Unit 6: Gene Expression (part 1)

All 14 questions and answers

1. Enzyme that unwinds and separates the two DNA strands by breaking hydrogen bonds?

   Answer: Helicase

2. Enzyme that prevents the DNA from over-winding (supercoiling) ahead of the replication fork?

   Answer: Topoisomerase

3. Proteins that bind to DNA strands to keep them from re-annealing (snapping back together)?

   Answer: Single-Strand Binding Proteins (SSBs)

4. Enzyme that lays down an RNA primer to give DNA Polymerase a starting point?

   Answer: Primase

5. Main enzyme that adds DNA nucleotides in the 5' to 3' direction?

   Answer: DNA Polymerase III

6. Enzyme that removes the RNA primers and replaces them with DNA nucleotides?

   Answer: DNA Polymerase I

7. Enzyme that acts as "glue" to join Okazaki fragments on the lagging strand?

   Answer: Ligase

8. Concept that each new DNA molecule consists of one old strand and one new strand?

   Answer: Semiconservative Replication

9. The rule that adenine always pairs with thymine, and cytosine with guanine?

   Answer: Complementary Base Pairing

10. Type of bond that holds paired bases together across the two strands of the helix?

    Answer: Hydrogen Bonds

11. Type of bond that holds the sugar-phosphate backbone together?

    Answer: Phosphodiester Bonds (Covalent)

12. The process of copying a DNA template into mRNA?

    Answer: Transcription

13. The process of using mRNA to build a polypeptide chain (protein)?

    Answer: Translation

14. Non-coding sequences removed from pre-mRNA during processing?

    Answer: Introns

Play it as a class game

Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options are other answers from the same set.

• Boss Battle
• Racer
• Kaboom
• Sabotage
• Throne
• Splycr
• Cryo
• Outbreak