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What is a gene?
A section of DNA that codes for polypeptides and functional RNA
What is a locus?
A section of DNA where a gene is located
How many bases code for an amino acid?
Three
What are the bases of DNA?
Cytosine, Guanine, Adenine and Thymine
How many amino acids are naturally occurring in the human body?
20
Name and describe the three characteristics of DNA triplet codes
Degenerate - the idea that some amino acids have multiple codes
Non-overlapping - Each triplet code is only read once
Universal - triplet codes code for the same amino acid across all organisms
How is RNA polymerase able to tell which direction to read the template strand?
Every gene starts with the start codon AUG
What is the name for the sequence of bases that code for amino acids?
Exons
What are the non-coding regions of DNA called?
Introns
Note 
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