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1. Which of the following enzymes is directly involved in base excision repair mechanism of mutations?GlycosylasesCyclic Adenosine MonophosphateSerines KinasesHelicasesAlkytransferases2. Shown below is a list of types of repair systems or repair molecules (a-g) and types of DNA damage or mutations (1-6). On the blank line following each type of damage, write the letter(s) of all repair systems that can repair (or play a role in the repair of) that particular type of damage.a) Photolyaseb) Base-excision repairc) SOS repaird) Alkyltransferasese) Mismatch repairf) Homologous recombinationg) Nucleotide-excision repair1) Alkylation of G residues __________2) Trinucleotide repeat expansion__________3) Depurination __________4) Pyrimidine dimers __________5) Deamination __________6) Double-stranded breaks __________ 3. Determine which of the following repair pathways do not involve the use of a homology-dependent repair system?Base excision repairPhoto reactivation repairTranscription coupled repairNucleotide excision repairMismatch repair4. What repair system exists in cells to repair damage of a single base via homology dependent repair? Describe the mechanism of this repair system.5. Put the following events in order as they occur in recombination according to the "double-stranded-break model."a. Cleavage of Holliday structuresb. Formation of loop in uncut duplexc. DNA repair synthesis of second strandd. Strand invasione. Double-strand break of one chromatidf. Formation of Holliday structuresg. DNA repair synthesis of one strand
A 2.5 mg/ml stock solution was diluted as described in the table below and then the absorbance of each dilution was estimated and presented in the table given below.
What error did the new receptionist make that resuled in the insurance company refusing to pay for the hip x-rays describeyour answer
Find a virus capsid containing vimentin, your protein of interest, gets into the cell nucleus and is broken down with the DNA being released.
If all other variables remain constant, when 2-action potentials enter synaptic terminal and produce pair of EPSPs in the muscle fiber, larger EPSP is produce by the secretion of:
Was evolutionary pressure that contributed to the echinoderm nervous system development likely due to selection for those animals capable of forward locomotion?
Explain why are carcinomas more common than sarcomas? Describe your favourite new term or concept from this class in brief.
There has not been rain for many months. A biologist is driving down the highway and notices that a big number of corn fields have corn that is wilted and short.
In pea plants, allele for purple flowers (P) is dominant to the allele for white flowers (p). In a cross between the purple-flowered plant and the white-flowered plant, all 73 of the offspring plants had purple flowers. Which of the most likely descr..
Discuss and define bone marrow and the distinctions between red and yellow marrow. Please discuss circumstances under which yellow marrow might convert to red marrow.
In a cohort study that found an association between alcohol consumption and bladder cancer, 20,000 middle-aged men were asked about their drinking habits and then tracked for 5-years to watch for development of cancer.
Why is the frequency of the sickle-cell gene different in North America versus Africa. Now what is your definition of male and female? This is a 26-year-old female with congenital adrenal hyperplasia. What do you say.
What percent of all the enzyme molecules will have their Cys thiol in the active form at pH 8.6. Some mammals might run or fight when frightened. For both of these examples, illustrate the physiological mechanisms involved in the answer.
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