1,698 Answered Questions for the topic biochemistry

Biochemistry Math Biology Chemistry

11/26/23

Physics 2 Homework Question
Consider an electron near the Earth’s equator. In which direction does it tend to deflect if its velocity is (a) directed downward? (b) directed northward? (c) directed southeastward?
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Biochemistry Math Science Biology

11/15/23

Resistor and Capacitor Arrangements
Three capacitors are connected as shown in the figure. What is the equivalent capacitance between points A and B? Please explain the steps leading to your answer.If you were to swap all capacitors... more
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Biochemistry

11/14/23

How many grams of oxygen gas are needed to react with 19.0 mL of acetone?
 Acetone has a density of 0.786 g/mLg/mL.
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Biochemistry

11/13/23

4. While preparing a solution you accidently add more water, increasing the volume of a 0.500 M copper sulfate solution from 100 mL to 150 mL. What is the new concentration of the solution?

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Biochemistry

11/13/23

3. Given that you have only 20 mL of a 0.300 M potassium hydroxide solution, what is the maximum volume of a 0.0750 M solution you can prepare using the entire stock solution?
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Biochemistry Chemistry

11/09/23

biochemical calculation
The measured volumes of hydrogen (4 dm3) and chlorine (3 dm3) were mixed together, then the reaction was started. Calculate the volume of the gases after the reaction.
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Biochemistry Chemistry

11/09/23

biochemical calculation please help me
Find the molar ratio at which N2O and N2O3 were mixed, if we know that 11 dm3 of this mixture reacts with 27 dm3 of hydrogen, and that nitrogen and water are the only products of this reaction.... more
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Biochemistry Chemistry

11/08/23

basic biochemical calculation
What is the maximal volume of CO2 (at normal conditions) which can be produced if the following reagents are available? a) 1.00 kg of 5.0% hydrochloric acid and 200 g of limestone containing 90% of... more
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Biochemistry Chemistry

11/08/23

biochemical calculations
We have the solution of calcium chloride. The sodium carbonate was added to this solution, which resulted in precipitation of calcium carbonate. this precipitate was then calcinated, and at the end... more
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Biochemistry Science Biology Physiology

11/05/23

With evolution, how did ectotherms evolve into endotherms?
Like how did they completely change like eg (this is a bad example) a fish to a rat? I understand that there are multiple stages between each animal but how does that work? And also this second... more
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Biochemistry Chemistry

10/29/23

buffer solution preparing
Prepare:100 mL of 0.15 M sodium acetate buffer, pH 4.6 + 0.9 w/v%. NaCl (you have 0.25 M sodium acetate buffer, pH 4.6 & 9% w/v NaCl solutions.)
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Biochemistry Calculus Chemistry

10/26/23

chemistry basic calculation
there is about 50.109 of gold atoms in one drop of a sea water. how many grams of gold can be obtained from 1 tonne of sea water, if we know that the mass of 1 drop is 33 mg.
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Biochemistry Chemistry

10/26/23

chemistry calculation basic
how many moles and how many molecules of lipids is included in one bacteria cell which mass is 2.10-11 gram? We assume that such a cell contains 2% of lipids and that the average molar mass of... more
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Biochemistry Chemistry

10/25/23

chemistry, mass calculation
the radioactive isotope ^60Co can be detected at amount of 10^(-11) g. Calculate the approximate number of cobalt atoms in this mass.
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Biochemistry Chemistry

10/25/23

chemical calculation

a density of gold is 19.3 g/cm cube. How many atoms and how many moles of atoms does the volume equal to 1 mm cube of this metal contain?
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Biochemistry

10/21/23

Calculate the solubility at 25°C of CuBr in pure water and in 0.30M NaCN . You'll probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits.
Calculate the solubility at 25°C of CuBr in pure water and in 0.30M NaCN . You'll probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits.
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Biochemistry

10/21/23

BIOCHEMISTRY-DILUTE LDH?
In biochemistry lab, why do you have to dilute the LDH before adding to the assay? (we used E.Coli, and imidazole in lab, I don't know if that is important)
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Biochemistry

10/20/23

I have a report due tomorrow and I am lost:( please help!
How do you estimate the %B responsible for eluting LDH from the column?
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Biochemistry

10/20/23

Chromatograms-having trouble on my lab report, please help:)
How do you identify the peak fraction for flowthrough (FT) on a chromatogram and identify elution peaks seen in the chromatogram. How do you identify the LDH peak and how do you know it is the LDH... more
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10/12/23

What's the difference between ester and glycosidic bonds in organic chemistry, and how can I remember the differences between them?
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Biochemistry Chemistry

10/06/23

Turnover Number Calculation! New topic to me! Very lost!
You do an enzyme kinetic experiment and calculate a Vmax of 145 μmol per minute. If each assay used 0.20 mL of an enzyme solution that had a concentration of 0.20 mg/mL, what would be the turnover... more
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Biochemistry Chemistry

10/06/23

Km and Vmax and Turnover calculations! Very confused please help!
For an enzymatically catalyzed reaction in which the measured values for KM and Vmax are, respectively, 15.1 mM and 0.715 mM min-1, what is the value of the turnover number? The concentration of... more
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Biochemistry Chemistry

10/06/23

BIOCHEMISTRY-Reaction Velocity Question
For an enzyme that obeys Michaelis-Menten kinetics, what is the reaction velocity, V, observed at the following substrate concentrations?Express the result as a percentage of Vmax.(a) If [S] = KM,... more
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09/27/23

What has a bigger nucleus a simple squamous epithelium or a stratified squamous epithelium? And why? What are the nucleus sizes of both simple and stratified squamous epithelium in micrometers?
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09/25/23

Biochemistry HW QUESTION-I am stuck! Please help!
Indicate which of the amino acid residues in the following peptide sequence contains a group that has a negative charge for its most likely charge state at pH 10.Thr-Glu-Trp-Lys-Ser-Asn-Ile-Gly-Gln
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