10
MCQ (Single Correct Answer)
Mark the right statement among the following
A
Trypsinogen is an inactive enzyme
B
Trypsinogen is secreted by intestinal mucosa
C
Enterokinase is secreted by pancreas
D
Bile contains trypsin
11
The food mixes thoroughly with the acidic gastric juice of the stomach by the churning movements of its muscular wall. What do we call the food then?
Explanation
The food is stored in stomach for 4-5 hours, and it gets thoroughly mixed with the acidic gastric juice of stomach by the churning movements of its muscular wall. The food at this stage is called as chyme.
12
Trypsinogen is an inactive enzyme of pancreatic juice. An enzyme, enterokinase, activates it. Which tissue/cells secrete this enzyme?/How is it activated?
Explanation
Trypsinogen is activated to trypsin by the enzyme enterokinase. This enzyme is secreted by the intestinal mucosa.
13
Name the enzymes involved in the breakdown of nucleotides into sugars and bases?
Explanation
The enzymes nucleotidases and nucleosidases are involved in the breakdown of nucleotides into sugars and bases.
Nucleotides $\xrightarrow{\text { Nucleotidases }}$ Nucleosides $\xrightarrow{\text { Nucleosidases }}$ Sugars + Bases
14
Define digestion in one sentence.
Explanation
The process of conversion of complex food substances to simple absorbable forms by mechanical and biochemical methods is called digestion.