please answer these part1 Qs and explain

[NYtimes]

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principle allosteric regulator of pyruvate metabolism in liver?

• ATP
• NAD
• citrate
• cAMP
• AcCoA

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intermediate in biosenthesis of cholestrol?

• cholic acid ----> answer key says this. is that correct?
• .......

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during oxidative phosphorylation, H+ gradient is created using energy from which?

• ADP transport
• ATP synthesis
• ATP hydrolysis
• reduction of NAD
• electron transfers

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in biosynthesis of purines, which is source of MOST nitrogen?

• urea
• ammonia
• uric acid
• pyrimidines
• amino acids

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which has hydroxyl group that participates in enzyme reaction?

• serin
• alanine
• gly
• pro
• arg

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which one is responsible for initiating cross bridge cycling in smooth muscle?

• myosin ATPase
• myosin kynase
• myosin reductase
• myosin phosphatase

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basic priciples for sequencing DNA by Sanger derive from ?

• translation
• transcription
• replication
• reverse transcription

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which is the most reliable criterion for pathogenicity of staph?

-hemolysis
-pigment production
-coagulase
-mannitol fermentation
-liquefaction of gelation
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each is necessary for viral antigen recognition by CD4 helper cells EXCEPT ?

-viral replication in host cell
-cleavage of viral proteins into small peptides
-transport of viral peptides to a cell surface by MHC Class ll
-binding of T cells TCR to a MHC class ll bound viral peptide
-internalization of virus progein by antigen presenting cell

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whats unique aspect of Strep. mutan?
-tendency to form chain
-secretion of proteolytic enzymes
-extracellular polysaccharide made from glucose
-formation of water insoluble glucans from sucrose

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regulation of each is associated with hypothalamus EXCEPT:
-growth
-ovulation
-body temprature
-respiratory
-carbohydrate metabolism

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if they give the fluoride concentration how can i measure its ppm?

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greatest blood to left coronary art. during ?

-eartly systole
-late syst
-early diast
-late diast

i think it must be late systol .right
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cortisol stimulates synthesis in the liver of?
-glucokinase
-PFK
-pyruvate carboxylase
-pyruvate kinase

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action potential initiated at midpoint along axon will:
propagate towards nerve ending
..........................soma
...........................both side
???im confused about this question.. b/c ive heard different answers with no explain? is anyone sure about the answer?
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new bone in ortho treatment?
-woven
-compact
-cementum
-endochondral
-intramemberanous

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atherosclerosis, hyperthrophy of :
-tunica media
-tunica intima
-tunica adventitia
-internal elastic memberane
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[BUSODM]

during oxidative phosphorylation, H+ gradient is created using energy from which?

• electron transfers

---------------------------------------------------------
in biosynthesis of purines, which is source of MOST nitrogen?

• amino acids

-----------------------------------------------------------------
whats unique aspect of Strep. mutan?

-formation of water insoluble glucans from sucrose

------------------------------------------------
which has hydroxyl group that participates in enzyme reaction?

• arg

correct me if i am wrong

 

[NYtimes]

during oxidative phosphorylation, H+ gradient is created using energy from which?

• electron transfers

---------------------------------------------------------
in biosynthesis of purines, which is source of MOST nitrogen?

• amino acids

-----------------------------------------------------------------
whats unique aspect of Strep. mutan?

-formation of water insoluble glucans from sucrose

------------------------------------------------
which has hydroxyl group that participates in enzyme reaction?

• arg

correct me if i am wrong

Thanks for your prompt reply. I don't have any idea about Arg participating enzyme reaction and a.a as a source of nitrogen. would you please write a concise explain.

 

[BUSODM]

in biosynthesis of purines, which is source of MOST nitrogen?

• amino acids .I trink aminoacids as aminoacids are the main source of nitrogen.correct me if i am wrong

which has hydroxyl group that participates in enzyme reaction?

• I am in between serine and argininge.serine is polar so participate in enzyme reaction but i am not sure whether or arginine is polar.

correct me if i am wrong[/quote]

 

[NYtimes]

in biosynthesis of purines, which is source of MOST nitrogen?

• amino acids .I trink aminoacids as aminoacids are the main source of nitrogen.correct me if i am wrong

which has hydroxyl group that participates in enzyme reaction?

• I am in between serine and argininge.serine is polar so participate in enzyme reaction but i am not sure whether or arginine is polar.

correct me if i am wrong

[/quote]


THANKS. I also added some more questions to that page, would you have a look at them and see if you know any of those?

regarding that enzyme reaction, I think arg is correct. look at this question:

which one firectly catalyzes urea formation in cell?

• urease
• uricase
• arginase
• glutaminase

i think the answer is Arginase.
arginine + H2O → ornithine + urea

I knew theres a relation between Arg and Urea😍

 

[BUSODM]

no doubt about it its arginase