DNA and Genetic Code Quiz

What is the primary function of DNA in living organisms?

• To store genetic information

• To provide energy

• To transport oxygen

• To digest food

Which structure is described as an elegant, twisted ladder in the context of DNA?

• Double helix

• Single strand

• Triple helix

• Quadruple strand

What are the four nitrogenous bases that comprise the genetic code?

• Adenine, Thymine, Guanine, Cytosine

• Adenine, Uracil, Guanine, Cytosine

• Thymine, Uracil, Guanine, Cytosine

• Adenine, Thymine, Uracil, Cytosine

How many hydrogen bonds does adenine form with thymine?

• Two

• Three

• Four

• One

What is a codon?

• A sequence of three nucleotides

• A single nucleotide

• A sequence of five nucleotides

• A pair of nucleotides

How many possible codons can be formed from the four bases?

• 64

• 20

• 16

• 32

What is the function of the codon AUG in protein synthesis?

• It codes for leucine and acts as a stop codon.

• It codes for methionine and acts as a start codon.

• It codes for valine and acts as a start codon.

• It codes for glycine and acts as a stop codon.

Which of the following codons act as stop codons in protein synthesis?

• AUG, UAA, UGA

• UAA, UAG, UGA

• UAG, AUG, UGA

• UAA, UAG, AUG

What is the role of RNA polymerase during transcription?

• It synthesizes DNA from RNA.

• It binds to ribosomes to initiate translation.

• It binds to DNA and synthesizes mRNA.

• It unwinds RNA strands for replication.

Where does transcription occur within a cell?

• In the cytoplasm

• In the ribosome

• In the nucleus

• In the mitochondria