Macromolecules and DNA Functions

Which of the following is not a type of macromolecule?

• Carbohydrates

• Lipids

• Proteins

• Vitamins

What is the shape of the DNA molecule?

• Single helix

• Double helix

• Triple helix

• Linear strand

During DNA replication, which enzyme is responsible for unwinding the DNA double helix?

• DNA polymerase

• Helicase

• Ligase

• Primase

What is the role of DNA polymerase in DNA replication?

• To unwind the DNA strand

• To synthesize new DNA strands

• To join Okazaki fragments

• To add RNA primers

Which of the following is a characteristic of enzymes?

• They are ruined in the reaction

• They lower the activation energy of a reaction

• They are made of nucleic acids

• They are not specific to substrates

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

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Peptide bonds

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

• 5'-TAGC-3'

• 3'-TAGC-5'

• 5'-CGAT-3'

• 3'-CGAT-5'

Which macromolecule is responsible for storing and transmitting genetic information?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

Which enzyme is responsible for attaching new nucleotides, proofreading and correcting errors during DNA replication?

• DNA polymerase

• Helicase

• Ligase

• Primase

What is the main structural difference between RNA and DNA?

• RNA is double-stranded, DNA is single-stranded

• RNA contains uracil, DNA contains thymine

• RNA contains deoxyribose, DNA contains ribose

• RNA is more stable than DNA