Practice Questions

TLS Online TPP Program

#Question id: 2873

With reference to aberrant methylation of bases which of the following statements, if any, is false?

#Unit 2. Cellular Organization

S-adenosylmethionine donates methyl groups to a range of different molecules in cells and frequently inappropriately methylates bases in DNA.
Guanine is occasionally methylated to give O-6-methylguanine which base pairs with adenine rather than with cytidine.
In each nucleated cell, about 300-600 adenines are converted to 3-methyladenine per day.
3-methyladenine can be a cytotoxic base: it distorts the double helix and that can disrupt crucial DNA-protein interactions.

More Questions

TLS Online TPP Program

#Question id: 32338

#Unit 2. Cellular Organization

Which of the following actin binding protein inducing a small twist to destabilizes the filament, breaking it into short pieces.?

TLS Online TPP Program

#Question id: 3930

#Unit 3. Fundamental Processes

Which is not part of the lac operon?

TLS Online TPP Program

#Question id: 33459

#Unit 1. Molecules and their Interaction Relevant to Biology

2-oxy-4-oxy 5-methyl pyrimidine is

TLS Online TPP Program

#Question id: 28257

#Unit 5. Developmental Biology

In mammalian eggs, containing thick extracellular matrix is known as

TLS Online TPP Program

#Question id: 1745

#Unit 4. Cell Communication and Cell Signaling

On injection into mice, bovine serum albumin conjugated with dinitrophenol (DNP) behaves as a: