Which of the Following Statements Is Most Correct Regarding the Intracellular

question 62

Multiple Choice

Which of the following statements is most correct regarding the intracellular chemical signals known as "second messengers"?

• A) Cyclic AMP and calcium may be second messengers.
• B) Second messengers act through receptors called K-proteins.
• C) Second messengers usually inactivate protein kinase enzymes.
• D) Second messengers usually act to remove nitric oxide (NO) from the cell.

---

Definitions:

Homozygous

An organism that has two identical alleles for a trait on both homologous chromosomes.

Dihybrid Cross

A genetic cross that takes into account the behavior of alleles of two loci. Compare with monohybrid cross.

Loci

Fixed positions on a chromosome where specific genes or genetic markers are located.

Chromosome Theory

The principle that genes are located on chromosomes, which are the basis for heredity and genetic inheritance.