Q1. Spontaneous depurination of DNA occurs at the rate of about 3 X 10-9 depurinations per purine per minute, most of which are repaired. The genome size of a diploid human cell is approximately 6 X 109 base pairs. Around how many spontaneous depurinations must be repaired per day in each cell in your body? How various total depurinations in your body each day?

Q2. Cheetahs (large African cats) are able to run faster than 60 miles per hour while chasing prey. How a biologist would explain how ability to run fast evolved in cheetahs, assume their ancestors would only run 20 miles per hour?