Tag: digestive glands and their secretions

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Questions Related to digestive glands and their secretions

Multiple choice bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

Which of the following statements is false?

  1. The breakdown of most of biomacromolecules occurs in duodenum.

  2. Simple substances (digested foods) are absorbed in the jejunum and ileum.

  3. Significant digestive activity occurs in large intestine.

  4. Undigested and unabsorbed substances are passed on to the large intestine.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The correct answer is (c).

Multiple choice bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

Match the two columns and select the right one among options given.

Column I Column II
A. Duodenum  (i) A cartilaginous flap
B. Epiglottis  (ii) Small blind sac
C. Glottis  (iii) 'U' shaped structure emerging from the stomach
D. Caecum  (iv) Opening of wind pipe

  1. A-(i), B-(ii), C-(iii), D-(iv)

  2. A-(iv), B-(iii), C-(iv), D-(i)

  3. A-(iii), B-(i), C-(iv), D-(ii)

  4. A-(ii), B-(iv), C-(i), D-(iii)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

(A) Duodenum - 'U' shaped structure emerging from the stomach

(B) Epiglottis - A cartilaginous flap
(C) Glottis - Opening of wind pipe
(D) Caecum - Small blind sac
So, the correct answer is (c).

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Digestion of food
Which one of the following is the coned matching of the site of action on the given substrate, the enzyme acting upon it and the end product ?

  1. Small intestine : Proteins $\overset{Pepsin}{\rightarrow}$ Amino acids
  2. Stomach : Fats $\overset{Lipase}{\rightarrow}$ Micelles
  3. Duodenum : Triglycerides $\overset{Trypsin}{\rightarrow}$ Monoglycerides
  4. Small intestine.: Starch $\overset{\alpha - amylase}{\rightarrow}$ Disaccharide (maltose)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Starch is broken down by alpha-amylase into disaccharides like maltose in the small intestine. Option A is wrong because pepsin works in the stomach, and Option C is wrong because trypsin acts on proteins, not triglycerides.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Isomaltase catalyzes the hydrolysis of bonds as shown in

  1. glc(1-6)glc

  2. glc(1-4)glc

  3. gal(1-6)glc

  4. fru(1-6)glc
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Isomaltase is an enzyme that breaks the bonds linking saccharides, which cannot be broken by amylase or maltase. It digests polysaccharides at the alpha 1-6 linkages

So, the correct option is 'glc(1-6)glc'

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Which of the following is a group of end products of carbohydrate digestion?

  1. Glucose, galactose, maltose

  2. Sucrose, galactose, maltose

  3. Galactose, glucose, fructose

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The end product of carbohydrate digestion is mainly glucose together with some fructose and galactose (monosaccharide). 

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Chylomicrons are __________________.

  1. Fat droplets coated with phospholipids

  2. Fat droplets coated with cholesterol and protein

  3. Undigested proteins

  4. Undigested carbohydrates
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Fatty acids and glycerol being insoluble, cannot be absorbed into the blood. So, they are first incorporated into small droplets called micelles which move into the intestinal mucosa. 
  • They are then re-formed into very small protein coated fat globules called the chylomicrons which are transported into the lymph vessels (lacteals) in the villi. These lymph vessels ultimately release the absorbed substances into the bloodstream. Hence, chylomicrons are fat droplets coated with cholesterol and proteins.
So, the correct answer is 'fat droplets coated with cholesterol and proteins'.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Fat is completely digested in the

  1. Stomach

  2. Mouth

  3. Small intestine

  4. Large intestine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Digestion of some fats can begin in the mouth where lingual lipase breaks down some short chain lipids into diglycerides. However, fats are completely digested in the small intestine.
  • Fat is completely digested in the small intestine because it gets bile from the liver through gallbladder which is responsible for fat digestion.
  • Hence Fat is completely digested in the Small intestine.
  • So, the correct answer is 'Small intestine'.
Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Carbohydrates in the chyme are hydrolysed to disaccharide by amylase of 

  1. Pancreatic juice

  2. Gastric juice

  3. Brunners gland

  4. Crypts of Lieberkuhn
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The chyme produced by digestion in the stomach is passed on to the small intestine for further digestion and absorption where the enzyme pancreatic amylase of the pancreatic juice converts the carbohydrates present in the chyme into disaccharides and monosaccharides. 

So, the correct answer is 'Pancreatic juice'.