1,716 Answered Questions for the topic biochemistry

Biochemistry Science Biology Act Science

06/18/20

Pressure of oxygen
If the partial pressure of oxygen is the same at the top of Mount Everest (elevation above sea level 8848m) as Toronto (elevation above sea level 76m), why is it so much harder (and dangerous) to... more
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Biochemistry

06/09/20

Gytis DNA molecule
Describe the structure of a DNA molecule, including how individual constituents bind to each other along a length of DNA, and how two DNA strands interact with each other.
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Biochemistry

06/09/20

Gytis Biochemistry
Discuss what happens to ATP in a cell that is active and performing energy requiring tasks, and then enters a resting phase where it no longer performing energy requiring tasks.
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Biochemistry

06/04/20

Gytis Enzymes
Enzymes are very specific for the reactions they can catalyse, explain why this is important.
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Biochemistry

06/03/20

Gytis Biochemistry
Give two reasons why you think hormones might be produced as pro-hormones. Write up to a paragraph on each.
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Biochemistry

05/31/20

Biochemistry...
. A molecule is described to you as an aliphatic, polar glycolipid. Which of the following statements must then be true for the molecule (select all that are correct); a) it is soluble... more
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Biochemistry Science English Business

05/30/20

Please solve it
Q.1. Consider the nutrients' concept below and use it to answer question1(a,b)Nutrient Access concept: it is believed that maximum crop growth can be achieved by constantsupply of soil nutrients... more
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Biochemistry Science Biology Chemistry

05/29/20

I need help Please
According to Model 3, wolves (gray and red) are more closely related to what other group—dogs or coyotes? Explain your answer.
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Biochemistry Science Biology Chemistry

05/27/20

i need help please

Identify one organism (plant or animal) in which artificial selection is used, and describe how that selection process occurs. 
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Biochemistry Science Biology Chemistry

05/27/20

i need help please
do you think that organisms/species will become more different from each other over time? Or more similar? Explain your reasoning. 
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05/20/20

Strontium (average atomic mass = 87.62) naturally exists as 4 stable isotopes with masses of 84, 86, 87, and 88. Which statement is correct?
Strontium-88 is the most abundant.Strontium-87 is the most abundant.All strontium isotopes are equally abundant.Strontium-86 is the most abundant.
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05/20/20

A bottle of Bourbon Whiskey contains 250.ml of liquid and 42% alcohol (C2H5OH). assuming density = 1.05g/ml, will the whiskey freeze if put into a -20.0 degree celsius freezer?

can someone please explain.
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05/20/20

A 0.152mol sample of CH2O2 reacted completely according to the reaction shown and 38.7 kJ of heat was released. What is delta H for this reaction?
2CH2O2+O2---->2CO2+2H2Ocan someone please explain.
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05/19/20

What is the concentration of bromide ion if 25.0 ml of a 0.50 M AlBr3 solution combines with 40.0 ml of a 0.35 M NaBr solution?
I converted AlBr3 and NaBr to moles however, I'm not so sure what to do after that. I know the final answer for the concentration of bromide ion is 0.79 mol/L. Can someone please help ?AlBr3 =... more
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05/19/20

Can someone please tell me if there is an easier way to answer this question? and if I did it correctly please.

A 2.32g sample of Na2SO4*nH2 yields 1.42g Na2SO4 upon heating. What is the value of n?Na2SO4*nH20--->Na2SO4(s)+nH20(g)Molar Mass Na2SO4 =142 g/molMolar Mass H2O = 18.016 g/molI'm not sure if I... more
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05/19/20

Tetrahydrocannabinol (thc), the active agent in marijuana, is composed of 80.16% carbon, 9.63% hydrogen and 10.17% oxygen by mass. What is the empirical formula of thc?
The answer I got was C7H10O, however I think I am missing a step since my answer was incorrect. This is what I did 80.16g C (1mol/12.01g)C =7 mol C 9.63g H (1mol/1.008g)H =10mol H 10.17g O... more
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05/19/20

A sample of ethanol (C2H6O) contains 3.024g of hydrogen. How many moles of carbon are in the sample ? Molar Mass of ethanol (C2H6O)=46.07g/mol
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Biochemistry

05/18/20

Aldolase B Expression
How can Aldolase B expression be regulated by transcription factors HNF-1, HNF-3, C/EPB and DBP?
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Biochemistry Biology Microbiology

05/13/20

What are the mechanisms of antibiotic resistance used by Pseudomonas aeruginosa and Burkholderia cepacia complex?
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Biochemistry

05/12/20

I have an enzyme that the enzyme-inhibitor complex requires 450 kJ.mol-1 to dissociate and that it displays kinetics somehow similar to non-competitive inhibition. are is a good inhibitor?
Human xanthine oxidase catalyzes the oxidation of hypoxanthine to xanthine and can further catalyze the oxidation of xanthine to uric acid. For the treatment of hyperuricemia and gout, several... more
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Biochemistry

05/10/20

biochemistry questions

20. Which of the following mechanisms of allosteric enzymes activation is correct? a They induce the denaturation of an apoenzyme b They block the enzyme active centre c They change the... more
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05/09/20

Why do we sweat order to cool off?
Drops of water and ethanol are placed on an overhead projector and the ethanol drop is seen to evaporate more rapidly. Our bodies utilize sweating as a means to stay cool and maintain... more
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Biochemistry

05/09/20

Using molarity to find solute mass and solution volume
Calculate the volume in liters of a 0.00599 mM calcium sulfate solution that contains 25.0g of calcium sulfate . Be sure your answer has the correct number of significant digits
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Biochemistry Science Biology

05/07/20

Calculate the number of ATPs generated by completely oxidizing one molecule of tripalmitoylglycerol into CO2 and H2O in muscle tissues.
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05/06/20

For chromium, Cr, the heat of fusion at its normal melting point of 1860 °C is 14.6 kJ/mol.
For chromium, Cr, the heat of fusion at its normal melting point of 1860 °C is 14.6 kJ/mol.The entropy change when 1.61 moles of solid Cr melts at  1860 °C, 1 atm is _____ JK-1.
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