Genetic Code Quiz

What is the genetic code made up of?

• A sequence of proteins in the cell membrane

• A sequence of DNA nucleotides in the nucleus of cells

• A sequence of RNA nucleotides in the cytoplasm

• A sequence of carbohydrates in the cell wall

What are the three components of a DNA nucleotide?

• Phosphate group, sugar (ribose), nitrogenous base

• Phosphate group, sugar (deoxyribose), nitrogenous base

• Amino group, sugar (deoxyribose), nitrogenous base

• Phosphate group, sugar (deoxyribose), amino acid

Which sugar is found in a DNA nucleotide?

• Glucose

• Ribose

• Deoxyribose

• Fructose

What are the nitrogenous bases that can be found in a DNA nucleotide?

• A, T, G, U

• A, U, C, G

• A, T, G, C

• A, B, C, D

Which of the following nitrogen bases is a purine?

• Cytosine (C)

• Thymine (T)

• Adenine (A)

• Uracil (U)

How many rings does a pyrimidine nitrogen base have?

• Two

• Three

• One

• Four

Which nitrogen base is found only in RNA?

• Adenine (A)

• Guanine (G)

• Thymine (T)

• Uracil (U)

What is the structure of adenine?

• Single ring

• Double ring

• Triple ring

• No ring

Why do purine always pair with pyrimidines?

• Because purine can form ionic bonds with pyrimidines.

• Due to the structural properties of purine.

• Because purine and pyrimidines are both double-ringed structures.

• Purine pairs with pyrimidines to balance the pH level of DNA.

How many hydrogen bonds does adenine form with thymine?

• One

• Two

• Three

• Four