DNA Replication

Question 1

What is the term for the method of DNA replication where half of the strands in each new DNA molecule are from the original DNA molecule?

Answer 1

Semi-conservative replication

This method ensures that each new DNA molecule contains one original and one newly synthesized strand.

Question 2

What enzyme is responsible for breaking hydrogen bonds between bases during DNA replication?

Answer 2

DNA helicase

This enzyme unwinds the DNA double helix to allow replication.

Question 3

What is the role of DNA polymerase in DNA replication?

Answer 3

Catalyzes condensation reactions to join adjacent nucleotides

DNA polymerase also helps in forming hydrogen bonds between complementary bases.

Question 4

What structure do DNA and RNA share as types of nucleic acids?

Answer 4

Polymer of nucleotides

Both consist of pentose sugar, nitrogenous bases, and a phosphate group.

Question 5

Fill in the blank: DNA is structured as a _______ held by hydrogen bonds.

Answer 5

Double helix

This structure consists of two antiparallel strands.

Question 6

What are the base pairs in DNA?

Answer 6

• Adenine - Thymine
• Cytosine - Guanine

These pairs are held together by hydrogen bonds.

Question 7

What happens during the first step of DNA replication?

Answer 7

DNA untwists

This is facilitated by the enzyme DNA helicase breaking hydrogen bonds.

Question 8

What is a mutation?

Answer 8

Changes in the genome that can occur during DNA replication

Mutations can lead to variations in genetic information.

Question 9

List examples of DNA mutations.

Answer 9

• Substitution
• Deletion
• Addition
• Duplication
• Inversion
• Translocation

Each type of mutation alters the DNA sequence in different ways.

Question 10

True or False: DNA replication is carefully controlled to preserve genetic information.

Answer 10

True

Despite this control, mutations can still occur.

Question 11

What is the significance of polypeptides in relation to proteins?

Answer 11

They change tertiary structure

This change can impact the function of enzymes.

Question 12

What must students do to complete the participation assessment worth 5%?

Answer 12

Complete every question of the quiz at the end of each lecture

Participation is mandatory, but correctness is not required.

Question 13

Fill in the blank: If unable to attend the lecture for medical reasons, students must _______.

Answer 13

Email the instructor directly

This ensures proper communication regarding attendance.

Question 14

What should students do if they do not have a mobile phone in the lecture?

Answer 14

Ask for a paper copy of the quiz at the START of the lecture

Failing to do so may result in being marked as non-participating.

Question 15

What is the recommended reading for today’s lecture on DNA replication?

Answer 15

Pages 55-58 of the course material

Students should make notes from this reading.

Question 16

What types of practice questions are suggested for students to complete on Bright Space?

Answer 16

• MCQ
• SAC
• LAQ

These formats help reinforce learning and understanding of the material.

Question 17

What should students do after the lecture to enhance their understanding?

Answer 17

Re-write their lecture notes

This practice can aid retention and comprehension.