Which of the Following Statements Is Most Correct Regarding the Intracellular

question 83

Multiple Choice

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

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

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Definitions:

Hominoid Fossil

Ancient remains or imprints of hominids and apes, crucial for understanding human evolution and the lineage of primates.

Human Evolutionary Line

The lineage leading to modern humans, detailing the biological and chronological development of human species over millions of years from primordial ancestors.

Bipedalism

Bipedalism is the ability to walk on two legs, a key feature that distinguishes humans and their ancestors from other primates and is considered a foundational trait in human evolution.

Large Brain

Refers to species, particularly humans, that have a relatively large brain size in comparison to their body size, which is associated with higher levels of cognition and complex behaviors.