Apoptosis

question 206

Multiple Choice

Apoptosis

• A) occurs only in animals.
• B) is triggered solely by signals external to the cell.
• C) occurs only during development.
• D) is similar to necrosis.
• E) is controlled by signal transduction pathways.

---

Definitions:

Collagen

The main structural protein found in skin and other connective tissues, providing strength and elasticity.

Enzymes

Biological catalysts that speed up chemical reactions in the body without being consumed by the reactions.

Hormones

Chemical messengers produced by glands that regulate various functions in the body by acting on specific target organs.

Amino Acids

The building blocks of proteins, consisting of a central carbon atom bonded to an amino group, a carboxyl group, a hydrogen atom, and a variable side chain.