DNA Structure and Replication

Front

What is the role of primase during DNA replication?

Back

It synthesizes a short RNA primer to initiate DNA synthesis.

Front

Which nitrogen bases are pyrimidines?

Back

Cytosine (C) and Thymine (T) are pyrimidines.

Front

What are the components of a DNA nucleotide?

Back

A DNA nucleotide consists of a sugar, a phosphate group, and a nitrogenous base.

Front

Which of the following is not a nitrogenous base in DNA?

Back

Uracil is not a nitrogenous base in DNA.

Front

Which nitrogen bases are purines?

Back

Adenine (A) and Guanine (G) are purines.

Front

What is the structure of DNA?

Back

DNA is a double helix composed of two strands of nucleotides.

Front

What are the base pairing rules in DNA?

Back

Adenine pairs with Thymine (A-T) and Cytosine pairs with Guanine (C-G).

Front

What enzyme unwinds the DNA helix during replication?

Back

Helicase unwinds the DNA helix.

Front

What is the function of DNA polymerase?

Back

DNA polymerase synthesizes new DNA strands by adding nucleotides.

Front

What are Okazaki fragments?

Back

Okazaki fragments are short segments of DNA synthesized on the lagging strand during replication.