Select all that apply. trigger other proteins and enzymes to stimulate cell division. external and internal stimuli regulating protein agents activators and inhibitors metabolic pathways

The right answer is Regulating protein agents.

The regulating protein agents they are talking about is certainly the cyclin, especially cyclin B.

Cyclins have no enzymatic activity, they are regulatory proteins necessary for Cdk to be enzymatically active.

The activation of the Cyclin B / Cdk1 stock is the result of a series of complex and interdependent reactions:

When replication is complete, the Cdc25 phosphatase is no longer sequestered in the cytoplasm and passes into the nucleus, and at the end of the G2 phase, the Cdc phosphatase is activated, probably by phosphorylation by the Polo kinase. Cdc 25 then acts to remove the two phosphates inhibitors Cyclin B / Cdk 1 (after that, there is a process of self-activation).

Cyclin B / Cdk 1 complexes, once activated, allow entry into mitosis. For this, they intervene by triggering a number of phenomena that take place at the beginning of mitosis, that is to say in prophase.

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)