1,698 Answered Questions for the topic biochemistry

10/09/21

What are the products? C + O2 → CO2
a. C and CO2b. O2 only c. CO2d. C only
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10/06/21

What is the net charge of the tripeptide at pH 11.5?
Consider the following pKa values for glycine, arginine, and lysine. What is the approximate net charge of the tripeptide Gly-Arg-Lys at pH 11.5?Free amino acid pKa of alpha-carboxyl group ... more
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10/06/21

What is the net charge of the tripeptide at pH 11.5?
Consider the following pKa values for glycine, arginine, and lysine. What is the approximate net charge of the tripeptide Gly-Arg-Lys at pH 11.5?Free amino acid pKa of alpha-carboxyl group ... more
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Biochemistry Organic Chemistry

10/05/21

Finding specific heat of metal

A metal object with a mass of 119.25 g is heated to 97.5 degrees * C and then transferred to a calorimeter containing 84.58 g of water at 20.5 °C. If the water and metal reach a final (equilibrium)... more
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10/04/21

I really need help with this question please and thank you!
When 1.00-gram sample of baking soda is heated, a gas is formed. The solid that remains weighs less than 1.00 g and does not have the same properties as the original sample. Is the baking soda an... more
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10/04/21

what represents the proper order to fill electron orbitals from 1s to 4p.
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Biochemistry

10/04/21

How many lone pairs have asparagine
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10/04/21

help me understand calculation

I don´t understand how i will get the procentage I would love to get it described very basic from start so I can start understand the rest of our questions please. Calculate the mass of acetic... more
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10/04/21

Help me understand how i calculate the percentage of mass
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10/04/21

Calculate the amount needed for a certain concentraintion- please explain detailed so I understand

Calculate the amount of β-mercaptoethanol needed in a 15 ml extraction buffer to obtain a concentration of 10 mM. β-mercaptoethanol is available as a 98% (W/W) solution. Assume a molecular weight... more
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10/04/21

Classify as mixture or pure substance
Classify as mixture or pure substanceA. Gasoline B. Oxygen gas C. Milk D. Mercury (Hg) used in a thermometer E. A tablespoon of sugar (C12H22O11)
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10/04/21

Identify the change as Physical or Chemical
Identify the change as Physical or ChemicalA. Mothballs vaporize in a closet B. A flashlight corrodes on storage.C. A piece of rubber stretches when pulled.D. Alcohol feels cool when it evaporates... more
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Biochemistry

10/04/21

Bradford Assay Lab
Milk diluted 1:50 gives a reading of 0.224 absorbance units, which gives a concentration M mg/mL. The final concentration of milk is M x 50 = ? mg/mL.
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10/01/21

Acid Base question
 An acetate buffer was prepared by dissolving 0.1 mol of acetic acid and 0.11 mol of sodium acetate in 1L of water. Suppose 25 mL of 0.1 M HCl is added to 100 mL of acetate buffer. What are pH... more
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Biochemistry Biology Psychology

09/30/21

please use the chart blew and explain each question
trail volunteer 1 mm volunteer 2 mm1 6 102 2 103 5 ... more
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09/21/21

Why does the second and third oxygen bind easier to hemoglobin?
Hi!I wonder why the second and third oxygen binds easier to hemoglobin whereas the first and fourth don't bind as easily?
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Biochemistry

09/18/21

Need help with these questions please

Calculate the [OH-] and the pH of a solution with [H+]=3.3 x 10^-9 M at 25 C calculate the [H+] and the pOH of a solution with [OH-]=1.7 x 10^-12 M at 25 C calculate the [H+] and [OH-] of a... more
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Biochemistry Biology Chemistry Gre

09/18/21

Which ethical rule(s) or document(s) were responsible for required elements to the ICF?

Required elements of the ICF are a direct result of the various ethical rules and documents that have been established by the US government. Which ethical rule(s) or document(s) were responsible... more
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09/18/21

Adding a statement that the clinical trial is Research was a direct result of the Declaration of Helsinki. Group of answer choices True False
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09/18/21

Adding the funding source required element was the direct result of the Declaration of Helsinki. Group of answer choices True False
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Biochemistry

09/14/21

Give the systematic name for the following cycloalkane.
Give the systematic name for the following cycloalkane.
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09/12/21

Recall Planck's constant equals
Recall Planck's constant equals 6.63 × 10−34 J·s and the speed of light is 3.00 × 108 m/s. Calculate the wavelength (in nm) of a photon emitted by a hydrogen atom when its electron drops from... more
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09/12/21

Consider the following energy levels of a hypothetical atom:
Consider the following energy levels of a hypothetical atom:E4 −1.51 × 10−19 JE3 −7.11 × 10−19 JE2 −1.25 × 10−18 JE1 −1.75 × 10−18 J(a) What is the wavelength of the photon needed to excite an... more
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09/12/21

What is the wavelength?
(a) What is the wavelength (in nm) of radiation that has an energy content of 8.01 × 103 kJ/mol?(b) In which region of the electromagnetic spectrum is this radiation found?
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09/12/21

What is the frequency?
What is the frequency (in reciprocal seconds) of electromagnetic radiation with a wavelength of 1.39 cm?Enter answer in scientific notation____ x 10----s^-1
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