DNA Base Pairing and Direction

The video tutorial explains how to determine the complementary strand of a DNA sequence. It covers the base pairing rules where adenine pairs with thymine and cytosine pairs with guanine. The tutorial also demonstrates color coding for these pairs and emphasizes the importance of reading DNA strands from the 5' to 3' direction. The tutorial concludes with a practical example of constructing a complementary DNA strand.

What is the complementary base for adenine in DNA?

• Uracil

• Cytosine

• Guanine

• Thymine

Which base pairs with guanine in a DNA strand?

• Uracil

• Cytosine

• Adenine

• Thymine

In the color-coded explanation, which color represents the pairing of adenine with thymine?

• Green

• Blue

• Red

• Yellow

What is the reading direction of a DNA strand?

• 4' to 2'

• 2' to 4'

• 5' to 3'

• 3' to 5'

What is the complementary strand direction if the original strand is 5' to 3'?

• 4' to 2'

• 2' to 4'

• 3' to 5'

• 5' to 3'