Digestive Juices

Q.

What is emulsification of fats?

Q.

What is the optimal pH of pepsin?

Q.

The contraction of gall bladder is due to

1. Enterogastrone

2. Cholecystokinin

3. Secretin

4. Gastrin

Q.

Where is the sphincter of Boyden located?

Q.

What mechanisms are involved in absorption of digested food and water?

Q.

What is the role of Enterokinase?

Q.

The digestion of all food components is completed by the ____________ juice.

Q.

Identify error in the given statement:

Erepsin changes proteins and peptides into amino acids.

Q.

Why is reabsorption described as a selective process?

Q.

Where does the protein digestion occur?

1. Stomach

2. Ileum

3. Rectum

4. Duodenum

Q.

What is rennin?

Q. Short / Long answer type questions.
Bile juice contains no digestive enzymes, yet it is important for digestion. Why?

Q.

In a school practical, three test tubes, A, B and C were kept in front of a student. “A” has some rice water in it, “B” has egg white in it and “C” has ghee in it. The teacher gave three chemical bottles to the student and asked to pour them into respective test tubes such that those contents can be broken down into simpler forms. ​
[One bottle per test tube must be used]​

• ​Bottle 1 contains an enzyme that is secreted inside the mouth.​

• Bottle 2 contains an enzyme that is secreted by the pancreas​

• Bottle 3 contains an enzyme that is secreted by the stomach.​
  Can you help in choosing the correct chemicals to digest the substances in the test tubes? [3 Marks]

Q.

Give reason for the following
Reabsorption is called as selective reabsorption.

Q.

How do you know if your intestines are blocked?

Q.

Match the following.

$\begin{array}{cc}\text{a) Pepsinogen is secreted by}& \text{I) Liver}\\ \text{b) Trypsin is secreted by}& \text{II) Pancreas}\\ \text{c) Bile is produced in}& \text{III) Gall bladder}\\ \text{d) Bile is stored in}& \text{IV) Gastric glands}\end{array}$

1. $a\to IV,b\to II,c\to I,d\to III$

2. $a\to I,b\to III,c\to II,d\to IV$

3. $a\to IV,b\to III,c\to II,d\to I$

4. $a\to III,b\to II,c\to IV,d\to I$

Q. Which one is not in intestinal juice?

1. Erepsin
2. Maltase
3. HCI
4. Water

Q. Name the major enzymes used in industry and explain their importance.

Q.

What side is your pancreas on?

Q. Which of the following is not secreted by the stomach during digestion?

1. Mucus
2. Pepsinogen
3. HCl
4. Trypsin

Q. Lactase hydrolyses lactose into.

1. Glucose $+$ Glucose
2. Glucose $+$ Galactose
3. Galactose $+$ Galactose
4. Galactose $+$ Fructose

Q. What is common among amylase rennin and trypsin?

1. These are produced in stomach
2. These act at a pH lower than $7$
3. these all are proteins
4. These all are proteolytic enzymes.

Q. Which type of linkage is present in maltose?

1. $\alpha 1\to 4$ glycosidic linkage
2. $\alpha 1\to 2\beta$ glycosidic linkage
3. $\beta 1\to 4$ glycosidic linkage
4. $\alpha 1\to 6$ glycosidic linkage

Q.

Which of the following secretions is correctly matched with its pH?

1. Pancreatic juice pH = 8.8

2. Salivary amylase pH = 6.7

3. Gastric juices pH = 2.0

4. Intestinal juice = 8.3

Q. The crypts of lieberkuhn secrete

1. Gastrin
2. Rennin
3. Cholecystokinin
4. Succus entericus

Q.

Sweetest sugar is derived from the breakdown of

1. Cane sugar

2. Malt sugar

3. Milk sugar

4. Blood sugar

Q.

Most digestion and absorption of food takes place in

1. Stomach

2. Liver

3. Large intestine

4. Small intestine

Q.

A young infant may be feeding entirely on mother's milk, which is white in colour but the stools, which the infant passes out, is quite yellowish. This yellow colour is due to?

1. pancreatic juice poured into duodenum

2. intestinal juice

3. bile pigments passed through bile juice

4. undigested milk protein casein

Q.

Which of the following is FALSE about Gastric Juice?

1. It is secreted by the inner line of the stomach.

2. It contains the enzyme called Pepsin.

3. It is white in color.

4. It kills the germs entered along with food.

Q. Consider the following statement and select the option which correctly identifies true(T) and false(F).
Escherichia coli is present in intestine of human where they help in digestion of food.