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Describe three ways in which enzyme activity levels in a cell can be regulated. Include at least one example inwhich the substrate itself is involved in regulation, and at leastone in which a non-substrate molecule is involved. For asubstrate/enzyme interaction, describe the induced fit model ofenzyme activity. For a non-substrate/enzyme interaction, describehow the enzyme itself is affected by that interaction. Finally,explain how negative feedback is often used to maintain metaboliccontrol of enzymatic pathways.
What does abiogenesis refer to and who finally settled the spontaneous debate?
Which of each pair of amino acid substitutions listed below would you expect to disrupt protein structure the most? And why? how do you go abouts knowing this?
You have a solution that is a mixture of two compounds, A and B. The molar extiniction coefficient of substance A at 260 nm and 280 nm is 5248 and 3150 respectively.
A sample has between 3.3 x 10^-4 and 3.3 x 10^-8 CFU/mL. Devise a complete but efficient (that is, no extra plates!) dilution scheme that will ensure getting a countable plate.
If a transferrin receptor has a cross-sectional area of 50 Angstroms X 100 angstroms (5x10nm), and how many receptors could be accomodated in a 100nm clathrin-coated vesicle assume that only 50% of surface area can be occupied by proteins.
Sometimes the gene for blue eye color is in the same gamete asthe gene for curly hair, but they are in different gametes just asoften. Why? Pepsin breaks the peptide bond associated witha) glutamate
q1. what were the main discoveries obtained by the planetary missions of the sun? illustrate the structures of the sun
Estimate the sequence of hexapeptide on the basis of the following data. When the sequence is not known, a comma separates the amino acids.
Do a search in the library, Internet, or in Proquest to find an article from a reputable source on a certain disease that is affected by nutrition.
If you compared a contracted sarcomere to a relaxed sarcomere, which of the following regions would NOT differ in width?
q.1. there is a general agreement that life should have evolved in the oceans originally and only much later invaded
A brilliant scientist has discovered a new anti-inflammatory agent, Xious, that is capable of preventing onset of, and therapeutically down-regulating the inflammatory response in many animal models of inflammatory autoimmunity.
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