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DNA Repair SI

Total questions: 25

Worksheet time: 17mins

Name
Class
Date
1.

What type of repair pathway would repair replication errors?

a)

Base Excision Repair

b)

Nucleotide Excision Repair

c)

Mismatch Repair

d)

Homologous Recombination

2.

What type of repair pathway would repair oxidative damage?

a)

Base Excision Repair

b)

Nucleotide Excision Repair

c)

Mismatch Repair

d)

Homologous Recombination

3.

What type of repair pathway would repair UV-induced damage?

a)

Base Excision Repair

b)

Nucleotide Excision Repair

c)

Mismatch Repair

d)

Homologous Recombination

4.

Who am I? I recognize a damaged nucleotide(s) that was damaged by oxidative damaged or alkylation & will flip the base out to cleave it out

a)

DNA glycosylase

b)

XPC

c)

EXO1

d)

APE1

5.

Who am I? I recognize abasic sites and cleave the abasic site to remove the sugar phosphate group & create a nucleotide gap

a)

OGG1

b)

XPC

c)

EXO1

d)

APE1

6.

Who am I? I bind the bulky lesion after it has been recognized by other proteins (I am sorry I know this one is hard but if you can draw out this pathway you will be so set)

a)

XPA

b)

XPG

c)

XPF

d)

XPC

7.

Choose all that are a source of DSBs (double-strand breaks)

a)

Ionizing radiation

b)

ROS

c)

Replication fork collapse

d)

CRISPR-Cas9 system

8.

If a cancer patient takes cisplatin (anti-tumor drug), what pathways will begin repair in the presence of interstrand crosslinks that are induced? (Multiple answers)

a)

NER

b)

BER

c)

Translesion synthesis (TLS)

d)

HR

9.

Who am I? I cap the ends of DSB for protection

a)

Ku

b)

MRN

c)

RAD51

d)

BRCA2

10.

Who am I? I sense double-stranded DNA damage such as a DSB

a)

ATM

b)

ATR

c)

OGG1

d)

APE1

11.

Who am I? I cause end resection with BRCA1 in HR

a)

BRCA2

b)

RAD51

c)

MRN

d)

Ku

12.

What pathway would be triggered by cisplatin (anti-tumor drug)

a)

BER

b)

HR

c)

NHEJ

d)

MMR

13.

What DSB repair would likely occur during the same cycle of DNA replication (S phase)?

a)

HR

b)

NHEJ

14.

What DSB repair would likely occur during G1?

a)

HR

b)

NHEJ

15.

Who am I? I recognize single mismatched base pairs

a)

MSH2/6

b)

MSH2/3

c)

EXO1

d)

APE1

16.

If you have a BRCA1/2 mutation, what repair pathway would you be deficient in?

a)

NHEJ

b)

BER

c)

NER

d)

HR

17.

If you have a XPC mutation, what repair pathway would you be deficient in?

a)

NHEJ

b)

BER

c)

NER

d)

HR

18.

If you had hereditary nonpolyposis colon cancer and you know it was due to a germline mutation, what do you likely have a deficiency in?

a)

MMR

b)

NER

c)

BER

d)

HR

19.

What type of DNA damage is typically repaired by mismatch repair (MMR)?

a)

Thymine dimers

b)

Base mismatches after replication

c)

Double-strand breaks

d)

Oxidized bases

20.

Ku70/Ku80 heterodimer is primarily involved in which pathway?

a)

NER

b)

BER

c)

NHEJ

d)

HR

21.

A patient has a mutation in XPA. Which repair pathway is defective?

a)

NER

b)

BER

c)

HR

d)

NHEJ

22.
  1. Oxidative damage like 8-oxoG forms during replication. Which repair fixes it?

a)

NER

b)

BER

c)

NHEJ

d)

HR

23.
  1. UV light causes pyrimidine dimers, repaired by:

a)

BER

b)

NER

c)

NHEJ

d)

HR

24.
  1. NHEJ is generally considered

a)
  • Error-free

b)
  • Error-prone

c)

Only for S-phase

d)
  • Only for M-phase

25.
  1. Holliday junction resolution occurs in:

a)

NER

b)

HR

c)

BER

d)

MMR