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Zinc, an essential trace element, may be found bound to the active site of some enzymes. What would be the most likely function of such zinc ions?
a. coenzyme derived from a vitamin
b. a cofactor necessary for catalysis
c. a substrate of the enzyme
d. a competitive inhibitor of the enzyme
e. an allosteric activator of the enzyme
Review the DNA of the Phenylalanine hydroxylase (PAH) gene in a patient with phenylketonuria revealed a mutation in the protein coding region whose forecasted effect would be to replace the amino acid aspartic acid.
Determine chromosomal condition results in an organism being only half as fertile as a wild type individual of the same species?
Martha is maintaining her current weight by eating 2,500 kcalories per day. To lose 1 pound of fat per week, she would have to decrease her intake to how several kcalories per day. Considering the albedo of various surfaces how might temperatures var..
Consider a culture into which two E. coli strains are inoculated. Strain A is normal with g=21 min at 37 degrees C, and 42 mins at 27 degrees C. Strain B has a temperature-sensitive mutation, such that g=55 mins at 37 degrees C,
Identify the the solute and solution in a hot chocolate solution that is made of chocolate syrup and warm milk.
You have identified a strain of mutant E. coli that constitutively expresses from the lac operon. Considering that this is a mutation in a gene that encodes for a protein repressor.
Assume you count the number of bacteria in 5 of the 1/400mm^2 small boxes of the central grid on the Hemocytometer.
Myasthenia gravis is an autoimmune disease affecting the neuromuscular junction. In myasthenia gravis, weakness occurs when the nerve impulse to initiate or sustain movement does not adequately reach the muscle cells.
Consider the following two genotypes: AABB, aabb where A and B are dominant and a and b are recessive.
What is a step of rho dependent termination?
There are two documents for lab procedures. You should start with "Rat CV Part 1", and then move on to "Soda Lime and Rebreathing".
MacConkey Agar gives two results: growth and color change. What does each of the two results tell you about the characteristics and/or biochemical abilities of the organism being tested?
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