DNA Structure & DNA Replication Quiz

The sugar-phosphate backbone of DNA is

• antiparallel

• complementary

• semi-conservative

Which scientists helped to determine the structure of DNA:

• Rosalind Franklin

• James Watson and Francis Crick

• Erwin Chargaff

• All of them

DNA is made up of repeating individual units called

• lipids

• proteins

• nucleic acids

If a DNA molecule consists of 20% adenine, how much guanine will be present?

• 10%

• 20%

• 30%

• 40%

Answer explanation

Chargaff's rule: 20% adenine:20% thymine; so 60% left for cytosine and guanine. Divide 60% by 2 = 30%

According to the base pairing rules, adenine always pairs with ______________.

• guanine

• thymine

• cytosine

During DNA replication, the enzyme that adds complementary nucleotides to the new strand is called

• RNA primer

• DNA polymerase

Purines always bond with _________________.

• pyrimidines.

• other purines.

• thymine.

DNA is found within the ______________ of the cell.

• ribosomes

• nucleus

• golgi body

Tags

NGSS.MS-LS1-2

DNA stands for (a)  

What is the function of DNA?