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- Which of the following enzyme:function pairs is/are correct? a.primase:forms RNA primer b.ligase:join Okazaki fragments c.gyrase:relax supercoils d.DNA POI ll:removes RNA primersWhich of the following is NOT a REDOX reaction? 2Al(s) + 3CuSO4(aq) → Al2(SO4)3(aq) + 3Cu(s) Cl2(aq) + 2KBr(aq) → Br2(aq) + 2KCl(aq) AgNO3(aq) + KCl(aq) → AgCl(s) + KNO3(aq) Sn(s) + 2HCl(aq) → SnCl2(aq) + H2(g)One pair of students had plates with lots of blue colonies but no white colonies. Most likely, one component (not guide RNA) was omitted when the reaction was set up. The final volume of the student’s reaction was in the 20-25 µl range. Which component was omitted? There is more than one correct answer. List one and explain your answer.
- The step in the mechanism of the free radical reaction with the lowest activation energy is the...A. initiationB. terminationC. propagationD. intermediatesE. inhibitionA researcher creates random copolymers of three nucleotides each by mixing polynucleotide phosphorylase with guanine and adenine nucleotides in a ratio of 5 guanine nucleotides to 1 adenine. Give the different copolymers produced and their theoretical proportions.The formation of deoxyribonucleotide from ribonucleotide requires all the following except: a.Nucleoside diphosphate (NDP) b. Nucleoside triphosphate (NTP) c.Thioredoxin d. Ribonucleotide reductase
- End products of biochemical reactions are often acids or alkalies.a. How are these products typically detected in a culture medium?b. Name two tests for reactions that produce acid end products.c. Name two tests for reactions that produce alkaline end products.In the Avery experiment, mice were killed if they injected with S strain cells. Furthermore, incubation with extract from dead S strain cells could transform non pathogenic cells into pathogenic cells. This effect of S strain extract was eliminated if S strain extract is treated with what enzyme before incubation with non-pathogenic cells? protease DNAse RNAse LipasePlase put explaination too. Thanks! Pounding is a usual technique used in sample preparation. What is the chemical basis why pounding is used in simplete prepation? a. Pounding allows molecules to be prepared for reaction b. Pounding breaks the intermolecular forces within molecules c. Pounding increases surface area leading to faster reaction d. Pounding allows samples to fit in test tube
- A student purified a protein, resulting in a fraction with a volume of 240 µL. The sample has a corrected A280 of 0.234, and the blank corrected A280 was 0.069. (Both values were measured with a path length of 1.00 cm.) The student then added 6.00 µL of the sample to a reaction tube. Calculate the mass of protein in the reaction (in µg).using cysteine, serine, and aspartic acid create a tripeptide by performing 2 dehydration synthesis reactionsWhich of the following techniques takes advantage of NET CHARGE to purify/characterize proteins? a. Isoelectric focusing b. Hydrophobic chromatography c. Affinity chromatography d. DialysisExplain.