The “one gene–one enzyme” hypothesis of George Beadle and Edward Tatum was an oversimplification because:
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A. mutations may not completely inactivate an enzyme. |
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B. some enzymes contain more than one polypeptide. |
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C. some enzymes can be phosphorylated. |
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D. auxotrophs can be corrected. |
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E. some RNAs are independently catalytic. |
2. Describe the 5 events that convert an mRNA into a cDNA.
In: Biology
Renin is an aspartyl protease that has a role in the regulation of blood pressure. The active site has two aspartyl residues, one acting as an acid (pK1 5.0) and the other acting as a base (pK2 of 4.0). If the enzyme activity is measured at pH 6.0, what fraction of the enzyme is expected to be ACTIVE
A. 1% B. 9.0% C. 50% D. 90% E. 95% F. 99%
In: Chemistry
In: Biology
What is CYP450 metabolic system? What did you learn about metabolism of drugs and how that impacts you as a nurse in your work and providing the best care possible? You need to also discuss and give examples of what and how a hepatic inducer enzyme (2 examples) and hepatic inhibitor enzyme (2 examples) act in the body and the effects that will likely result.
In: Nursing
Glutamate synthetase is central to nitrate assimilation. You, as a grad student, are curious about how other nutrients might regulate this enzyme; and specifically, you would like to study how the gene encoding this enzyme is regulated by the presences of phosphate in the environment. Describe the design of your experiment(s) that will look at the regulation of the glutamate synthetase gene by phosphate. Remember to include controls in your description.
In: Biology
In: Chemistry
Propose a 20 amino acid sequence for an amphipathic beta-hairpin strand.
In: Biology
In: Biology
What is translation and what region of a cell does it occur in a cell?
What non-membrane bound structure in a cell is involved in the process of translation, where are the two places they can be found in a eukaryote?
How many nucleotides on mRNA code for one amino acid, and what is the name of the unit on mRNA that codes for that one amino acid?
What is an anticodon and where do you find it?
What is the role of tRNA in the process of translation?
In: Biology
During the calvin cycle, the molecule that reacts with co2 to produce two molecules of 3PG is ?
a)glucose b)NADPH c)ribulose bisphosphate d)carotene e)pyruvate
Name three different lipid molecules and briefly state each one's biological function?
Name three pairs of bones that articulate with each other?
Draw structure of generic amino acid & represent major parts of an amino acid and how they are linked together
In: Biology