One is unequal crossing over, in which recombination happens between different positions on chromosomes that are misaligned during meiosis. 

Another is replication slippage, in which the DNA polymerase loses its place and copies a segment of chromosome twice.

TLS Online TPP Program

#Id: 1312

#Unit 2. Cellular Organization

Cardiac glycosides (e.g., ouabain and digitalis) are a class of drugs that inhibits Na+-K+ ATPase.

TLS Online TPP Program

#Id: 1504

#Unit 2. Cellular Organization

Microtubules are polymers of the protein tubulin.

TLS Online TPP Program

#Id: 1505

#Unit 2. Cellular Organization

The tubulin subunit is a heterodimer formed from two closely related globular proteins called a-tubulin and b-tubulin.

TLS Online TPP Program

#Id: 1506

#Unit 2. Cellular Organization

a-tubulin and b-tubulin comprising 445–450 amino acids, which are tightly held together by noncovalent bonds.

TLS Online TPP Program

#Id: 1507

#Unit 2. Cellular Organization

Each α or β monomer has a binding site for one molecule of GTP.

TLS Online TPP Program

#Id: 1508

#Unit 2. Cellular Organization

The GTP that is bound to α-tubulin is physically trapped at the dimer interface and is never hydrolyzed.