DNA Structure and Replication Review

Front

What is the role of DNA helicase?

Back

DNA helicase unzips strands of DNA by breaking hydrogen bonds between the base pairs.

Front

If the percentage of Adenine in a DNA sample is 27%, what is the percentage of Guanine?

Back

23% (According to Chargaff's rules, the percentage of Guanine is equal to the percentage of Cytosine, and the total percentage of A + T = G + C = 100%).

Front

What structure did Watson and Crick propose for DNA?

Back

Watson and Crick proposed that DNA is a double helix.

Front

Where is DNA primarily located in a eukaryotic cell?

Back

DNA is primarily located in the nucleus of a eukaryotic cell.

Front

What are the three parts of a nucleotide?

Back

The three parts of a nucleotide are a phosphate group, a sugar (deoxyribose), and a nitrogenous base.

Front

What is the function of DNA polymerase during DNA replication?

Back

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

Front

What is the significance of the double helix structure of DNA?

Back

The double helix structure allows for the efficient storage of genetic information and the accurate replication of DNA.

Front

What are Okazaki fragments?

Back

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

Front

What is the base pairing rule in DNA?

Back

The base pairing rule states that Adenine pairs with Thymine (A-T) and Cytosine pairs with Guanine (C-G).

Front

What is the role of ligase in DNA replication?

Back

Ligase joins Okazaki fragments together to create a continuous DNA strand.