DNA structure and replication

Which of the following scientists helped discover that the structure of DNA was a double-stranded helix?

• Watson and Crick

• Hershey and Chase

• Fredrick Griffith

• Oswald Avery

What type of macromolecule are DNA and RNA?

• carbohydrate

• lipid

• protein

• nucleic acid

What is the monomer of DNA and RNA?

• amino acid

• ATP

• nucleotide

• gene

Select the 3 parts of a nucleotide?

• sugar

• phosphate

• phospholipid

• protein

• nitrogen base

Which of the following could be a DNA nucleotide?

• deoxyribose, phosphate, uracil

• ribose, phosphate, adenine

• deoxyribose, phosphate, cytosine

• ribose, phosphate, thymine

If your DNA molecule has 32% Adenine nitrogen base, how much thymine will it have?

• 68%

• 24%

• 32%

• there is no way to tell how much

What 2 parts of the nucleotide are connected to create the backbone?

• sugars and nitrogen bases

• phosphates and nitrogen bases

• sugars and phosphates

• nitrogen base to nitrogen base

Which of the following are correct pairs of complimentary bases for a molecule of DNA according to Chargaff's rule?

• A-C and G-T

• A-G and T-C

• A-U and C-G

• A-T and C-G

What sugar molecule is always present in a DNA nucleotide?

• ribose

• deoxyribose

• glucose

• thymine

What is # 2 in the diagram?

• phosphate

• nitrogen base

• sugar

• nucleotide