Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Match the parts of the human brain with their functions.

Column I Column II
A. Cerebrum 1. Controls the pituitary
B. Cerebllum 2. Controls vision and hearing
C. Hypothalamus 3. Controls the rate of heart beat
D. Midbrain

4. Seat of intelligence

5. Maintains body posture

  • A - 5; B - 4; C - 2; D - 1

  • A - 4; B - 5; C - 2; D - 1

  • A - 5; B - 4; C - 1; D - 2

  • A - 4; B - 5; C - 1; D - 2


D.

A - 4; B - 5; C - 1; D - 2

Column I Column II
A. Cerebrum 4. Seat of intelligence
B. Cerebellum 5. Maintains body posture
C. Hypothalamus 1. Controls the pituitary
D. Midbrain  2. Controls vision and hearing

2.

Glands in a vertebrate body originate from

  • ectoderm, mesoderm and endoderm

  • ectoderm and endoderm

  • mesoderm

  • ectoderm


D.

ectoderm

Glands in a vertebrate body originate from ectoderm. Glands are the modification of epidermis of skin. The ectoderm also gives rise to the neural crest (ganglion, sensory cell, etc) and neural tube (brain, spinal cord etc).


3.

Function of SER is

  • protein metabolism

  • lipid metabolism

  • carbohydrate metabolism

  • catabolic activity


B.

lipid metabolism

SER or Smooth Endoplasmic Reticulum is an organelle present in both animals as well as plants. The function of SER is lipid metabolism. It does not contain ribosomes and is specialised to synthesize lipids and steroids.

RER or Rough Endoplasmic Reticulum is attached with ribosomes on its surface and its main function is in protein synthesis.


4.

Ornithorhynchus is a connecting link between

  • fishes and amphibians

  • Annelida and Arthropoda

  • Annelida and Mollusca

  • reptiles and mammals


D.

reptiles and mammals

Ornithorhynchus is a connecting link between reptiles and mammals. They bear hair and mammary glands (like-mammals), but also possess some of the reptilian characteristics such as egg laying, presence of cloaca and some skeletal similarities.


5.

Patella (knee cap) is an example of

  • replacing bones

  • sesamoid bones

  • flat bones

  • irregular bones


B.

sesamoid bones

Sesamoid bones are small rounded masses of bones formed in tendons at the joints, where they are subjected to great pressure. e.g., patella, fabellae.


6.

Which of the following branch of biology is correctly matched?

  • Ornithology - Study of mammals

  • Herpetalogy - Study of molluscs

  • Ophiology - Study of snakes

  • Therology - Study of birds


C.

Ophiology - Study of snakes

Ophiology is the branch of zoology that deals with snales.

Ornithology is a branch of zoology that concerns the study of birds. 

Herpetology is the branch of zoology concerned with the study of amphibians and reptiles.

Therology is the study or science of mammals.

Malacology is the branch of zoology that deals with molluscs.


7.

Which of the following is correctly matched?

  • Enlarged P-wave - Acute myocardial infarction

  • QRS wave flat - Atherosclerotic heart disease

  • Enlarged Q and A - wave-Myocardial infarction

  • Elevated S-T - Enlargement of atria


C.

Enlarged Q and A - wave-Myocardial infarction

Electrocardiography is the process of producing an electrocardiogram (ECG). It records the electrical activity of heart. It detects tiny electrical signals that make heart pump blood around the body.

Enlarged Q and R waves indicates a myocardial infarction. The S-T segment is elevated in acute myocardial infarction and depressed when the heart muscle receives insufficient oxygen. Enlargement of the P-wave indicates enlargement of the atria. T-wave is flat when the heart muscles receive insufficient oxygen is in atherosclerotic heart disease.


8.

Which of the following helps in the absorption of Vitamin-B12?

  • Pepsin

  • Bile juice

  • Castle's intrinsic gastric factor

  • Cholecy stokinin


C.

Castle's intrinsic gastric factor

Castle's intrinsic gastric factor is secreted by the parietal cells of the stomach. It helps in absorption of Vitamin- B12.


9.

A fish introduced into a water body to control mosquito population is

  • Gambusia

  • Labeo

  • Notopterus

  • Fistularia


A.

Gambusia

Gambusia is a small fish that is introduced into a water body to control mosquito population. It is a fresh water fish. It feeds on larvae of mosquitoes.


10.

If a haemophilic carrier female marries a normal man, the chances are that

  • all the daughters will have haemophilia

  • 50% of the daughters will have haemophilia

  • 50% of the sons will have haemophilia

  • all the sons will have haemophilia


C.

50% of the sons will have haemophilia

Haemophilia is an inherited bleeding disorder where the blood does not clot properly. It is caused when blood does not have enough clotting factor.

In the above situation, 50% of the sons will have haemophilia. The cross is as given below