer & Explanation

Correct Option: A

Endocytosis is the fundamental cellular process where a cell actively engulfs external substances, bringing them inside by forming a protective vesicle from its own cell membrane.

Question 95 Discuss

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Which of the following options correctly matches column-A and column-B? Column-A (Food component) Column-B (Enzyme involved in digestion) i. Protein a. Amylase ii. Carbohydrates b. Lipase iii. Fats c. Trypsin

A

i-a, ii-b, iii-c

B

i-a, ii-c, iii-b

C

i-b, ii-a, iii-c

D

i-c, ii-a, iii-b

Answer & Explanation

Correct Option: D

In the human digestive system, the enzyme trypsin breaks down proteins, amylase digests carbohydrates, and lipase is strictly responsible for the breakdown of fats.

Question 96 Discuss

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What solution should be used to test for the presence of starch in food?

A

Talc solution

B

Ethylene glycol - water solution

C

Iodine solution

D

Magnesium solution

Answer & Explanation

Correct Option: C

Iodine solution is the classic laboratory indicator for starch, safely turning a distinct blue-black color when it chemically reacts with the complex carbohydrate.

Question 97 Discuss

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The Krebs cycle of aerobic respiration is carried out within which of the following cell organelles?

A

Lysosome

B

Nucleus

C

Mitochondria

D

Spirogyra

Answer & Explanation

Correct Option: C

The Krebs cycle, a critical sequence in cellular respiration, takes place entirely within the mitochondrial matrix, where it generates usable energy for the cell.

Question 98 Discuss

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The microscopic channels, which traverse the cell walls of plant cells and some algal cells, transport and enabling communication between them is called:

A

ribosomes

B

plasmodesmata

C

lysosomes

D

desmosomes

Answer & Explanation

Correct Option: B

Plasmodesmata are narrow, specialized channels that cross the thick cell walls of plant cells, directly connecting their cytoplasm to allow for intercellular transport and rapid communication.

Question 99 Discuss

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Which specific chemical can be applied to achieve staining of chromosomes?

A

Acetocarmine

B

Methanol

C

Hydrochloric acid

D

Ethanol

Answer & Explanation

Correct Option: A

Acetocarmine is a standard biological stain uniquely formulated to color nucleic acids deeply, making compacted chromosomes clearly visible under a light microscope.

Question 100 Discuss

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Which of the following are functions of the cell membrane? A) Selective permeability B) Cell signaling C) Protein synthesis D) Cell protection

A

Only A, B and D

B

Only A, B and C

C

Only C and D

D

Only A and C

Answer & Explanation

Correct Option: A

The cell membrane acts as a selectively permeable barrier, protects the cellular contents, and facilitates chemical signaling, whereas protein synthesis is strictly handled by ribosomes.

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Practice Questions

In the case of reptiles, their heart is not properly divided in to four chambers i.e., it consists of two auricles and an incompletely divided ventricle. Which of the following is an example of a reptile having a four chambered heart?

Answer & Explanation

All living organisms on the Earth are made up of carbon compounds. Many years ago, dead and buried plants started slowly modifying into coal under high temperature and high pressure. This process is called:

Answer & Explanation

Which of the following communicable diseases is caused by bacteria?

Answer & Explanation

The transportation mechanism in cells by which food or other useful molecules from the outside are carried inside the cell is known as .

Answer & Explanation

Which of the following options correctly matches column-A and column-B? Column-A (Food component) Column-B (Enzyme involved in digestion) i. Protein a. Amylase ii. Carbohydrates b. Lipase iii. Fats c. Trypsin

Answer & Explanation

What solution should be used to test for the presence of starch in food?

Answer & Explanation

The Krebs cycle of aerobic respiration is carried out within which of the following cell organelles?

Answer & Explanation

The microscopic channels, which traverse the cell walls of plant cells and some algal cells, transport and enabling communication between them is called:

Answer & Explanation

Which specific chemical can be applied to achieve staining of chromosomes?

Answer & Explanation

Which of the following are functions of the cell membrane? A) Selective permeability B) Cell signaling C) Protein synthesis D) Cell protection

Answer & Explanation

General Science

Topics

Browse Topics

Practice Questions

In the case of reptiles, their heart is not properly divided in to four chambers i.e., it consists of two auricles and an incompletely divided ventricle. Which of the following is an example of a reptile having a four chambered heart?

Answer & Explanation

All living organisms on the Earth are made up of carbon compounds. Many years ago, dead and buried plants started slowly modifying into coal under high temperature and high pressure. This process is called:

Answer & Explanation

Which of the following communicable diseases is caused by bacteria?

Answer & Explanation

The transportation mechanism in cells by which food or other useful molecules from the outside are carried inside the cell is known as .

Answer & Explanation

Which of the following options correctly matches column-A and column-B? Column-A (Food component) Column-B (Enzyme involved in digestion) i. Protein a. Amylase ii. Carbohydrates b. Lipase iii. Fats c. Trypsin

Answer & Explanation

What solution should be used to test for the presence of starch in food?

Answer & Explanation

The Krebs cycle of aerobic respiration is carried out within which of the following cell organelles?

Answer & Explanation

The microscopic channels, which traverse the cell walls of plant cells and some algal cells, transport and enabling communication between them is called:

Answer & Explanation

Which specific chemical can be applied to achieve staining of chromosomes?

Answer & Explanation

Which of the following are functions of the cell membrane? A) Selective permeability B) Cell signaling C) Protein synthesis D) Cell protection

Answer & Explanation

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