Biology Quiz

What makes up the backbone of DNA?

• Sugar and phosphate

• Sugar and nitrogen bases

• Phosphate and nitrogen bases

• Sugar and proteins

Which enzyme unwinds the DNA during replication?

• Polymerase

• Helicase

• Ligase

• Primase

What nitrogen base does RNA have that DNA does not?

• Thymine

• Adenine

• Cytosine

• Uracil

Which type of RNA carries the genetic code from the DNA to the ribosome?

• tRNA

• mRNA

• rRNA

• sRNA

What type of mutation occurs when a nitrogen base changes but the associated amino acid remains the same?

• Missense mutation

• Frameshift mutation

• Silent mutation

• Nonsense mutation

What are the repeating subunits that build DNA?

• Nucleotides

• Amino acids

• Polymers

• Proteins

Which nitrogen base pairs with Guanine in the DNA structure?

• Thymine

• Cytosine

Which base pairs with Adenine in the DNA structure?

• Guanine

• Thymine

• Cytosine

• Uracil

Which process transfers genetic information from DNA to RNA?

• Translation

• Transcription

• Replication

• Mutation

What enzyme adds complementary nucleotides during DNA replication?

• Ligase

• Helicase

• Polymerase

• Primase