Which of the following is the result of the hydrolysis of 5'-CTAGTTC-3' at the b side? (А) рСр, 3 рт, рА, pG, рс-он в) рСр, 3 Тр, Ар, Gp, С-ОН с) 2 рс, 3 рт, рА, pG D) 2pCp, 3 рТ, РА, pG, рC-он
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- Question 26 The removal of a phosphate from cytidine yields the cytosine base. A) True B FalseQuestion 32 All of the following are true regarding fimbriae, pili, and flagella, EXCEPT A) O Fimbriae and pili are generally used for attachment. B) O Specialized pili are used for DNA transfer between bacterial cells. C) O Bacterial chemotaxis occurs by the changing frequency of runs to tumbles D) OFlagellar motion in a bacterium occurs in a rotary fashion, unlike a eukaryotic flagellum. EO The pili of some bacterial species can be used for either a gliding or twitching type of motility There are no exceptions, A-E are all true. eneration time?Question 14 a) Radioactive decay produces ionising radiation. Like all ionising radiation this can lead to harmful effects on living tissue due to cell damage including damage to DNA, mutation and cell death. Contrast the differing health risks associated when working with alpha, beta or gamma radiation sources. b) Describe some ways in which those working with radioactive sources and people in general can be protected against the risks of radiation exposure from such sources.
- QUESTION 43 Which of the following areas is part of the exchange surface? -F D E- B A O Label C O Label D O Label E O Label AQuestion 1: Why do we need to add concentrated H2SO4 (sulfuric acid) or HCl (hydrochloric acid) during Molisch's Test? Question 2: Why do trioses and tetroses give negative result for the Molisch's Test? Explain with the help of necessary chemical structures or minimal reaction blocks. Question 3: Why do some organic acids like citric acids, lactic acid, etc. give positive result for Molisch's Test? Question 4: Is Molisch's Test a specific test for detecting Carbohydrates? Discuss in brief with other possible test for the detection of carbohydrates. Question 5: Suppose, you are provided with samples of commercially available sugar-free carbonated soft drinks. How would you perform the Molisch's Test to verify?Question 7 Please click here to access the Unit 6 lab experiment video. Please consider the B1 extractions with 1 M aqueous sulfuric acid, which is described in the Unit 6 lab instructions document - Under the acidic extraction conditions with aqueous sulfuric acid, benzaic acid will be found predominantly in what form and in which phase (ether or aqueous)? Benzoic acid is in its protonated form and can predominantly be found in the upper ether phase. O Benzoic acid is in its protonated form and can predominantly be found in the lower aquecus phase. O Benzoic acid is in its deprotonated form las socium benzoate salt) and can predaminantly be found in the upper ether phase. O Benzoic acid is in its deprotonated form (as sodium benzoate salt) and can predominantly be found in the lower aquenus phase.
- Question 11 This structure is also known as thymidylic acid. NH OH HO-P=0 OH A) True B) FalseQuestion 1. Enzymes, proteins and deoxyribonucleic acid (DNA) are important biological macromolecules. Enzymes are not only speed up the reaction, but also are necessary for DNA reproduction. e) Michaelis - Menten Kinetics model explains how reaction rates are depending on the concentration of enzyme and substrate. i. What is meant by the saturation of enzyme? ii. A decrement in enzyme activity is known as enzyme inhibition. Based on normal enzyme activity, explain the enzyme kinetics for competitive inhibition and noncompetitive inhibition, as shown in Figure 1. Normal enzyme Competitive inhibitor Noncompetitive inhibitor Substrate concentration Figure 1: Enzyme inhibition f) What is the importance of cofactor in the enzyme activity? Give an example of a disease that is related with cofactors. Rate of reactionQuestion 1. Enzymes, proteins and deoxyribonucleic acid (DNA) are important biological macromolecules. Enzymes are not only speed up the reaction, but also are necessary for DNA reproduction. c) Describe an example of biomedical application that utilizes a protein folding technique. d) Describe the effect of pH on the oxygen binding affinity of hemoglobin.
- QUESTION 26 Which of these reagents is commonly used to determine the number of polypeptides in a protein? dansyl chloride 2-mercaptoethanol (B-ME) DEAE cyanogen bromide iodoacetate O O O OQuestion 12 There are four elements that make up all amino acids. Two of these are carbon and hydrogen. The other two are: a) sulfur and oxygen Ob) phosphorus and oxygen Oc) sulfur and nitrogen d) phosphorus and nitrogen O e) nitrogen and oxygenQuestion 22 Correct statement regarding nucleotide structure (A) removal of the ribose-phosphate group from thymidylic acid yields thymidine B removal of the phosphate group from guanylic acid yields guanine removal of the phosphate group from adenylic acid yields adenosine D removal of the ribose-phosphate group from uridine yields uracil