A Group of Compounds Containing Four Monopyrrole Rings Connected by Methane

question 8

Multiple Choice

A group of compounds containing four monopyrrole rings connected by methane bridges is the:

• A) porphyrins.
• B) porphyrias.
• C) porphobilinogens.
• D) heme precursors.

---

Definitions:

Lipid

A group of naturally occurring molecules that include fats, waxes, sterols, and vitamins, serving as a key component of cell membranes and energy storage.

Transmission Electron Microscope

A microscopy technique in which a beam of electrons is transmitted through a specimen to form an image.

Electromagnets

A type of magnet in which the magnetic field is produced by an electric current.

Reproduction

The biological process through which organisms produce offspring, either sexually or asexually.