UV radiation causes covalent dimerization of two subsequent ______ bases in DNA. This dimer is recognized...
UV radiation causes covalent dimerization of two subsequent ______ bases in DNA. This dimer is recognized and repaired by ______.
Select one:
a. C and C ;;;; DNA photolyase
b. T and T ;;;;; DNA photolyase
c. C and C ;;;; DNA photoisomerase
d. T and T ;;;;; DNA photoisomerase
e. None of the above
Homework Answers
The answer will be option A. UV radiation causes dimerized CC to bind with AA causing problems. This is immediately repaired in seconds by DNA photolyase.
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UV radiation causes covalent dimerization of two subsequent
______ bases in DNA. This dimer is recognized...
Repair of DNA damage from UV radiation DNA damage from UV radiation needs to be repaired...
Repair of DNA damage from UV radiation
DNA damage from UV radiation needs to be repaired if
DNA replication occurs without error. the following plot shows how
cell survival is affected in the presence of UV radiation. Notice
that the wild-type cells can overcome the damaging effects of UV
radiation on DNA and show high survival even as UV increases.
However, cells deficient in certain genes display relatively much
lower survival rates.
1. the fact that the double mutant shows...
Match the following terms with their descriptions below. Question Selected Match Mutant allele is mutated to...
Match the following terms with their descriptions below. Question Selected Match Mutant allele is mutated to wild-type C. Reverse mutation Flat planar molecule able to sandwich between DNA bases A. Intercalator A region of DNA more likely to acquire mutations B. Hot spot Light-requiring thymine dimer repair mechanism D. Alkyltransferase Single-use repair of nitrogen mustard DNA alkylation E. Photoreactivation (18) Which of the following is incorrectly paired? A. UV light - Thymine dimer B. Imino form cytosine- Transition D. TNRE...
and Lab Exer n this experiment you will evaluate effect of UV light on bacterial growth. UV light affects growth by interfering with DNA, resulting in thymine dimer formation. The dimerization...
and Lab Exer n this experiment you will evaluate effect of UV light on bacterial growth. UV light affects growth by interfering with DNA, resulting in thymine dimer formation. The dimerization is confined within adjacent thymine residues on same strand (intrastrand ). These dimmer lesions have consequence on DNA functions including interference in DNA replication, transcription etc, so UV exposure of cells can lead to lethal effects for bacterial multiplications. This forms the basis for UV method to control bacterial...
Which of the following is true? a. The two strands of a DNA molecule are held...
Which of the following is true? a. The two strands of a DNA molecule are held together by covalent bonds. b. Hydrogen bonding between complementary base pairs causes the DNA molecule to twist into a spiral. c. A single strand within a DNA molecule is held together by hydrogen bonds. d. The bases on one strand of DNA are held to the bases on the other strand by hydrogen bonds.
Please answer the following questions Thanks! What type of bonds holds the two strands of a...
Please answer the following questions
Thanks!
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In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth?...
In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth? A. It damages DNA, inhibiting transcription and replication. B. It causes the cell membrane to rupture. C. It creates ions that damage biomolecules. D. It raises the temperature, killing temperature sensitive bacteria.
1. What component of a bacterial cell is injured by UV radiation? a. Cell wall b....
1. What component of a bacterial cell is injured by UV radiation? a. Cell wall b. Plasma membrane c. Ribosomes d. DNA Answer 2. Should everyone be sure to protect their eyes and skin from UV radiation? a. Yes b. No Answer 3. Which of the bacteria we are using in this lab is an endospore former? a. E. coli b. Bacills (cereus or subtilis) Answer 4. What is the purpose of using a 24 hour culture and 7 day...
15. The term that describes the directionality of the two strands in DNA Is A antidirectional...
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Deamination of a cytosine base in DNA results in a uracil base, which is disallowed in...
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6. There are two major theories of acids and bases in aqueous solutions: Arrhenius and Bronsted....
6. There are two major theories of acids and bases in aqueous solutions: Arrhenius and Bronsted. a) In your own words, briefly explain the main difference between the two theories of acids and bases b) Which theory do you think is the most useful in chemistry? Explain your choice. c) Which of the following is an Arrhenius acid? A) H2SO4: B) LiOH; C) NH2CH3; D) CH3CH3; E) More than one of these is an Arrhenius acid. d) Which of the...
Repair of DNA damage from UV radiation
DNA damage from UV radiation needs to be repaired if
DNA replication occurs without error. the following plot shows how
cell survival is affected in the presence of UV radiation. Notice
that the wild-type cells can overcome the damaging effects of UV
radiation on DNA and show high survival even as UV increases.
However, cells deficient in certain genes display relatively much
lower survival rates.
1. the fact that the double mutant shows...
and Lab Exer n this experiment you will evaluate effect of UV light on bacterial growth. UV light affects growth by interfering with DNA, resulting in thymine dimer formation. The dimerization is confined within adjacent thymine residues on same strand (intrastrand ). These dimmer lesions have consequence on DNA functions including interference in DNA replication, transcription etc, so UV exposure of cells can lead to lethal effects for bacterial multiplications. This forms the basis for UV method to control bacterial...
Please answer the following questions
Thanks!
What type of bonds holds the two strands of a DNA double helix together? Select one: a. covalent bonds b. hydrogen bonds c. ionic bonds d. peptide bonds e. sulfur bonds What subunits (monomers) make up DNA? Select one: a. Amino acids b. Water c. Peptides d. ATPs e. Nucleotides What type of molecules are responsible for uncoiling the DNA double helix to initiate DNA replication? Select one: a. Lipids b. Enzymes c. Carbohydrates...
In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth? A. It damages DNA, inhibiting transcription and replication. B. It causes the cell membrane to rupture. C. It creates ions that damage biomolecules. D. It raises the temperature, killing temperature sensitive bacteria.
1. What component of a bacterial cell is injured by UV radiation? a. Cell wall b. Plasma membrane c. Ribosomes d. DNA Answer 2. Should everyone be sure to protect their eyes and skin from UV radiation? a. Yes b. No Answer 3. Which of the bacteria we are using in this lab is an endospore former? a. E. coli b. Bacills (cereus or subtilis) Answer 4. What is the purpose of using a 24 hour culture and 7 day...
15. The term that describes the directionality of the two strands in DNA Is A antidirectional B polydirectional Csemiparallel D. antiparallel E ntisequencial 16. Which of the following enzymes synthesis new DNA during DNA replication? ADNA primase B. RNA polymerase CONA polymerase D Helicase E DNA ligase 17. Which of the following enzymes generates a covalent bond between Okazaki fragments? A DNA primase B. RNA polymerase C DNA polymerase D Helicase E. DNA ligase strand. 18. During DNA replication Okazaki...
6. There are two major theories of acids and bases in aqueous solutions: Arrhenius and Bronsted. a) In your own words, briefly explain the main difference between the two theories of acids and bases b) Which theory do you think is the most useful in chemistry? Explain your choice. c) Which of the following is an Arrhenius acid? A) H2SO4: B) LiOH; C) NH2CH3; D) CH3CH3; E) More than one of these is an Arrhenius acid. d) Which of the...
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