Chromosome mutation- Difference from the wild type in the number or structure.

TLS Online TPP Program

#Id: 3977

#Unit 2. Cellular Organization

The degree of supercoiling of bacterial DNA is maintained by regulation of the net activity of topoisomerases, I and II.

TLS Online TPP Program

#Id: 9421

#Unit 11. Evolution and Behavior

Handicap principle: Long tail feathers function as a sign of an individual’s genetic quality because the bearer must be able to afford this energetically costly trait. 

TLS Online TPP Program

#Id: 4651

#Unit 13. Methods in Biology

If cells that have incorporated a high level of BrdU are exposed to light, they will photolyse; this has been used to selectively kill newly dividing cells.

TLS Online TPP Program

#Id: 8339

#Unit 2. Cellular Organization

Filament capping proteins:

CapZ blocks (+)end Tropomodulin blocks (-)end

TLS Online TPP Program

#Id: 9844

#Unit 6. System Physiology – Plant

Cryptochromes bind a (FAD) and the pterin 5,10 methyltetrahydrofolate (MTHF) as chromophores