HUMAN BIOLOGY

1. A portion of specific mRNA consists of the following sequence of nucleotide triplets.

CUC AAA UCG CCU CGU

This mRNA sequence codes for the following short polypeptide.

leucine – lysine – serine – proline – arginine

Describe the steps in the synthesis of this polypeptide. What would be the effects of a substitution in one of the nucleotides?

2. Describe two of the characteristics of today’s modern society that make it unsustainable.

3. Describe the specific chromosomal abnormality of a person with Trisomy 21 (Down syndrome).

4. What is the one thing about this class that you learned that was new to you. Did you find it interesting? Why or why not?