The total magnification is a product of the magnification of the individual lenses.

Total magnification= 40X*10X

TLS Online TPP Program

#Id: 3230

#Unit 3. Fundamental Processes

Transcriptionally active genes are preferentially repaired via transcription-coupled repair.

TLS Online TPP Program

#Id: 3233

#Unit 3. Fundamental Processes

Global genome repair and transcription-coupled repair differ in their mechanisms of damage recognition (XPC vs. RNA polymerase II).

TLS Online TPP Program

#Id: 3236

#Unit 3. Fundamental Processes

transitions, which are pyrimidine-to-pyrimidine and purine-to-purine substitutions, such as T to C and A to G;

TLS Online TPP Program

#Id: 3238

#Unit 3. Fundamental Processes

transversions, which are pyrimidine-to-purine and purine-to-pyrimidine substitutions, such as T to G or A and A to C or T.

TLS Online TPP Program

#Id: 3240

#Unit 3. Fundamental Processes

Mutations that alter a single nucleotide are called point mutations.

TLS Online TPP Program

#Id: 3241

#Unit 3. Fundamental Processes

Chemical mutagens can be divided into two groups:

those that are mutagenic to both replicating and nonreplicating DNA, such as the alkylating agents and nitrous acid; and 

those that are mutagenic only to replicating DNA, such as base analogs— purines and pyrimidines with structures similar to the normal bases in DNA.