Question

1. Different vitamins and their role in metabolism.

2. Where are sperms produced in the testes? What are the secretions of interstitial cells?

3. Stages involved in spermatogenesis and spermiogenesis. Products of each stage and the

characteristics of the product.

4. Name and chemical characteristics of the products of prostate gland, bulbourethral gland,

preputial gland and seminal gland (seminal vesicle)

Answer 1

Answer -there are different vitamins that plays role in metabolism are as follows =

1.Thymine - is important in glucose metabolism. It acts as cofactor for enzymes that breaks down glucose for energy production.

2.plays an important role in production of ribose from glucose. Therefore important in the production of DNA, RNA and proteins.

2.riboflavin or B2- it is important component of flavoprotein which are coenzymes involved in many metabolic pathways of carbohydrates, lipid and protein metabolism. Flavoproteins aid in the transfer of electrons in the electron transport chain.

3.Niacin or vitamin B3 - it is component of coenzymes nicotnamide adenine dinucleotide (NAD) and it's phosphorylated form NADP. That are involved in metabolism of carbohydrates, lipids and proteins.

NADH is predominant electron carrier and transfer electrons to electron transport chain.

NADPH is required for anabolic pathways of fatty acid and cholesterol synthesis.

4.pantothenic acid -forms acetyl -CoA which is the main carrier of carbon atoms in metabolism.

Acetyl CoA is the main carrier of glucose, fatty acids, amino acids into the citric acid cycle.

Acetyl CoA also involved in synthesis of lipids, cholesterol and acetylcholine.

3.