Front

What is the structure of DNA?

Back

DNA is a double helix formed by two strands of nucleotides twisted around each other.

Front

What are the three components of a nucleotide?

Back

A nucleotide consists of a phosphate group, a sugar (deoxyribose), and a nitrogenous base.

Front

What are the four nitrogenous bases in DNA?

Back

The four nitrogenous bases in DNA are Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).

Front

How do nitrogenous bases pair in DNA?

Back

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

Front

What is the role of the phosphate group in DNA?

Back

The phosphate group links the sugar of one nucleotide to the sugar of the next nucleotide, forming the backbone of the DNA strand.

Front

What is the significance of the sugar in a nucleotide?

Back

The sugar (deoxyribose) provides structural support and is part of the backbone of the DNA molecule.

Front

What is a gene?

Back

A gene is a segment of DNA that contains the instructions for making a specific protein.

Front

What is the function of DNA?

Back

DNA stores genetic information and provides the instructions for the development, functioning, growth, and reproduction of all living organisms.

Front

What is a chromosome?

Back

A chromosome is a long, continuous thread of DNA that contains many genes.

Front

How many nucleotides are in one strand of DNA?

Back

One strand of DNA can contain millions of nucleotides.