Nucleic Acids and Related Enzymes Quiz

What is the primary structural feature of DNA that is essential to life?

• Quadruple helix

• Single helix

• Triple helix

• Double helix

Which component is NOT part of a nucleotide?

• Sugar ring

• Amino acid

• Nitrogenous base

• Phosphate group

Which of the following is a purine?

• Cytosine

• Uracil

• Thymine

• Adenine

What type of bond holds the two strands of DNA together?

• Hydrogen bonds

• Metallic bonds

• Covalent bonds

• Ionic bonds

What is the term for the orientation of DNA strands?

• Convergent

• Perpendicular

• Anti-parallel

• Parallel

Which base is found in RNA but not in DNA?

• Thymine

• Uracil

• Guanine

• Adenine

What is the primary function of DNA polymerase?

• Cleaving DNA strands

• Unwinding DNA

• Synthesizing nucleic acids

• Joining DNA strands

Which enzyme is responsible for unwinding DNA?

• Nuclease

• Polymerase

• Helicase

• Ligase

What is the role of DNA ligase?

• Unwinding DNA

• Breaking DNA strands

• Synthesizing RNA

• Joining DNA strands

Which enzyme cleaves DNA at internal sites?

• Endonuclease

• Exonuclease

• Helicase

• Ligase