Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

Protein synthesis in an animal cell occurs

  • only on the ribosomes present in cytosol

  • on ribosomes present in cytoplasm as well as in mitochondria

  • only on ribosomes attached to the nuclear envelope and endoplasmic reticulum

  • on ribosomes present in the nucleolus as well as in cytoplasm


12.

The ability of the venus flytrap to capture insects is due to

  • chemical stimulation by the prey

  • a passive process requiring no special ability on the part of the plant

  • specialized "muscle-like" cells

  • rapid turgor pressure changes


13.

One of the examples of the action of the autonomous nervous system is

  • knee-jerk response

  • pupillary reflex

  • swallowing of food

  • peristalsis of the intestines


14.

Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter

  • acetylcholine

  • norepinephrine

  • dopamine

  • GABA


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15.

An acromian process is characteristically found in the

  • pelvic girdle of mammals

  • skull of frog

  • pectoral girdle of mammals

  • sperm of mammals


C.

pectoral girdle of mammals

Acromion process is a bony process on the scapula. Scapula is a large triangular flat bone situated in the dorsal part of the thorax between the second and seventh ribs. 

The acromion is a continuation of the scapular spine, and hooks over anteriorly. It articulates with the clavicle to form the acromioclavicular joint.


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16.

Epithelial cells ofthe intestine involved in food absorption have on their surface

  • pinocytic vesicles

  • phagocytic vesicles

  • zymogen granules

  • micro-villi


17.

In contrast to annelids the platyhelminthes show

  • radial symmetry

  • presence of pseudocoel

  • bilateral symmetry

  • absence of body cavity


18.

Which of the following pairs is correctly matched?

  • Cartilaginous joint - Skull bones

  • Hinge joint - Between vertebrae

  • Fibrous joint - Between phalanges

  • Gliding joint - Between zygapophyses of the successive vertebrae


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19.

Haemophilia is more commonly seen in human males than in human females because

  • this disease is due to an X- linked dominant mutation

  • a greater proportion of girls die in infancy

  • this disease is due to an X- linked recessive mutation

  • this disease is due to a Y- linked recessive mutation


20.

Secretin and cholecystokinin are digestive hormones. They are secreted in

  • oesophagus

  • ileum

  • duodenum

  • pyloric stomach


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