What is the criterion for the movement of DNA fragments on agarose gel during gel electrophoresis?

1.	The smaller the fragment size, the farther it moves
2.	Positively charged fragments move to farther end
3.	Negatively charged fragments do not move
4.	The larger the fragment size, the farther it moves

A gene whose expression helps to identify transformed cell is known as:

DNA fragments are:

1. Negatively charged

2. Neutral

3. Either positively charged depending on their size

4. Positively charged

Which of the following restriction enzymes produces blunt ends?

1. Sal l

2. Eco RV

3. Xho

4. Hind lll

A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant plasmid using?

The process of separation and purification of expressed protein before marketing is called:

1. Downstream processing

2. Bioprocessing

3. Post-product processing

4. Upstream processing