Which repair systems are most likely responsible for the
appearance of mutation after intense UV exposure
explain?
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Which repair systems are most likely responsible for the appearance of mutation after intense UV ...
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...
Results A. Effect of UV Radiation Record the results for each plate at follows (see images below): (-) no growth 1+ light growth 2+ medium growth 3+ heavy growth Also, note any differences in appearance of growth on cach of the plates. 15 30 60 ates) Bacteria Lid off UV light exposure time Lid off Lid off Lid off 15 sec 30 sec 60 sec O sec Lid on 60 sec (control) Serratia marcescens Based on these results, answer the...
1. Which repair mechanism is most likely affected if the enzyme DNA glycosylase is not functioning properly? photoreactivation repair base excision repair SOS repair double-strand break repair nucleotide excision repair 2. In bacteria and eukaryotes, a mutation is when ________. In bacteria and eukaryotes, a mutation is when ________. A.the nucleotide sequence in an mRNA molecule is directly changed B.the nucleotide sequence in a DNA molecule is directly changed C.the amino acid sequence in a protein molecule is directly changed...
Which mutation is most likely to become fixed? a. A neutral or nearly neutral mutation in an extremely large population b. A beneficial mutation in an extremely large population c. A neutral or nearly neutral mutation in an extremely small population d. A beneficial mutation in an extremely small population
Which mutation is most likely to have a severe impact on the phenotype of an organism if it occurs within the first several bases of a gene coding region? A) a frameshift mutation of three nucleotides B) a missense mutation affecting one nucleotide C) a missense mutation affecting three nucleotides D) a silent mutation affecting one nucleotide E) a frameshift mutation of one nucleotide
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Which of the elements is most likely responsible for the following successive ionization energies? 1E1 E2 E3 E4 kJ/mol 900 1760 14850 21010 - zo
Suppose that a person has a mutation in a gene that encodes an enzyme responsible for the production of histamine. In this person, mast cells cannot produce and secrete histamine. Which of the following outcomes is most likely to happen if an injury occurs? a. Neutrophils will not be able to phagocytose pathogens at the injury site. b. Neutrophils will not be attracted to the injury site. c. Macrophages will not be able to secrete signaling molecules. d. Macrophages will...
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...
Estimate which absorption transition will be the most intense. Explain, using the Franck-Condon principle, your statement. Answer: (b) Estimate which fluorescence transition will be the most intense. Explain, using the Franck-Condon principle, your statement. Answer: (c) In this example, is the geometry of the excited state close to that of the ground state or not? Explain your answer.
1. Which is most likely to have a high processivity? all of these a SSB a DNA polymerase that is a main polymerizing enzyme a DNA polymerase that is primarily a repair enzyme a DNA ligase 2. For Messelson-Stahl experiments: Which type of DNA forms a band at the top of the centrifuge tube after ultracentrifugation in a CsCl gradient? DNA containing the isotope 14N only DNA containing both 14N and 15N DNA containing the isotope 15N only none of...