Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of the following act as an antigen, but do not induce antibody production?

  • Haustra

  • Histones

  • Haptens

  • None of these


C.

Haptens

The hapten is a low weight molecular that can be made immunogenic conjugation to a suitable carrier.


2.

Vitamin-B12 is absorbed primarily in the

  • Stomach

  • Duodenum

  • Jejunum

  • ileum


D.

ileum

The parietal cells of gastric mucosa secrete certain intrinsic factors. This help in the absorption of Vitamin- B12. It is propelled along the small intestine to the terminal ileum and is absorbed by an active transport process.


3.

The strongest muscle in the human is

  • Biceps

  • Gluteus maximus

  • Stapedius

  • Masseter


D.

Masseter

The masseter is a thick rectangular muscle in the cheek, one of the four muscles of mastication.


4.

Carotid labyrinth contains

  • Olfactory receptors

  • Baroreceptors

  • Chemoreceptors

  • Phonoreceptors


B.

Baroreceptors

Carotid labyrinth or a gland is found at the base of internal carotid. It is probably a sense organ containing baroceptors that control blood pressure in the human body.


5.

Which of the following animals possess non-elastic lungs with elastic air sacs connected to them?

  • Reptiles

  • Birds

  • Amphibians

  • Mammals


B.

Birds

It is the feature of birds (Aves) to have non-distensible lungs continuous with thin elastic air sacs.


6.

Parkinsonism is related with

  • Brain

  • Spinal Nerve

  • Cranial Nerves

  • All of these


A.

Brain

Parkinsonism is naming after James Parkinson, is caused by the various lesion in the extra-pyramidal motor system of the brain. It frequently occurs in old persons or in the patients, which are treated with antipsychotic lungs.


7.

The faster breathing in high fever is due to the

  • Additional requirement of O2 for the invader germs

  • High temperature of the body

  • Mental worry of a patient

  • Loss of appetite


B.

High temperature of the body

Fever increases metabolic activity by 7% per degree Celsius increasing the requirement of O2. It increases the rate of breathing.


8.

If the threshold for hearing increasing 1000 times, the hearing loss is

  • 40 decibels

  • 50 decibels

  •  60 decibels

  • None of these


D.

None of these

A decibel is a measure of the ratio between two sound stimuli. The decibel level of a sound that a normal human can hear and is calculated using the formula.

Intensity (in decibels) = 10 x log (sound/threshold)

Therefore, the intensity of a sound that is 1000 times, thresh hold is 30 Decibels.


9.

Epiphyseal plates at the extremities of long bones help in

  • Bone moulding

  • Elongation of bone

  • Bone formation

  • Formation of Haversian Canal


B.

Elongation of bone

Epiphyseal plate is found between diaphysis and epiphysis. It contributes to the elongation of bone during the growth period.


10.

Which hormone produces the calorigenic effect?

  • Thyroxine

  • FSH

  • Insulin

  • All of these


A.

Thyroxine

Calorigenic effect refers to the substance or process that produces heat or energy or that increase the consumption of O2