State the cemical nature of androgens and oestrogens. Mention their roles.

Mention the chemical nature of animal hormones?

State the nature of secretion of golgi boides.

State the general role of Ca, P, Fe, I and N.

State the difference between Oestrogen and Testosterone.

Write the equations involved in the extraction of gold by cyanide process. Mention the role of Zn.

State the role of thyroxine hormones in control in BMR.

Write down the names of sites of secretion and one function each of Testosterone and Oestrogen. Mention one function of GTH.

Name the enzyme present in the saliva of human beings and mention its role.

Mention one role of Estrogen

State-the role of carrier in pollination.