NEET (National Eligibility cum Medical Entrance Test) Biology: Questions 475 - 478 of 3390

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Question number: 475

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

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

MCQ▾

Question

In Pinus seeds, there are

Choices

Choice (4) Response

a.

many cotyledons

b.

Two cotyledons

c.

fleshy cotyledons

d.

one cotyledons

Question number: 477

» Plant Physiology » Photosynthesis » Pigments Involved in Photosynthesis

MCQ▾

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.

Only one factor can be limited in photosynthesis.

b.

The trapping of light by chloroplast is temperature dependent.

c.

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

d.

Photosynthesis consists of a light and dark reaction.

Question number: 478

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

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Lactobacillus bulgaricus

b.

Aspergillus niger

c.

Rhizopus nigricans

d.

Penicillium citrinum

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