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

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

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

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

An acromian process is characteristically found in the

• pelvic girdle of mammals

• skull of frog

• pectoral girdle of mammals

• sperm of mammals

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

• pinocytic vesicles

• phagocytic vesicles

• zymogen granules

• micro-villi

In contrast to annelids the platyhelminthes show

• radial symmetry

• presence of pseudocoel

• bilateral symmetry

• absence of body cavity

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

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

Secretin and cholecystokinin are digestive hormones. They are secreted in

• oesophagus

• ileum

• duodenum

• pyloric stomach