DNA Structure and Replication Review

Front

What is the shape of the DNA molecule?

Back

The DNA molecule has a spiral shape, often described as a double helix.

Front

What is the first step in DNA replication?

Back

The first step in DNA replication is when DNA helicase unzips the DNA.

Front

What structure is represented by the phosphate group in DNA?

Back

The phosphate group is one of the three components of a nucleotide, which also includes a sugar and a nitrogen base.

Front

What type of bond holds the nitrogen bases together in DNA?

Back

Hydrogen bonds hold the nitrogen bases together in the DNA structure.

Front

After replication, how many strands of DNA do we have?

Back

After replication, there are 2 strands of DNA.

Front

What are the three components of a nucleotide?

Back

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

Front

What are the four nitrogen bases found in DNA?

Back

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

Front

What is the role of DNA polymerase in DNA replication?

Back

DNA polymerase adds complementary nucleotides to the growing DNA strand during replication.

Front

What is the function of DNA ligase?

Back

DNA ligase connects the Okazaki fragments on the lagging strand during DNA replication.

Front

What is the significance of the antiparallel structure of DNA?

Back

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