Ricin Is Made from Castor Beans and Is a Strong

question 1

Multiple Choice

Ricin is made from castor beans and is a strong toxin which:

• A) removes an adenine from 28S rRNA.
• B) glycosylates tRNA.
• C) inhibits protein synthesis initiation.
• D) blocks the A binding site.
• E) coats the mRNA.

---

Definitions:

Hybrid Sterility

A condition where offspring from the crossbreeding of two different species are unable to reproduce.

Fertilization

The union of male and female gametes to form a zygote, initiating the development of a new individual organism.

Temporal Isolation

A mechanism that prevents species from mating because they are active at different times of the day, year, or mating seasons.

Behavioral Isolation

A form of reproductive isolation in which two populations develop differences in mating rituals or behaviors that prevent them from breeding with each other.