DNA History & Structure

Front

What are the components of a nucleotide?

Back

A nucleotide is made of three components: a sugar, a phosphate group, and a nitrogen base.

Front

Who is known for producing the famous Photo 51 of DNA?

Back

Rosalind Franklin is known for producing Photo 51, which was crucial in understanding DNA's structure.

Front

How did Rosalind Franklin's Photo 51 contribute to DNA research?

Back

Photo 51 was used by Watson and Crick to determine the physical structure of DNA.

Front

What did Erwin Chargaff's work help Watson and Crick to understand?

Back

Erwin Chargaff's work helped Watson and Crick determine the rules of nitrogen base pairing.

Front

What is the structure of a DNA molecule?

Back

A DNA molecule is best described as a double helix.

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 significance of the double helix structure of DNA?

Back

The double helix structure allows DNA to be stable and compact, facilitating replication and encoding genetic information.

Front

What is the role of sugar in a nucleotide?

Back

The sugar in a nucleotide (deoxyribose in DNA) forms the backbone of the DNA strand, linking with phosphate groups.

Front

What is the function of the phosphate group in DNA?

Back

The phosphate group links the sugar molecules of adjacent nucleotides, forming the DNA backbone.

Front

What is Chargaff's rule?

Back

Chargaff's rule states that in DNA, the amount of Adenine equals Thymine, and the amount of Cytosine equals Guanine.