DNA Base Pairing and Complementarity

The video tutorial explains how to write the complementary strand for a given DNA sequence. It covers the rules for writing complementary strands, including the anti-parallel nature of DNA and base pairing rules. The tutorial answers specific questions about identifying bases at the 3' and 5' ends of the complementary strand and calculating the percentage composition of AT and GC base pairs.

What is the main topic discussed in the video?

• How to sequence RNA

• How to calculate molecular weight

• How to write complementary DNA strands

• How to synthesize proteins

Which rule explains the directionality of DNA strands?

• DNA strands are anti-parallel

• DNA strands are perpendicular

• DNA strands are parallel

• DNA strands are circular

Which base pairs with adenine in DNA?

• Thymine

• Uracil

• Cytosine

• Guanine

What are the first five bases at the 3' end of the complementary strand?

• T A C G T

• C G T A G

• G T G C A

• A T G C A

What is the third base at the 3' end of the complementary strand?

• G

• T

• C

• A

What are the first ten bases at the 5' end of the complementary strand?

• A A G C T G G A A T

• G T G C A T C G A

• A A G C T G G A A

• T C G A A G C T G

What is the seventh base at the 5' end of the complementary strand?

• A

• G

• C

• T

What is the percentage of AT base pairs in the DNA strand?

• 40%

• 70%

• 50%

• 60%

How many AT base pairs are present in the DNA strand?

• 14

• 8

• 10

• 12

What is the percentage of GC base pairs in the DNA strand?

• 30%

• 40%

• 50%

• 60%