DNA Structure and Replication

Front

What is the structure of DNA?

Back

DNA is a double helix made up of two strands that wind around each other, consisting of a sugar-phosphate backbone and nitrogenous bases in the center.

Front

What are the four nitrogenous bases in DNA?

Back

Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).

Front

What is the base pairing rule in DNA?

Back

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

Front

What is the role of DNA polymerase?

Back

DNA polymerase is the enzyme responsible for adding free nucleotides to the growing DNA strand during replication.

Front

What type of bond joins nitrogenous bases in DNA?

Back

Hydrogen bonds.

Front

What makes up the rungs of the DNA ladder?

Back

The rungs of the DNA ladder are made up of nitrogenous bases.

Front

How many thymine bases are present if there are 1500 adenine bases in a DNA molecule?

Back

There will be 1500 thymine bases due to the base pairing rule.

Front

What is the function of DNA helicase?

Back

DNA helicase unwinds and separates the two strands of DNA during replication.

Front

What is the sugar component of DNA?

Back

The sugar in DNA is deoxyribose.

Front

What is the significance of the phosphate group in DNA?

Back

The phosphate group forms part of the backbone of the DNA structure, linking sugars together.