HomeworkLib
Question

Eukaryotes have repair systems that prevent mutations due to copying errors and exposure to mutagens. What...

Eukaryotes have repair systems that prevent mutations due to copying errors and exposure to

mutagens. What are the three excision-repair systems found in eukaryotes, and which one is

responsible for correcting thymine-thymine dimers that form as a result of UV light damage to DNA?

science   biology   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

The three DNA repair mechanisms are

  • Base-excision repair
  • Nucleotide-excision repair
  • Mismatch repair

Among these, nucleotide-excision repair mechanism is involved in the thymine thymine dimer repair, which is formed due to the exposure of UV light.

0 0
Add a comment
Know the answer?
Add Answer to:
Eukaryotes have repair systems that prevent mutations due to copying errors and exposure to mutagens. What...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 1. How would a mutation in the poly(A)-binding protein gene affect translation? How would an electron...

    1. How would a mutation in the poly(A)-binding protein gene affect translation? How would an electron micrograph of polyribosomes from such a mutant differ from the normal pattern? 2. Eukaryotes have repair systems that prevent mutations due to copying errors and exposure to mutagens. What are the three excision-repair systems found in eukaryotes, and which one is responsible for correcting thymine-thymine dimers that form as a result of UV light damage to DNA? 3. What is the name given to...

  • can you guys please give me the correct answers and explain why? 3. Which of the...

    can you guys please give me the correct answers and explain why? 3. Which of the following statements is CORRECT? A. Exposure of E.coli to UV light greatly increases the frequency of cytosine deamination B. Mutagens that intercalate into the double helix lead to the formation of thymine dimers. C) Oxidative damage to DNA usually leads to the formation of frameshift mutations. D. Some alkylating agents are mutagenic because they chemically modify amino acids in the active site of DNA...

  • 1)Repairing damaged DNA is essential to maintaining the integrity of the genome. One type of repair...

    1)Repairing damaged DNA is essential to maintaining the integrity of the genome. One type of repair is known as nucleotide excision repair. In this system, which order do the necessary enzymes act? A) exonuclease, DNA polymerase III, RNA primase B) helicase, DNA polymerase I, DNA ligase C) DNA ligase, nuclease, helicase D) DNA polymerase I, DNA polymerase III, DNA ligase E) endonuclease, DNA polymerase II, DNA ligase 2) What might be the result if all cells had functioning telomerase? A)...

  • Now that the sunny weather is almost here, it's timely to consider that mutations that inactivate...

    Now that the sunny weather is almost here, it's timely to consider that mutations that inactivate nucleotide-excision repair (NER) have been associated with several genetic diseases, such as xeroderma pigmentosum (XP). In humans, NER is the sole repair pathway for cyclobutane pyrimidine photodimers, and thus people with XP are highly sensitive to light and are predisposed to sunlight-induced skin cancers. A) In many microorganisms there is another pathway for repairing pyrimidine photodimers. What is it? B) A consequence of the...

  • Now that the sunny weather is almost here, it's timely to consider that mutations that inactivate...

    Now that the sunny weather is almost here, it's timely to consider that mutations that inactivate nucleotide-excision repair (NER) have been associated with several genetic diseases, such as xeroderma pigmentosum (XP). In humans, NER is the sole repair pathway for cyclobutane pyrimidine photodimers, and thus people with XP are highly sensitive to light and are predisposed to sunlight-induced skin cancers. A) In many microorganisms there is another pathway for repairing pyrimidine photodimers. What is it? B) A consequence of the...

  • 1. You have used a mutagen to induce mutations in a DNA sequence.  If the original DNA...

    1. You have used a mutagen to induce mutations in a DNA sequence.  If the original DNA strand is 5'-ATGGGACTAGATACC-3', then which of the following represents a nonsense mutation? (1pt) 5'-ATGGGTCTAGATACC-3' 5'-ATGCGACTAGATACC-3' 5'-ATGTGACTAGATACC-3' 5'-ATGGGACTAAGATACC-3' 2. A mutation that changes a codon sequence, and subsequently changes the amino acid that should have been placed at that point in the polypeptide chain, is called a… (1pt) silent mutation frameshift mutation missense mutation nonsense mutation 3. Excision repair corrects DNA by (1pt) correcting A=T...

  • You have found a strain of microorganism, Schizosaccharomyces spp that is very sensitive to mutagenic compounds....

    You have found a strain of microorganism, Schizosaccharomyces spp that is very sensitive to mutagenic compounds. When grown in the presence of known mutagens this organism produces many mutant progeny. This microbe, initially isolated from beer-stained carpeting from Zach’s apartment, is obviously deficient in repairing damage to DNA. You perform a series of experiments to determine which repair system is defective. A. You first take two identical cultures and expose them to 30 minutes of irradiation. You place one of...

  • Prokaryotic mRNA usually encodes for more than one protein while eukaryotic mRNA a single protein. Eukaryotic...

    Prokaryotic mRNA usually encodes for more than one protein while eukaryotic mRNA a single protein. Eukaryotic DNA is linear and bacterial and archaeal DNA is-linear. In prokaryotes, ribosomes attach to the mRNA and start protein synthesis even before transcription is completed. Eukaryotic mRNA, rRNA, and tRNA are all highway processed. Nuclear pore complexes control the entry and exit to and from the nucleus. They will not let mRNA exit the nucleus before it is full processed. Eukaryotic and archaeal DNA...

  • write a summary after that answer the questions CASE 3.3 United Way of America In 1887,...

    write a summary after that answer the questions CASE 3.3 United Way of America In 1887, several of Denver's community and religious leaders established the Charity Organization Society. During its first year of operation, the organization raised a little more than $20,000, which it then distributed to several local charities. The charity-of-charities fundraising concept spread across the United States over the fol- lowing decades. After several name changes, the original Denver-based organization adopted the name United Way in 1963. United...

  • 1. Which of the following are the sites within the human body where carbon dioxide and...

    1. Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules 2. Which of the following describes the most important reason for repeating an experimental investigation? A. To verify the validity of the original findings B. To expand upon the original investigation C. To manipulate the independent variable D. To attempt to disprove the hypothesis 3. Lithium has an atomic number of 3 and...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT