NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology: Questions 194 - 198 of 3511

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Question number: 194

» Plant Physiology » Transport in Plants » Guttation

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MCQ▾

Question

Stomata open during day time because the guard cells

Choices

Choice (4) Response

a.

Help in gaseous exchange.

b.

Photosynthesize and produce osmotically active sugars or organic acids.

c.

Are thin-walled.

d.

Are bean shaped.

Question number: 195

» Biotechnology and Its Applications » Human Insulin and Vaccine Production

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Appeared in Year: 2003

MCQ▾

Question

Genetically engineered human insulin is called

Choices

Choice (4) Response

a.

Hybridoma

b.

Haematin

c.

Hybrid

d.

Humulin

Question number: 196

» Cell Structure and Function » Chemical Constituents of Living Cells » Biomolecules-Structure and Function

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MCQ▾

Question

Sucrose, a common table sugar, is composed of

Choices

Choice (4) Response

a.

Fructose + galactose

b.

Glucose + fructose

c.

Glucose + galactose

d.

Question does not provide sufficient data or is vague

Question number: 197

» Human Physiology » Neural Control and Coordination » Generation and Conduction of Nerve Impulse

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MCQ▾

Question

Which one of the following statement in regard to nerve activity is true?

Choices

Choice (4) Response

a.

Information across the synaptic cleft is transmitted by means of a chemical neurotransmitter in small vesicle.

b.

In tetanus the excitatory impulse to muscles are inhibited leading to lock jaw.

c.

Combination of neurotransmitter with receptor site changes membrane potential without changing membrane potentiality.

d.

The synaptic cleft does not prevent direct propagation of action potential from presynaptic neuron to post synaptic cell.

Question number: 198

» Human Physiology » Neural Control and Coordination » Endocrine System-Hypothalamus, Pituitary, Pineal, Thyroid, Parathyroid, Adrenal, Pancreas, Gonads

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MCQ▾

Question

Which one of the following statement about sex hormones is correct?

Choices

Choice (4) Response

a.

The progesterone produced by corpus luteum is biologically different from the one produced by placenta.

b.

Testosterone is produced by Leydig cells under the influence of luteinizing hormone (LH).

c.

Progesterone is secreted by corpus luteum and soften ligaments during child birth

d.

Estrogen is secreted by both Sertoli cells and corpus luteum.