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Question 3785

Plasma membrane in eukaryotic cells is made up of:

APhospholipid

BLipoprotein

CPhospholipo-protein

DPhospho-protein

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A. PhospholipidExplanation: The plasma membrane in eukaryotic cells is mainly made up of a phospholipid bilayer arranged in a fluid mosaic model. Each phospholipid molecule consists of a hydrophilic (water-attracting) head and hydrophobic (water-repelling) tails. This arrangement creates a semi-permeable barrier that regulates the movement of substances into and out of the cell. Embedded proteins, cholesterol, and carbohydrates contribute to transport, signaling, and membrane stability.

Question 3784

One of the constitutes of tear gas is:

AEthane

BEthanol

CEther

DChloropicrin

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D. ChloropicrinExplanation not yet available.

Question 3783

A vitamin requires cobalt for its activity. The vitamin is:

AVitamin B12

Bvitamin D

Cvitamin B2

DVitamin A

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A. Vitamin B12Explanation: Vitamin B12, also known as Cobalamin, is the only vitamin that contains a metal ion — cobalt (Co) — at its core. It plays a crucial role in red blood cell formation, DNA synthesis, and proper nervous system function. Deficiency of Vitamin B12 leads to pernicious anemia and neurological disorders. It is found mainly in animal-based foods such as meat, eggs, milk, and fish, and is synthesized by certain bacteria.

Question 3776

What is deposited on iron in the process of galvanisation?

ACopper

BZinc

CTin

DAluminium

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B. ZincExplanation not yet available.

Question 3775

Which of the following metals is the most ductile metal?

AGold

BAluminium

CCopper

DTin

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A. GoldExplanation not yet available.

Question 3750

An instrument used for measuring depth of an ocean is called?

AHydrometer

BHygrometer

CFathometer

DGalvanometer

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A. HydrometerExplanation not yet available.

Question 3749

The SI unit of temperature is

ATemperature

BAmpere

CWatt

DKelvin

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D. KelvinExplanation not yet available.

Question 3734

When pressure is increased, then the melting point of ice:

AIncreases

BDecreases

CRemains unchanged

DDepends on the impurities in the ice

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B. DecreasesExplanation not yet available.

Question 3733

The first nuclear test conducted by India under the code name of "Smiling Buddha" was in the year:

A1973

B1974

C1975

D1976

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B. 1974Explanation not yet available.

Question 3729

A device that is responsible for changing the voltage is:

ATransformer

BEncoder

CDecoder

DTranslator

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A. TransformerExplanation not yet available.

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Science

Plasma membrane in eukaryotic cells is made up of:

One of the constitutes of tear gas is:

A vitamin requires cobalt for its activity. The vitamin is:

What is deposited on iron in the process of galvanisation?

Which of the following metals is the most ductile metal?

An instrument used for measuring depth of an ocean is called?

The SI unit of temperature is

When pressure is increased, then the melting point of ice:

The first nuclear test conducted by India under the code name of "Smiling Buddha" was in the year:

A device that is responsible for changing the voltage is:

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