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Q1. Assume that an enzyme requires an active site Cys thiol group to be in the unprotonated form (thiolate anion, R-S-) to act as a nucleophile in its chemical mechanism. If the pKa of that specific thiol is 8.3, what percent of all the enzyme molecules will have their Cys thiol in the active form at pH 8.6?
Q2. Survival depends on the capability of an organism to respond to changes in its environment. Some plants flower in response to changes in day length. Some mammals might run or fight when frightened. For both of these examples, illustrate the physiological mechanisms involved in the answer.
How does the mechanism by which a steroid hormone is detected differ from the mchanism by which a peptide hormone is detected?
What would you need to add to see an increase in the reaction rate with 8.0 g. of substrate?
1 cell proliferation and cell growth depend on extracellular signal molecules called growth factors and mitogens. what
Describe the multiple levels of cdk regulation and the significance of regulated cdks in the regulation of the cell cycle.
How to solve the complicated questions of pedigree . How to identify wheather it is dominant or reccessive its genotype
Attention deficit disorder is a syndrome in which a person has difficulty focusing sustained attention on a task for a significant amount of time.
A microbiologist transfers and inoculum from a slantlabeled Staphylococcus aureus on to a Petri plate. Following in cubation, both Staphylococcus aureus and Escherichia coli aredetermined to be growing in this culture. What is the most likely expl..
A true breeding black goose from Nova Scotia is crossed with true-breeding black goose from Japan, manufacturing F1 offspring that are all gray.
A 100 ml culture bottle is filled with LB (Lysogeny broth) which has all the nutrients and plenty of oxygen to support of oxygen to support E. coli growth. By performing serial dilutions and plate count you estimated that there are 5x10^5 cells pe..
Think about the trp operon. For each condition below, indicate whether the cell will synthesize the enzymes coded by trpE, trpD, trpC, trpB, and trpA and be able to synthesize trypophan.
PCR is touted as a highly specific process to amplify specific fragments of DNA. How can such a technique be adapted to identify a blood smear as belonging to a specific individual and also distinguishing between a brother and a sister who are twi..
What are satellite colonies? Why can satellite colonies be formed? If you use an antibiotics such as tetracycline, will you even get satellite colonies and why?
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