Compounds That Generate Nitrous Acid (Such as Nitrites, Nitrates, and Nitrosamines)

question 93

Multiple Choice

Compounds that generate nitrous acid (such as nitrites, nitrates, and nitrosamines) change DNA molecules by:

• A) breakage of phosphodiester bonds.
• B) deamination of bases.
• C) depurination.
• D) formation of thymine dimers.
• E) transformation of A \(\rightarrow\) T.

Recognize the role and function of GABA and G protein-linked receptors in cell signaling.

Differentiate between true statements and misconceptions about receptors.

Understand the process and types of intracellular and surface receptors.

Identify the differences in cell signaling mechanisms such as electrical, chemical, and paracrine signaling.

---

Definitions:

Teratogens

Agents that can cause congenital abnormalities or increase the incidence of an anomaly in a fetus when a mother is exposed during pregnancy.

Blastocyst

An early stage of embryonic development characterized by a fluid-filled sphere made up of 50-150 cells, occurring before implantation into the uterine lining.

Placenta

An organ in pregnant female mammals that nourishes and maintains the fetus through the umbilical cord.

Proximodistal Development

A pattern of growth where physical development starts at the center of the body and moves towards the extremities.