Question

Which of the following belongs to the class of pepsin and trypsin
A. Rennin
B. Sucrose
C. Thyroxine
D. Secretin

Answer 1

Hint: Enzymes are the biological catalysts generally known to increase the rate of reaction by decreasing the activation energy of reaction. The compound on which enzyme acts is known as substrate and the resultant compound after reaction is known as product.

Complete Answer:
- Rennin is the digestive enzyme which digests the milk protein, thus rennin is present in the gut of the calf and also in the infants. Pepsin and trypsin are also the digestive enzymes basically responsible for the digestion of proteins.
- Sucrose is the carbohydrate, sucrose is also known as table sugar, present in sugarcane and it is a disaccharide made up of glucose and fructose.
- Thyroxine is a hormone and it is derivative of amino acid tyrosine made in thyroid gland and has many functions such as regulation of BMR, regulation of heart rate etc.
- Secretin is also a hormone which is produced in duodenum and it regulates water homeostasis in the body.

Thus the correct answer is option A: Rennin.

Note: Biomolecules are the molecules of the living world. The different types of biomolecules are carbohydrates, lipids, proteins, enzymes etc. Hormones are the compounds secreted by endocrine glands in the body and perform various functions in the body. All enzymes are protein in nature thus rennin, trypsin and pepsin are enzymes protein in nature, but hormones are steroids, proteins, water soluble , lipid soluble etc.