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1) Occasionally a person is found to have one blue eye and one brown eye. This is caused by the creation of a new mutation. In which cell did the mutation occur?a) somatic cell of that personb) germ cell of that personc) germ cell of that person's parentd) somatic cell of that person's parent2) Consider the following list.. How many are proteins that can negatively regulate expression of a target gene?Gal80 AraC lacZ TrpRLacO CAP Gal4 Gal7a) 1b) 2c) 3d) 4e) 53) Which statement is true about DNA methylation in eukaryotes?a) it is used to regulate DNA replicationb) it is used to regulate protein translationc) it is used to regulate mutation repaird) it is used to regulate heterochromatin spreadinge) it is used to regulate transcription4) Which statement is true about DNA methylation in prokaryotes?a) it is used to regulate DNA replicationb) it is used to regulate heterochromatin spreadingc) it is used to regulate mutation repaird) it is used to regulate transcriptione) it is used to regulate protein translation5) Nondisjunction of chromosomes in meiosis may take place at the first or the second meioticdivision.If nondisjunction of the XY pair of chromosomes took place at the first division in theformation of sperm,which of the following chromosomal types of sperm could be formed?a) XYb) YYc) Yd) XXe) X6) Which is a true difference between miRNA and siRNAs?a) miRNAs are processed by Dicer, siRNA are usually notb) miRNAs are found in the RISC complex, siRNAs are usually notc) siRNAs are found in the RISC complex, miRNAs are usually notd) siRNAs are processed by Dicer, miRNAs are usually note) miRNAs are transcribed from the genome, siRNAs are usually not7) Consider two transposons in yeast, Ty3 and TyZ. The DNA sequence for each contains a singlegene interrupted by an intron. The Ty elements are allowed to transpose to new locations in theyeast genome. When their DNA sequence is determined in the new location, Ty3 has no intron,and TyZ has an intron. Is either of these Ty elements a retrotransposon?a) neither Ty3 nor TyZ is a retrotransposonb) both Ty3 and TyZ are retrotransposonsc) TyZ is a retrotransposond) Ty3 is a retrotransposone) there is not enough information to tell8) What effect would a mutation in the gene encoding CAP have on expression of the lac and araoperons in E. coli?a) expression of ara would decrease; xpression of lac would be unaffctedb) expression of lac would decrease; expression of ara would be unaffectedc) they could no longer be repressed and would be constituively expressedd) they could no longer be strongly activated in the presence of inducere) they could no longer be strongly activated in the absence of inducer9)Nonhomologous chromosomes that have exchanged segments are the products of aa) pericentric inversionb) reciprocal translocationc) paracentric inversiond) double deletione) transposon insertion10) Ethyl methane sulfonate (EMS) is an alkylating agent. The mechanism of action of this type ofmutagen isa) slipping between the bases of the DNAb) cleaving the base off a nucleotidec) breaking the sugar-phosphate backboned) adding a chemical group to DNA basese) removing a chemical group from the DNA bases11) If the two Trp codons in the leader of the trp operon were changed to codons for His, what wouldbe the consequence for regulation of the trp operon?a) the trp operon would now be constitutively expressedb) expression of the trp operon would now be under transcriptional control bythe His Repressor proteinc) expression of the trp operon would show attenuation when levels ofhistidine in the cell were lowd) two of the abovee) all of the above12) Which prokaryotic transcription factor does the yeast factor GAL4 most resemble in its mode ofaction of regulating gene expressing?a) Lac Repressorb) AraCc) Rhod) CAPe) Trp Repressor
Applications of Different Observational Study Designs' indicating for every objective under pertinent study design.
Using the data given in table below draw a Lineweaver-Burk plot.
What component of root-tip cells is stained by Safranin in the permanent mount of a longitudinal section of a corn root tip? What component of root-tip cells does Fast Green stain? What could different stains such as these indicate with respect to ce..
Describe how Dendritic cells and T regulatory cells affect immune tolerance. And what woulld happen if there is too much immuno tolerance ?
Dozens of potato varieties exist, differing from each other in potato-tuber size, skin colour, flesh colour, and shape. One might construct a classification of potatoes based on these morphological traits. Which of these criticisms of such a classifi..
Protein classification schemes
Assume you are working to characterize a novel protein in mice. Analysis shows that high levels of the primary RNA transcript that codes for the protein are found in tissue from the brain.
Earlier in 2010, the Pacific island nation of Samoa decided to switch from driving on the right to driving on the left. Why may these cause difficulties? Why is it complicated for a cell to change codon usage, say, switching a "stop" codon to a trypt..
Assume you are vegetarian, and you wish to make the case to your non-vegetarian but environmentally conscious friend that eating vegetarian is more environmentally friendly.
Explain why does depletion of Ca2+ from the medium through chelating agents promote isolation of cells from epithelial tissues during primary cell culture?
An organism is discovered that consumes a considerable amount of sugar, yet does not gain much weight when denied air. Curiously, the consumption of sugar increases as air is removed from the organism's environment, but the organism seems to thrive e..
The given statements describe SDS-PAGE, a method used to separate proteins. Some of the statements are correct, and some of them are incorrect.
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