DNA review

What is the shape of the DNA molecule?

• Single helix

• Double helix

• Triple helix

• Linear strand

Which molecule carries the genetic code from DNA to the ribosome?

• tRNA

• mRNA

• rRNA

• DNA

What is the function of DNA?

• To store genetic information

• To catalyze chemical reactions

• To transport proteins

• To provide energy

What is the role of RNA polymerase during transcription?

• It translates mRNA into proteins

• It synthesizes RNA from a DNA template

• It unwinds the DNA double helix

• It adds amino acids to tRNA

Which of the following is NOT a component of a DNA nucleotide?

• Phosphate group

• Sugar (deoxyribose)

• Nitrogenous base

• Amino acid

What is the start codon for protein synthesis?

• UAA

• UGA

• AUG

• UAG

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

• Ionic bond

• Covalent bond

• Hydrogen bond

• Peptide bond

What is the role of tRNA in protein synthesis?

• To carry amino acids to the ribosome

• To transcribe DNA into RNA

• To catalyze peptide bond formation

• To unwind DNA

Which of the following is a stop codon?

• AUG

• UAA

• GUA

• CCA

What is the complementary DNA strand for the sequence: 5'-ATGC-3'?

• 5'-TACG-3'

• 5'-CGTA-3'

• 5'-GCAT-3'

• 5'-UACG-3'