Where is double negative selection is found during T-cell formation?

TLS Online TPP Program

#Question id: 27511

#Unit 2. Cellular Organization

Which of the following is true when a Intercalation of ethidium ion into the DNA takes place

a. It unwind the two base pair by 260

b. Reduces the normal rotation per base pair from 360 to 100

c. Increases the normal rotation per base pair from 100 to 360

d. It first removes the negative supercoils and then introduces positive supercoils

TLS Online TPP Program

#Question id: 27512

#Unit 2. Cellular Organization

If a B-DNA having superhelical density  is -0.05 and the value of LK = 200, then what will be the length of DNA

TLS Online TPP Program

#Question id: 27513

#Unit 2. Cellular Organization

Which of the following chemical reagent is used to measure the effect of nicking the DNA

TLS Online TPP Program

#Question id: 27514

#Unit 2. Cellular Organization

Which of the following Histone is involved in stimulates formation of the 30 nm fiber

TLS Online TPP Program

#Question id: 28167

#Unit 2. Cellular Organization

Organism and genes is given

Match them correctly

TLS Online TPP Program

#Question id: 30074

#Unit 2. Cellular Organization

Following statements were made about transposons:

A. Transposons have inverted terminal repeats and their integration generates inverted repeats at the flanks of the target site in the host genome.

B. A composite transposon can transpose as a unit.

C. The transposition event may cause deletions or inversions or move a host sequence to a new location.

D. The transposition event may cause deletions or inversions but cannot move a host sequence to a new location.

E. Replicative transposition proceeds through cointegration.

Which one of the following represents the combination of the correct statements?