The structure related to storage and maturation of sperms in a human male is:

1. Epididymis
2. Epidermis
3. Epithelium
4. Endothelium

A sequence of DNA has 200 nitrogenous base pairs, of which 100 are Thymine-Adenine pairs. What is the number of Cytosine-Guanine pairs in this sequence:

1. 50
2. 200
3. 100
4. 25

Compressed natural gas (CNG) is proposed to be a better alternative to fossil fuel. Which of the following reasons makes it a better alternative?

P. Combustion leaves little or no residue

Q. Absence of Carbon in CNG

R. Easily available

1. Only P
2. Only Q
3. Only P and R
4. Only Q and R

The ground substance present in chloroplast is:

1. Stoma
2. Stroma
3. Grana
4. Thylakoids