DNA Structure and Replication Test Review

Front

What is the structure of a DNA molecule?

Back

A DNA molecule is structured as a double helix.

Front

What type of bond joins nitrogenous bases in DNA?

Back

Nitrogenous bases are joined by hydrogen bonds.

Front

What two molecules form the backbone of the DNA ladder?

Back

The backbone of the DNA ladder is formed by deoxyribose sugar and phosphate.

Front

What is the complementary DNA sequence for ATG TGA CAG?

Back

The complementary DNA sequence is TAC ACT GTC.

Front

Which enzyme is responsible for unzipping DNA by breaking hydrogen bonds?

Back

Helicase is the enzyme that breaks hydrogen bonds to unzip DNA.

Front

What are the four nitrogenous bases found in DNA?

Back

The four nitrogenous bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G).

Front

What base pairs with adenine in DNA?

Back

Thymine pairs with adenine in DNA.

Front

What is the role of DNA polymerase in DNA replication?

Back

DNA polymerase synthesizes new DNA strands by adding nucleotides complementary to the template strand.

Front

What is the function of ligase in DNA replication?

Back

Ligase joins Okazaki fragments on the lagging strand during DNA replication.

Front

What is the significance of the antiparallel nature of DNA strands?

Back

The antiparallel nature allows for proper base pairing and replication of DNA.