Question

Promoters of many genes have mostly adenines and thymines. What is the most likely reason for this high proportion of adenines and thymines?

Answer 1

This is the region where template and nontemplate strands separate, and A-T base pairs require less energy to separate than G-C base pairs.

Step-by-step explanation:

Answer 2

The adenine and thymine base pairs are easy to separate as compared to the guanine and cytosil base pairs. Hence, separation of DNA strands via promoter sequences always take place on the site of high proportion of adenines and thymines.

Step-by-step explanation:

Eukaryotic genes have a conserved promoter sequence every 25 to 35 base pairs upward at the site of transcription. These promoter sequences senses that which DNA strand shall be transcribed. Hence, this is the region of separating the DNA strands divided into template and non-template sequences. The promoter sequence develops upstream into the base pairs where A-T sequence is in higher proportions.