Which one of the following is a matching pair of a substrate and its particular digestive enzyme? 

1. Maltose     - Maltase

2. Lactose     - Renin     

3. Starch       - Steapsin

4. Casein       - Chymotrypsin

Most of the digestion occurs in 

1. rectum

2. stomach

3. duodenum

4. small intestine

Which one of the following vitamin can be synthesised by bacteria inside the gut? 

1. B

2. D

3. C

4. Both b and c

The richest sources of vitamin-B₁₂ are 

1. goat's liver and Spirulina

2. chocolate and green gram

3. rice and hen's egg

4. carrot and chicken's breast

Which one of the following pairs of food components in humans reaches the stomach totally undigested? 

1. Protein and starch

2. Starch and fat

3. Fat and cellulose

4. Starch and cellulose

Lactose is composed of

1. glucose + fructose

2. glucose + glucose

3. glucose + galactose

4. fructose + galactose

Which of the following pair is characterised by swollen lips, thick pigmented skin of hands and legs and irritability ?

1. Thiamine      ---- Beri-Beri

2. Protein         ---- Kwashiorkor

3. Nicotinamide ---- Pellagra

4. Iodine          ---- Goitre

Fructose is absorbed into the blood through mucosa cells of intestine by the process called 

1. active transport

2. facilitated transport

3. simple diffusion

4. co-transport mechanism

The haemorrhagic disease of new born is caused due to the deficiency of 

1. vitamin-A

2. vitamin-B₁

3. vitamin-B₁₂

4. vitamin-K

In a person of advanced age, the hair become thinner gradually. It happens because of decrease in

1. synthesis of glucose

2. synthesis of proteins

3. energy availability

4. blood supply