DNA HISTORY & STRUCTURE

Front

What did Erwin Chargaff conclude from his experiments?

Back

A and T, C and G always occur in equal amounts.

Front

What are the three main components of a nucleotide?

Back

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

Front

What is the structure of DNA?

Back

DNA is a double helix composed of two strands of nucleotides.

Front

Where is DNA located inside of cells?

Back

In the nucleus.

Front

What was Watson and Crick's main scientific accomplishment?

Back

Building the first accurate model of DNA.

Front

In eukaryotes, which organelle is DNA usually found in?

Back

Nucleus.

Front

What are the four nitrogenous bases in DNA?

Back

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

Front

What is the significance of Chargaff's rules?

Back

They indicate that the amount of adenine equals thymine and the amount of cytosine equals guanine in DNA.

Front

What is the role of the phosphate group in a nucleotide?

Back

It links the sugar of one nucleotide to the sugar of another, forming the backbone of the DNA strand.

Front

What is the function of DNA in cells?

Back

DNA stores genetic information and provides instructions for the development and functioning of living organisms.