Bases and Base Pairing

What are the proper complementary base-pairs?

• A--T and G--C

• A--G and C--T

• G--T and A--C

• A--C and T--G

T A G G A C T

The complementary strand is...

• T A G G A C T

• A T G G T G A

• A T C C T G A

• T T C C A G T

If a strand of DNA has 39% Cytosine, it has...

• 39% Adenine

• 39% Guanine

• 39% Thymine

• 39% combined Cytosine and Guanine

The following are true about DNA:

• single helix, deoxyribose, GCAU

• single helix, deoxyribose, GCAT

• double helix, ribose, GCAU

• double helix, deoxyribose, GCAT

If there is combined 60% for Cytosine and Guanine, what is the combined % for Adenine and Thymine?

• 60%

• 40%

• 20%

• 10%

Tags

NGSS.HS-LS3-1

What is the first step of DNA Replication?

• Helicase unwinds the DNA strands

• DNA polymerase adds nucleotides

• RNA polymerase adds nucleotides

• Helicase zips up the DNA

What enzymes are involved in DNA replication?

• helicase, catalase

• RNA polymerase, catalase

• helicase, DNA polymerase

• DNA polymerase, catalase

How many nucleotide bases are there?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS3-1

How many DNA molecules does replication start with, and end with?

• 2 --> 1

• 1 --> 2

• 2 --> 4

• 10 --> 20

What is the DNA compliment of this sequence?

GCAATCA

• CGTTGT

• CGTTTA

• CGAAAT