Physiology of Digestion

Q.

How do enzymes lower the activation energy?

Q.

Statement 1: Bile juice is yellowish in color.

Statement 2: Bile has certain pigments produced by the breakdown of the dead and worn-out red blood cells.

1. Both statements are true. Statement 2 is the correct explanation of Statement 1

2. Both statements are true. But Statement 2 is not the correct explanation of Statement 1.

3. Statement 1 is true. Statement 2 is false.

4. Statement 1 is false. Statement 2 is true.

Q. Fats provide us with quick and instant energy.

1. False
2. True

Q.

In the process of digestion, the enzymes at location 'X' and location 'Y' are such that 'X' converts proteins into protease and 'Y' converts peptones into peptides. Identify X and Y.

1. Chymotrypsin and pepsin

2. Ptyalin and pepsin

3. Pepsin and trypsin

4. trypsin and dipeptidase

Q.

Question 12

While using iodine in the laboratory, some drops of iodine fell on Paheli's socks and some fell on her teacher's saree. The drops of iodine on the saree turned blue-black while their colour did not change on the socks. What can be the possible reason?

Q. Ptyalin enzyme is secreted by

1. Salivary glands
2. Mouth
3. Oesophagus
4. Stomach

Q. During digestion, proteins are converted to _____(i)_____ and fats are converted to _______(ii)_______.

1. (i) glucose, (ii) fatty acids
2. (i) amino acids, (ii) glycogen
3. (i) fatty acids, (ii) amino acids
4. (i) amino acids, (ii) fatty acids

Q. Which one of the following is not involved in the digestion of food?

Q. Germs entering the body along with food are killed in alimentary canal where pH is

1. 7
2. 3
3. 10
4. 11

Q. What are the end products of digestion?

1. Proteins – Amino acids; Carbohydrates – Maltose; Fats – Fatty acids and Glycerol
2. Proteins – Amino acids; Carbohydrates – Lactose; Fats – Fatty acids and Glycerol
3. Proteins – Amino acids; Carbohydrates – Sucrose; Fats – Fatty acids and Glycerol
4. Proteins – Amino acids; Carbohydrates – Glucose; Fats – Fatty acids and Glycerol

Q. The process of breakdown of complex food substances into simpler absorbable forms is called ____.

1. digestion
2. ingestion
3. absorption
4. excretion

Q. Which among the following protects the inner lining of stomach?

1. Gastric juice
2. Mucus
3. Bile
4. Saliva