Which of the following reactions is not catalysed

by a brush border enzyme?

(1) Maltose $\stackrel{\mathrm{Maltase}}{\to }$ glucose+ glucose

(2) Lactose $\stackrel{\mathrm{Lactase}}{\to }$ glucose + glucose

(3) Starch $\stackrel{\mathrm{Amylase}}{\to }$ Disaccharide

(4) Nucleotides $\stackrel{\mathrm{Nucleotidase}}{\to }$ Nucleoside

Which of the following statements is incorrect?

(1) About 30% of starch is hydrolysed in the

     buccal cavity

(2) Small amounts of lipases are also secreted by 

     gastric glands

(3) Chymotrypsinogen is activated by trypsin

(4) Brunner's glands secrete enzymes and mucus

Transverse section of gut shows four layers of the wall 

i.e serosa, muscularis, submucosa and mucosa.

Which of the following statements is not correct

regarding its arrangement and modification?

(1) Serosa is the outermost layer which is made 

     of thin mesothelium

(2) Oblique muscle layer is present in stomach

(3) All the four layers show modifications in 

     different parts of alimentary canal

(4) Villi and rugae are modified mucosal and 

     submucosal layers respectively

Common bile duct includes

(1) Right and left hepatic ducts and cystic duct 

(2) Common hepatic duct and cystic duct 

(3) Cystic duct and pancreatic duct 

(4) Common hepatic duct and pancreatic duct

Which type of cells are the part of tubular glands

of the stomach epithelium?

A. Pariental cells 

B. Peptic cells

C. Zymogen cells 

D. Oxyntic cells

(1) D only 

(2) A & d

(3) A, B & c 

(4) A, B, C & D

Digestion of fats starts in 

(1) Mouth 

(2) Stomach

(3) Small intestine

(4) Pharynx

Given below is a diagrammatic representation of 

transverse section of gut

Choose the option which is correct for the layers 

labelled as A , B, C, and E

(1) A $—$ Serosa

     B  $—$ Longitudinal muscle layer

     C  $—$ Circular muscle layer

     D  $—$ Mucosa

     E  $—$  Submucosa

(2) A  $—$  Mucosa

     B  $—$   Circular muscle layer

     C  $—$   Longitudinal muscle layer

     D  $—$   Submucosa

     E  $—$    Serosa

(3) A  $—$    Serosa

     B  $—$    Circular muscle layer

     C  $—$    Longitudinal muscle layer

     D   $—$    Submucosa

     E   $—$     Mucosa

(4) A   $—$    Serosa 

     B    $—$    Longitudinal muscle layer

     C   $—$     Circular muscle layer

     D   $—$     Submucosa

     E   $—$      Mucosa

Gastric glands are found in

(1) Mucosa and submucosa

(2) Crypts of Lierkuhn

(3) Mucosa 

(4) Muscularis externa

Carbohydrates in the chyme are hydrolysed to 

disaccharide by amylase of

(1) Pancreatic juice

(2) Gastric juice

(3) Brunner's gland

(4) Crypts of Lieberkuhn

Gastric juice contains

1. Trypsin, lipase, rennin

2. Pepsin, lipase, rennin

3. Trypsin, pepsin, lipase

4. Pepsin, rennin, amylase