Thursday 02/27/25

In 1950 Dr. Chargaff ran a series of experiments to determine the chemical composition of DNA. The results lead to Chargaff's rule, which states that the amount of Thiamine is roughly equal to the amount of which nitrogenous base?

• Adenine

• Thiamine

• Cytosine

• Guanine

In 1950 Dr. Chargaff ran a series of experiments to determine the chemical composition of DNA. The results lead to Chargaff's rule, which states that the amount of Cytosine is roughly equal to the amount of which nitrogenous base?

• Adenine

• Thiamine

• Cytosine

• Guanine

In 1953, Watson and Crick published an article based largely on the unaccredited work of others that lead to the pair earning the 1963 Nobel Prize. In this publication, they described the shape of DNA as having a

• single stranded nature

• larger amount of adenine and thiamine

• circular structure
• double helix shape

In 1953, Watson and Crick published an article based largely on the unaccredited work of others that lead to the pair earning the 1963 Nobel Prize. In this publication, they described the shape of DNA as having

• a sugar-phosphate backbone

• nitrogenous bases attached to the phosphate groups

• nitrogenous bases attached to each other via hydrogen bonding

• nitrogenous bases attached to deoxyribose sugars

Label the nucleotide

a

b

c

Nitrogenous base

Phosphate

Sugar