List of top Life Science Questions asked in Common University Entrance Test

The portion of transmembrane proteins that cross the lipid bilayer are usually:

Which of the following is not a fluorescence dye?

The technique used to identify the specific DNA in bacterial colonies is:

Which metal is used for electron beam generation in scanning electron microscopy?

What is the role of sodium dodecyl sulfate (SDS) in protein electrophoresis?
(A) Add net negative charge to the protein
(B) Separate lipids on the basis of their molecular weight
(C) Modify native conformation of a protein
(D) Allows direct destaining of the proteins
Choose the correct answer from the options given below:

Isoelectric focusing allows separation of the proteins according to their:

Match List I with List II:

List I	List II
(A) Western Blotting	(II) Protein identification
(B) Southern Blotting	(I) DNA identification
(C) Northern Blotting	(IV) RNA identification
(D) Yeast two-hybrid system	(III) Protein-protein interaction

Choose the correct answer from the options given below:

Arrange the given steps involved in polymerase chain reaction (PCR):
(A) Denaturation
(B) Annealing
(C) Extension
(D) Cycling
Choose the correct answer from the options given below:

Vertical gel electrophoresis is routinely used for the separation of:

Which is not a unit of radioactivity?

In the technique called centrifugation, the centrifugal field (G) is calculated as: