DnaA is the E. coli licensing factor that must be made anew for each round of replication. Drugs that block protein synthesis block a new round of replication, but not continuation of replication.

TLS Online TPP Program

#Id: 2243

#Unit 11. Evolution and Behavior

The loci that encode hemoglobins are members of a gene family, which is a set of loci that arose by duplication.

TLS Online TPP Program

#Id: 2821

#Unit 13. Methods in Biology

In Ion-exchange chromatography There are two types of ion exchanger, namely cation  and anion exchangers.

TLS Online TPP Program

#Id: 2193

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 6781

#Unit 3. Fundamental Processes

A set of conserved protein-coding genes is tightly associated with the CRISPR sequences. The two most highly conserved members (cas1 and cas2, for “CRISPR associated”) are found in all cases

TLS Online TPP Program

#Id: 4321

#Unit 11. Evolution and Behavior

Italian physician Francesco Redi (1626–1697),

His hypothesis was supported when maggots developed in the uncovered jars, but no

maggots appeared in either the gauze-covered or the tightly sealed jars. He concluded that

maggots could only form when flies were allowed to lay eggs in the meat, and that the

maggots were the offspring of flies, not the product of spontaneous generation.