Which of the Following Is NOT Generally Characteristic of Pathways

question 76

Multiple Choice

Which of the following is NOT generally characteristic of pathways activated by second messengers?

• A)Each signaling pathway consists of a series of distinct proteins that operate in sequence.
• B)Each protein in the pathway typically acts by altering the conformation of the previous (upstream)protein in the series, an event that activates or inhibits the protein.
• C)Alterations in the conformations of signaling proteins are often accomplished by protein kinases and protein phosphatases that, respectively, add or remove phosphate groups from other proteins.
• D)Some phosphatases and protein kinases in the pathway have numerous proteins as their substrates; others act on only a single protein substrate or a single amino acid of a protein substrate.
• E)Many of the protein substrates of the pathway enzymes are enzymes themselves, like other kinases and phosphatases, but they include ion channels, transcription factors and various regulatory molecules.

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Definitions:

Sexually Transmitted Diseases

Infectious diseases that are primarily spread through sexual contact, affecting both men and women's health and fertility.

Women

Adult human females, often referred to in contexts involving gender-specific issues, physiology, and societal roles.

Female Condoms

Barrier contraceptives that are inserted into the vagina to prevent sperm from reaching the uterus, offering protection against STIs and pregnancy.

Male Condoms

A contraceptive device made of latex or other materials that is worn over the penis during sexual intercourse to prevent pregnancy and reduce the risk of STDs.