DNA and Replication Vocabulary

Which statement best defines a nucleotide in DNA?

• Monomer of phosphate, sugar, and a nitrogenous base

• Double helix unit formed by two antiparallel strands

• Enzyme that builds a complementary DNA strand

• Polymer that encodes traits in organisms

Which pairing follows the nitrogenous base pairing rules in DNA?

• A pairs with G; C pairs with T

• A pairs with U; G pairs with C

• A pairs with T; G pairs with C

• A pairs with C; G pairs with T

Which term describes DNA’s overall shape?

• Triple helix twisted rope

• Double helix twisted ladder

• Single helix straight chain

• Quadruple helix braided strand

Which two bases are purines in DNA?

• Adenine and Guanine

• Cytosine and Thymine

• Guanine and Thymine

• Adenine and Cytosine

Which two bases are pyrimidines in DNA?

• Adenine and Guanine

• Guanine and Thymine

• Cytosine and Thymine

• Adenine and Cytosine

What does antiparallel mean for DNA strands?

• Strands form identical sequences during replication

• Strands run in identical directions side by side

• Strands run in opposite directions along the helix

• Strands pair by hydrogen bonds at equal angles

Which enzyme separates DNA strands by breaking hydrogen bonds?

• Primase

• Polymerase

• Helicase

• Ligase

Where does DNA replication begin on a chromosome?

• Replication fork region

• 5’ end terminal cap

• Okazaki fragment start

• Origin of replication site

What forms at the place where helicase opens the DNA double helix?

• Primer junction

• Replication fork

• Okazaki fragment

• Leading strand

Which enzyme synthesizes the new DNA strand during replication?

• DNA polymerase

• Helicase

• Topoisomerase

• RNA polymerase