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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.
he clinical laboratory returns the following arterial blood values for patient: pH = 7.2; plasma HCO3- = 29 mmol/L; plasma pCO2 = 75 mmHg. Determine the patient's acid-base disorder?
Among African Americans, how common is sickle celldisease? How common are carriers of the sickle cell allele inthis same ethnic group? What are the symptoms of a sickle cell crisis? What treatments exist for sickle cell disease?
Glycogen is used as a storage material in muscle as well as in liver, but the fate of the glucose 1-phosphate that is generated is different. What happens in each of these tissues and why? Show the pathway for each.
The ion gradients maintained across the plasma membranes of most cells play a significant role in cellular energetics. Ion gradients are often either generated by the hydrolysis of ATP or used to make ATP by the phosphorylation of ADP.
q1. the trend in the u.s. is having children later in life than previous generations. what effects may this trend have
Your sympathetic nervous system works in your "fight or flight" response. your parasympathetic nervous system works in our relaxation response. which do you suppose would cause your pulse to race ? why?
Give thoughtful, researched answers to the following items. Points will be earned for completeness and accuracy. Provide sources in an appropriate citation format.
Determine what would you expect when a subject ingests the hypo-osmotic, iso-osmotic, and hyper-osmotic solutions?
(a) Why do spermatogonial cells retain their pluripotency in adults? (b) Describe one feature that enables the use of these cells in stem cell research and therapy.
A new radioactive element is discovered called Obama45. This element decays into Nohea43 (a rare element called Nohealthcareandatleastfivemoreyearsinafghanistan) with a half life of 10 years.
how will increasing the number of yeast cells affect the rate of ATP production by the cell (in moles ATP/hr) if the sugar concentration in the experiment is held constant?
A heterozygous, but phenotypically wild-type fruit fly (gray body color and normal wings) was mated to a black fly with vestigial wings. The offspring had the following phenotypic distribution: wild type, 720; black-vestigial, 780; black-normal, 280;..
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