NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology: Questions 475 - 478 of 3511

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Question number: 475

» Genetics and Evolution » Heredity and Variation » Down's Syndrome, Turner's and Klinefelter's Syndromes

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MCQ▾

Question

An abnormal male child is born to normal parents. This child shows a short neck, stubby hands, slanting eyes, permanently open mouth with projection upper lip and short stature. This abnormality can be attributed to

Choices

Choice (4) Response

a.

An extra chromosome in the 21st pair of autosomes

b.

An extra X chromosome

c.

Absence of X chromosome leading to a total of 45 chromosomes instead of the normal 46.

d.

An extra Y chromosome

Question number: 476

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

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Question

In Pinus seeds, there are

Choices

Choice (4) Response

a.

one cotyledons

b.

many cotyledons

c.

Two cotyledons

d.

fleshy cotyledons

Question number: 477

» Plant Physiology » Photosynthesis » Pigments Involved in Photosynthesis

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Question

Blackman demonstrated that increasing illumination increased the photosynthetic rate up to a point when CO2 becomes limiting. If light was not limiting, temperature becomes limiting. Emerson found that maximum CO2 fixation could be achieved with brief flashes of light. Mark the correct statement in the following.

Choices

Choice (4) Response

a.

The trapping of light by chloroplast can occur only if CO2 is present.

b.

Photosynthesis consists of a light and dark reaction.

c.

The trapping of light by chloroplast is temperature dependent.

d.

Only one factor can be limited in photosynthesis.

Question number: 478

» Biotechnology and Its Applications » Application of Biotechnology in Health and Agriculture

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Question

Which one of the micro-organism is used for production of citric acid in industries?

Choices

Choice (4) Response

a.

Rhizopus nigricans

b.

Aspergillus niger

c.

Lactobacillus bulgaricus

d.

Penicillium citrinum