DNA Structure & DNA Replication Quiz
Authored by Tina Trafton
Science
10th Grade
NGSS covered
Used 9+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The sugar-phosphate backbone of DNA is
antiparallel
complementary
semi-conservative
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which scientists helped to determine the structure of DNA:
Rosalind Franklin
James Watson and Francis Crick
Erwin Chargaff
All of them
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
DNA is made up of repeating individual units called
lipids
proteins
nucleic acids
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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%
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to the base pairing rules, adenine always pairs with ______________.
guanine
thymine
cytosine
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
During DNA replication, the enzyme that adds complementary nucleotides to the new strand is called
RNA primer
DNA polymerase
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Purines always bond with _________________.
pyrimidines.
other purines.
thymine.
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