NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology: Questions 479 - 483 of 3511

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Question number: 479

» Genetics and Evolution » Molecular Basis of Inheritance » DNA Replication

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MCQ▾

Question

Semiconservative model of DNA replication was proposed by which workers in eukayotes?

Choices

Choice (4) Response

a.

Taylor, Woods and Huges

b.

Watson and Crick

c.

Nirenberg and Khorana

d.

Messelson and Stahl

Question number: 480

» Reproduction » Sexual Reproduction in Flowering Plants » Pollination-Types, Agencies and Examples

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MCQ▾

Question

Dichogamy which helps in cross pollination is a floral mechanism in which

Choices

Choice (4) Response

a.

Pollen grain is unable to germinate on the stigma of the same flower.

b.

Anther and stigma mature at different times.

c.

Structure of pollen sac and stigma functions as hurdles.

d.

Pollen sac and stigma are at different heights.

Question number: 481

» Plant Physiology » Transport in Plants » Movement of Water, Gases and Nutrients

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Question

The cell wall is permeable and not a semipermeable structure can be best deduced from the passage of water and mineral salts from

Choices

Choice (4) Response

a.

Cortical cells to pericycle.

b.

Soil into periplasmic space of root hairs.

c.

Pericycle to trachea.

d.

Root hairs to cortical cells.

Question number: 482

» Diversity in Living World » Five Kingdom Classification » Protista

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Question

Two species of Amoeba X and Y were kept in fresh water and got adapted. Species X developed contractile vacuole.

Choices

Choice (4) Response

a.

Species Y is marine and X is fresh water.

b.

Species X is marine and Y is fresh water.

c.

X and Y are marine species.

d.

X and Y are fresh water.

Question number: 483

» Diversity in Living World » Five Kingdom Classification » Plant Group - Pteridophytes

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MCQ▾

Question

Which of the following helps in coal formation?

Choices

Choice (4) Response

a.

Gymnosperm

b.

Pteridophytes

c.

Bacteria

d.

Archaebacteria