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Explain how an enzyme catalyzes a reaction. what are the three main steps of the cycle of enzyme-substrate interactions.
How is enzyme activity regulated by the cell?
Consider that, in the hypothetical study given in the table below, cases underestimated their exposure and, as a result, 20% of exposed cases were falsely classified as unexposed.
Consider the meaning of the term "ecology." How do the ideas of energy and chemical cycles, community structure, biodiversity and succession fit together to form the basis of the way the natural world works?
Codons with U or C as the second nucleotide, for example, tend to specify hydrophobic amino acids. Can you recommend a possible explanation for this phenomenon in terms of the early evolution of the protein synthesis machinery?
In moist temperate environments like New England, most plants are C3 plants. Describe what would happen to plant growth during a long summer drought in Central Massachusetts.
Distinguish between a hereditary germline cancer, such as those caused by BRCA1 mutations, and cancers that result from two somatic mutations in the same gene in the same cell.
Consider the tetrahybrid cross between AaBbCCDD and AaBbCcDd. Assume that it is a dominant/recessive system and all genes are unlinked. What proportions of the offspring will have the recessive Phenotype for all four characteristics?
A generalized transducing phage first infects a bacterial donor of genotype his +, trp +, and rif +. After lysis of the bacterial donor, a bacterial recipient of genotype
What do mean by RFLPs, VNTRs, and SNPs.
Assume you have 10ml of a concentrated solution of dye and you want to prepare a 1/3, 1/9, and 1/27 dilution so that you have at least 5 ml of each solution to work with when you are all done.
Explain the steps by which DNA sequencing is performed. Using at least one example, of how DNA sequencing has become a valuable tool in forensic medicine and/or biological research.
define the relationship between chromatin packaging and transcription rates. Name two different types of chromatin modification associated with changes in gene expression.
At a talk by a visiting scientist, you learn about a strain of bakers' yeast that contains a mutation called gal1- in its galactokinase gene. Because this gene is needed to metabolize galactose, the mutant strain cannot grow in galactose medium.
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