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Question 2516

Intestinal bacteria synthesizes which vitamin in the human body?

AVitamin A

BVitamin C

CVitamin D

DVitamin K

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D. Vitamin KExplanation: Vitamin K is produced by gut bacteria (Escherichia coli) in the large intestine. It plays a vital role in the synthesis of prothrombin, a protein essential for normal blood clotting. Although some of it is obtained from food (like leafy vegetables), intestinal bacteria supply a significant portion of the body’s requirement.

Question 2515

Sugarcane is a type of

Acreeper

Bshrub

Cgrass

Dtree

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C. grassExplanation: Sugarcane (Saccharum officinarum) is a tall, jointed, perennial grass belonging to the family Poaceae. It has thick stems rich in sucrose, which is extracted to produce sugar. The plant reproduces mainly through stem cuttings (vegetative propagation). Its structure and growth habit are similar to other grasses like maize and bamboo.

Question 2514

Which wave is being used by common TV remote control ?

ARadio waves

BMicro waves

CInfrared waves

DUltrasonic waves

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C. Infrared wavesExplanation not yet available.

Question 2513

The purest form of iron is

AWhite cast iron

BGrey cast iron

CWrought iron

DSteel

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C. Wrought ironExplanation not yet available.

Question 2365

Which of the following is a communicable disease?

AMeasles

BScurvy

CAsthma

DDiabetes

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A. MeaslesExplanation: Measles is a highly contagious viral disease caused by the measles virus (a member of the Paramyxovirus group). It spreads through droplets released when an infected person coughs or sneezes. Symptoms include fever, cough, rash, and watery eyes. Other diseases listed — scurvy, asthma, and diabetes — are non-communicable as they do not spread from person to person.

Question 2363

Which cells in our body are popularly called 'soldiers' of the human body?

AEosinophils

BWhite blood cells

CRed blood cells

DBasophils

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B. White blood cellsExplanation: White Blood Cells (WBCs), also known as leukocytes, act as the body’s defense system. They protect the body against pathogens such as bacteria, viruses, and fungi. Different types of WBCs — like lymphocytes, monocytes, neutrophils, eosinophils, and basophils — have specialized roles in immunity. Because they “fight” infections, they are popularly called the ‘soldiers of the human body.’

Question 2362

The amount of light entering into eye can be controlled and regulated by ___________ .

ASclera

Bcornea

Cpupil

Dretina

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C. pupilExplanation: The pupil is the central opening in the iris that regulates the entry of light into the eye. In bright light, the iris contracts, making the pupil smaller (a process called constriction), while in dim light, it enlarges (known as dilation). This automatic adjustment, known as the pupillary reflex, helps protect the retina from excessive light and ensures clear vision in varying light condit

Question 2356

Which gas in its solid state is also known as dry ice?

ANitrogen

BCarbon dioxide

COxygen

DHydrogen

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B. Carbon dioxideExplanation not yet available.

Question 2355

J J Thomson received the Nobel Prize in Physics for the discovery of ________.

AProtons

BElectrons

CNeutrons

DPositrons

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B. ElectronsExplanation not yet available.

Question 2326

Kidney disease in man is caused by the pollutant

ACadmium

BIron

CCobalt

DCarbon

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A. CadmiumExplanation: Cadmium (Cd) is a toxic heavy metal released from industrial waste, batteries, and mining processes. When it enters the food chain (especially through contaminated rice or water), it accumulates in the body and affects the kidneys, causing protein loss in urine and kidney failure. It is also associated with Itai-Itai disease in Japan, characterized by kidney damage and brittle bones.

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Science

Intestinal bacteria synthesizes which vitamin in the human body?

Sugarcane is a type of

Which wave is being used by common TV remote control ?

The purest form of iron is

Which of the following is a communicable disease?

Which cells in our body are popularly called 'soldiers' of the human body?

The amount of light entering into eye can be controlled and regulated by ___________ .

Which gas in its solid state is also known as dry ice?

J J Thomson received the Nobel Prize in Physics for the discovery of ________.

Kidney disease in man is caused by the pollutant

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