Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

Space in the jaw bone unoccupied by teeth is called

  • Dentine

  • diastema

  • enamel

  • crown


B.

diastema

Diastema is the gap that separates the big teeth from the grinding teeth in herbivores. It creates a space in which food can be held ready for the grinding action of the teeth. This space is filled with large canine teeth in carnivores.


12.

Yellow bone marrow is found specially in the medullary cavity

  • Long bones

  • Spongy bones

  • Short bones

  • All of the above


A.

Long bones

Bone marrow is of two types; red and yellow. The yellow marrow is found especially in the medullary cavity of long bones, while red is in spongy bones.


13.

Achondroplasia is a disease related with the defect in the formation of

  • membrane

  • mucosa

  • bone

  • cartilage


D.

cartilage

Achondroplasia is a defect in the formation of cartilage at the epiphyses of long bones producing a form of dwarfism.


14.

Match the items of column I with column II and choose the correct option from the codes given below.

Column I Column II
A. Neuron 1. Ossein
B. Bone-matrix 2. Nissl’s bodies
C. RBCs of man 3. Antibodies
D. Lymphocytes 4. Non-nucleated

  • A B C D
    4 1 2 3
  •  

    A B C D
    2 1 4 3
  • A B C D
    3 4 1 2
  • A B C D
    2 3 4 1

B.

 

A B C D
2 1 4 3

15.

Identify the correct set, which shows the name of the enzyme from where it is secreted and the substrate upon which it acts.

  • Ptyalin – Intestine – Maltose

  • Ptyalin – Pancreas – Lipid

  • Pepsin – Stomach wall – Caesin

  • Chymotrypsin – Salivary gland – Lactose


C.

Pepsin – Stomach wall – Caesin

Pepsin is released from peptic cells of the gastric gland on the stomach wall and it can digest milk protein casein.

Chymotrypsin is released from the intestine and digest proteins. Ptyalin is released from salivary glands and acts on starch.


16.

Ichthyology is study of

  • Aves

  • Amphibians

  • Reptiles

  • Fishes


D.

Fishes

Study of amphibians and reptiles is called Herpetology.

Study of aves is called Ornithology.

Study of fishes is called Ichthyology.


17.

Endemic goitre is a state of

  • normal thyroid function

  • moderate thyroid function

  • increased thyroid function

  • decreased thyroid function


D.

decreased thyroid function

Goitre is a swelling of the neck due to enlargement of the thyroid gland. This may be due to a lack of dietary iodine, which occurs due to decreases thyroid function, which is necessary for the production of thyroxine hormone.

This was the casue of endemic goitre formerly common in regions, where the people lacked in their diet iodine.


18.

What is another name for the windpipe?

  • Trachea

  • Larynx

  • Oesophagus

  • Lungs


A.

Trachea

At its bottom, the trachea (another name for the windpipe) branches into two tubes called bronchi, which lead into the lungs.

The larynx is the voice box. It is connected to the windpipe. The oesophagus, like the windpipe, is a tube that runs through the neck. The lungs are the ballon like structure in the chest.


19.

Hormone responsible for the secretion of milk after parturition is

  • ACTH

  • LH

  • ICSH

  • Prolactin


D.

Prolactin

Prolactin or luteotrophic hormone or luteotropin is a hormone, synthesised and stored in the anterior pituitary gland, that stimulates milk production after childbirth and also stimulates the production of progesterone by the corpus luteum in the ovary.


20.

What will happen if ligaments are torn?

  • Bone will become unfixed

  • Bone will become fixed

  • Bone less movable at joint and pain

  • Bone will move freely at joint and no pain


C.

Bone less movable at joint and pain

Ligaments join a bone with another bone in movable/ synovial joints. Torn ligaments make a movement at joints very painful and restricted. It heals only after prolonged movement restriction.