Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

Which of the following does not match ?

  • Pancreas - Glisson's capsule

  • Antigen - Antibody

  • Thyroid - Goitre

  • Enzyme - Substrate


A.

Pancreas - Glisson's capsule

Glisson capsule is found in liver not in pancreas.The functional unit of liver is lobule. Glisson's capsule is thin layer of connective tissue separating the lobules.


12.

Tongue is under control of :

  • trigeminal nerve

  • facial nerve

  • automatic nervous system

  • glossopharyngeal nerve


B.

facial nerve

Facial nerve is a mixed cranial nerve which is divided into two branches. It carries response impulses to muscles of tongue and lower jaw.


13.

Which of the following does not play a role in blood coagulation ?

  • Vitamin K

  • Vitamin D

  • Calcium ions

  • Fibrinogen


B.

Vitamin D

Vitamin- D has no role in blood coagulation. Although, Vitamin- K, Calcium ions and fibrinogen plays an important role in coagulation of blood.


14.

The peculiar pungent smell of cockroach is produced by the secretions of :

  • pheromones

  • flame cells

  • abdominal glands

  • cervical glands


A.

pheromones

Pheromones are the secretion of small amount of chemical substances leading to specific physiological or behavioural responses in other members of the same species. They are mainly used to induce mating.


15.

The presence of arginase confirms that :

  • urea cycle is operating

  • urea cycle may be operating

  • arginine is being converted into ornithine

  • arginine is being converted into citrulline


C.

arginine is being converted into ornithine

During urea cycle, cytosolic enzyme arginase cleaves arginine to yield urea and ornithine. Ornithine is transported into the mitochondria in order to initiate another round of urea cycle.

Enzymes used in urea cycle are

  1. Carbamoyl phosphate synthase
  2. Ornithine carbamoyltransferase
  3. Arginosuccinate synthase
  4. Arginosuccinate lyase
  5. Arginase


16.

Glycolysis occurs in :

  • cytoplasm

  • nucleus

  • mitochondria

  • both 'a' and 'c


A.

cytoplasm

Glycolysis means splitting of glucose. It occurs in the cytoplasm of the cell and yields a small amount of energy and two molecules of pyruvate. It is a common step between aerobic and anaerobic respiration.


17.

Intercellular communication in multicellular organism occurs through :

  • digestive system only

  • respiratory system only

  • nervous system only

  • both nervous and endocrine system


D.

both nervous and endocrine system

Animals have two systems of co-ordination, namely, nervous system and endocrine system.

Neurons are the basic structural and functional units of the nervous system. They spread thoughout the organism forming a complex communication network.

Endocrine system releases hormones for intercellular communication.


18.

In a vertebrate which germ layer forms the skeleton muscles ?

  • Ectoderm

  • Endoderm

  • Mesoderm

  • Both 'a' and 'c'


C.

Mesoderm

In vertebrates skeletal muscles are mesodermal in origin.


19.

The amount of bile released in proportion to the amount of:

  • fat in meal

  • protein in meal

  • carbohydrate in meal

  • all of the above


A.

fat in meal

Bile is secreted by liver and is stored in the gall bladder. Sodium taurocholate and Sodium glycocholate are the two salts present in human bile. Emulsification of fat takes place through these bile salts. Therefore, the amount of bile will release in proportion to the amount of fat in meal.


20.

Hypersecretion of growth hormone in the period of growth lead to :

  • acromegaly

  • cushing syndrome

  • midgets

  • cretinism


A.

acromegaly

Acromegaly is caused by the hypersecretion of growth hormones or somatotrophic hormones during adult phase. This type of patient has a gorilla like appearance with huge hands and legs.

Cushing syndrome is caused by overproduction of ACTH or adrenocorticotrophic hormone.

Deficiency of growth hormone causes dwarfism. People suffering from this disease are very small (midget).

Cretinism refers to hyperthyroidism in an infant or child. It is an iodine deficiency syndrome.