Cobalt is present in the molecule of

1. vitamin B₆

2. vitamin B₁₂

3. vitamin B₂

4. vitamin B₁

During digestion, before the action of lipase, fat is emulsified by:-

1. ergosterols

2. phospholipids

3. lipoproteins

4. digitonin

Sea fish are good source of

1. iron

2. iodine

3. potassium

4. all the above

Which of the folowing teeth are lophodont ?

1. Incisor and canine

2. Canine and premolar

3. Premolar and molar

4. Premolar and incisor

Which of the following digestive juices has the minimum pH value ?

1. Bile

2. Gastric juice

3. Saliva

4. Pancreatic juice

In adults, curdling of the milk in small intestine occurs due to the action of

1. rennin

2. erypsine

3. trypsin

4. chymotrypsin

The vitamin nicotinamide can be synthesized in our body from.

1. tyrosine

2. tryptophan

3. valinc

4. phenylalanine

Excessive stimulation of vagus nerve in humans may lead to:

1. hoarse voice

2. peptic ulcers

3. efficient digestion of proteins

4. irregular contractions of diaphragm.

Cattle fed with spoilt hay of sweet clover which contains dicumarol

1. are healthier due to a good diet

2. catch infections easily

3. may suffer vitamin K deficiency and prolonged bleeding

4. may suffer from beri beri due to deficiency of B vitamins

Which one of the following pairs of the kind of cells and their secretion is correctly matched ?

(1) Oxyntic cells --- a secretion with pH between 2.0 and 3.0

(2) Alpha cells of islets of Langerhans ---- secretion that decreases blood sugar level

(3) Kupffer cells --- a digestive enzyme that hydrolyses nucleic acids

(4) Sebaceous glands --- a secretion that evaporates for cooling