Basic DNA structure

What makes up the backbone of DNA molecules?

• Nucleotides

• Nitrogenous bases and phosphate groups

• Sugar and Phosphate groups

• Nitrogenous bases and sugars

Adenine pairs with...

• Guanine

• Cytosine

• Thymine

• Uracil

If I have 20% Adenine, what percent cytosine do I have?

• 30%

• 40%

• 60%

• 20%

The nitrogenous bases are held together by what type of bonds?

• Phosphodiester Bonds

• Hydrogen Bonds

• Covalent Bonds

• Ionic Bonds

DNA synthesis happens during what phase?

• G1

• S

• G2

• Metaphase

The fact that the backbone runs from 5' to 3' on one strand and 3' to 5' on the other strand shows that DNA is...

• Antiparallel

• Parallel

• Semi - Conservative

• Double Helix shape

Adenine and Thymine have how many hydrogen bonds between them?

• 2

• 3

• 4

• 1

How many hydrogen bonds are between Guanine and Cytosine?

• 2

• 3

• 4

• 1

What composes a nucleotide? (pick all that apply)

• 5 Carbon Sugar

• Phosphate group

• Nitrogenous base

• Amino Acid

What sugar is present in DNA?

• a 5 Carbon Pentose sugar, Deoxyribose

• a 5 Carbon Pentose sugar, Ribose

• a Phosphate sugar, Deoxyribose

• a Nitrogen base sugar, Deoxyribose