Intestinal Juice

Q.

How many enzymes in the list given below are found in intestinal juice?

Trypsin, Pepsin, Sucrase, Lactase, Rennin, Carboxypeptidase, Nuclease, Dipeptidase, Maltase, Enterokinase

1. Six
2. Three
3. Four
4. Five

Q.

Name the enzyme that converts starch into maltose.

1. Amylase

2. Maltase

3. Lipase

4. Protease

Q. The enzymes that is not present in succus entericus is:

1. lipase
2. maltase
3. nucleases
4. nucleosidase

Q. GUG specifies amino acid valine. However, when functioning as initiation codon it specifies

1. Methionine
2. Valine
3. Lysine
4. Isoleucine

Q. Paneth cells in the mucosa of the small intestine secretes

1. lysozyme
2. bioactive peptides and bioamines
3. bicarbonate
4. pepsin and rennin

Q.

Trypsinogen is an inactive enzyme of pancreatic juice. An enzyme, enterokinase, activates it. Which tissue/cells secrete this enzyme?/How is it activated?

Q.

Which of the following enzyme is not present in succus entericus?

1. lipase

2. maltase

3. nucleosidase

4. nucleases

Q.

Who discovered glyoxysomes?

Q.

What enzyme breaks down dipeptides into amino acids?

Q.

1. Choose the correct answer among the following:

(a) Gastric juice contains

(i) pepsin, lipase and rennin

(ii) trypsin lipase and rennin

(iii)trypsin, pepsin and lipase

(iv)trypsin, pepsin and renin

(b)Succus entericus is the name given to

(i) a junction between ileum and large intestine

(ii) intestinal juice

(iii)swelling in the gut

(iv)appendix

Q.

What is the function of Enterokinase?

Q. Crypts of Lieberkuhn secrete

1. bile juice
2. saliva
3. succus entericus
4. gastric juice

Q.

Why is pepsin inactive?

Q. Which of the following hormone stimulates the secretion of pancreatic juice which is rich in enzymes?

1. Gastrin
2. Secretin
3. Cholecystokinin
4. Both b and c

Q. The breakdown of biomacromolecules such as carbohydrates, fats and proteins mostly occurs in which part?

1. Large intestine
2. Small intestine
3. Liver
4. Pancreas

Q. Which of the following is correct with respect to succus entericus?

1. It is also known as intestinal juice
2. All the above
3. It contains digestive enzymes
4. It is secreted by cells in the mucosa of the small intestine

Q. If this enzyme were to be absent in our small intestine, digestion of proteins in our body will be severely affected.

1. enterokinase
2. maltase
3. pancreatic amylase
4. lipase

Q.

Is enterokinase a brush border enzyme?

Q. Which of the following converts trypsinogen into trypsin?

1. HCl
2. Enterokinase
3. Castle’s intrinsic factor
4. Pepsin

Q. Gastrointestinal secretion and local blood flow are mainly controlled by

1. Auerbach’s plexus
2. myenteric plexus
3. submucosal plexus
4. none of the above

Q. The codons for proline are :

1. GGC, GGG, GGU
2. CUU, UCA, CUG
3. GUU, GUC, GUG
4. GGU, GUC, GGA

Q. The pH of stomach is 1.6, the which enzyme will digest protein in such acidic condition is _____

1. Trypsin
2. Pepsin
3. Amylase
4. Erepsin

Q. Chyme changes to chyle upon the addition of .

1. intestinal juices
2. saliva
3. HCl
4. bile

Q. Answer the following:
(i) State the function of HCl.

Q. Substrate of an enzyme is

1. the reactant of the reaction catalysed by the enzyme
2. competitive inhibitor of the enzyme
3. uncompetitive inhibitor of the enzyme
4. prosthetic group of the enzyme

Q. _____________ hormone stimulates the contraction of gall bladder for release of bile juice.

1. Secretin
2. Cholecystokinin
3. Gastrin
4. GIP

Q. Can carboxypeptidase and aminopeptidase work simultaneously on a single peptide chain from two different ends?

Q. The intestinal juice, succus entericus is secreted by

1. Brunners gland
2. Kupffer cells
3. Crypts of Leiberkuhn
4. Goblet cells

Q. Which of the following factors can affect the enzymatic activity?
A. Change in temperature
B. Change in pH
C. Change in substrate concentration
D. Binding of specific chemical to enzyme

1. A, B, C, D
2. A, B, D
3. A, B
4. B, C, D

Q.

Succus entericus lacks

1. Lipase

2. Nucleosidase

3. Nuclease

4. Maltase