DNA Structure and Function

Front

structure of DNA?

Back

phosphate group, sugar backbone, nitrogenous base

Front

What are the pyrimidines?

Back

Cytosine, Thymine, and Uracil (only in RNA)

Front

What are the purines?

Back

Guanine and Adenine

Front

What is the difference between pyrimidines and purines?

Back

Pyrimidines have a single-ring base while Purines have double-rings

Front

What is Uridine?

Back

Uracil and Ribose

Front

What is Deoxyadenylic acid?

Back

Adenine and phosphoric acid

Front

Why is DNA stable?

Back

The hydrogen bonds are weak but since there are thousands of them, it makes the DNA stable

Front

How do nitrogen bases react to water?

Back

Nitrogen bases are hydrophobic and repel water

Front

How does the sugar-phosphate backbone react to water?

Back

The SPB is hydrophilic and attracts water

Front

What are the three types of selection?

Back

Directional, Disruptive, and Stabilizing