1,722 Answered Questions for the topic biochemistry

Biochemistry Chemistry

02/26/20

Vinegar is a solution of acetic acid in water. If a 145 mL bottle of distilled vinegar contains 27.2 mL of acetic acid, what is the volume percent (v/v) of the solution?
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Biochemistry Chemistry

02/26/20

Calculate the mass percent (m/m) of a solution prepared by dissolving 46.41 g g of NaCl in 168.8 g of .
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Biochemistry Chemistry

02/26/20

The sedative Demerol hydrochloride has the formula C15H22ClNO2 . How many grams are in 0.030 moles of Demerol hydrochloride?
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Biochemistry Chemistry

02/26/20

Cyclopropane, C3H6 , is an anesthetic given by inhalation. How many grams are in 0.27 moles of cyclopropane?
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Biochemistry Chemistry

02/26/20

270. mLof a 3.05 M NaNO3 solution
Calculate the grams of solute needed to prepare
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02/23/20

Electron Withdrawing vs Electron Donating groups
Hello, could someone please explain how to determine if an R group is more electron withdrawing or donating in a benzene ring (e.g. phenols etc.) (especially explain if oxygen is electrowithdraw or... more
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Biochemistry Organic Chemistry

02/22/20

whats the running pressure in torr?
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals... more
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Biochemistry Chemistry

02/18/20

Equilibria Question
Upon conducting an electrophoretic mobility shift assay with DNA, 30% of your DNA is bound by a protein (P) when the total protein concentration is 2.0 μM and the total DNA concentration is 1 nM.... more
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Biochemistry Biology

02/05/20

What are the functions of lipids in our body ?
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Biochemistry Biology

02/05/20

Olive oil is water-insoluble because it is hydrophobic. Why is olive oil hydrophobic ?
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Biochemistry Chemistry

01/29/20

Chemistry Question
How many grams of NaCl (molecular weight = 58.5g mole^ -1) would you dissolve in water to make a 1M NaCl solution with 1-liter final volume ?
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01/29/20

Biology Question
How many grams of NaCl would you dissolve in water to make a 500 mM NaCl solution with 1-liter final volume ?
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01/29/20

Biology Question
How many grams of NaCl (molecular weight = 58.5g mole^ -1) would you dissolve in water to make a 1M NaCl solution with 1-liter final volume ?
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01/29/20

Biology Question
How many grams of sodium chloride would you dissolve in 500ml water (final 500ml) to make a 0.9% (w/v) saline solution ?
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01/29/20

Biology Question
How much milliliters of absolute ethanol (100% ethanol) would you mix with how much milliliter of pure water to make 100ml of 70% (v/v) ethanol solution ?
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01/18/20

Can someone help me please?
Question: Use a suitable diagram and explain the role of glutamate and AMPA/NMDA receptor interaction in the promotion of pyramidal cell excitability, accompanied by spine formation, in the... more
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01/10/20

Hydrogencarbonate

Sherbet lemons are sweets which consist of a flavoured sugar shell filled with sherbet. The sherbet contains sodium hydrogencarbonate, NaHCO3 and tartaric acid (2,3- dihydroxybutanedioic... more
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01/10/20

The simplest carboxylic acid is methanoic acid HCOOH. It occurs naturally in ants.
The simplest carboxylic acid is methanoic acid HCOOH. It occurs naturally in ants.When an ant bites, it injects a solution containing 50% by volume of methanoic acid. A typical ant may inject... more
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Biochemistry Science Chemistry Physics

01/04/20

A gas has a density of 0.791 g/L. What is the molar mass of this gas?
I wonder why the formula is m (mass) = p x V (density multiply with volume)But the answer key of the book is: Molar Mass (M) = g/L × 22.4 L/1 mole = p x VSO , in this situation , do we find mass =... more
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Biochemistry Organic Chemistry

12/29/19

I need help with understanding structural activity relationship of modified compounds.

I synthesized peptoid or mimics of Wollamide a TB antibiotic. I’m seeking to determine the structural activity relationship and understand stereochemistry of each compound. I need to know what’s... more
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Biochemistry Microbiology Pharmacology

12/22/19

I need help with a mix of microbiology/biochem/pharma/stereochem, see details below.

Hello, I need help with a mix of microbiology/biochem/pharma. I did an experiment where I made mimics of TB antibiotics in a lab. I need to understand the structural activity relationship of the... more
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12/20/19

To understand the structural activity relationship of a peptide drug molecule; see details below.

Hello, I need help with a mix of microbiology/biochem/chem/bio. I did an experiment where I made mimics of TB antibiotics in a lab. I need to understand the structural activity relationship of the... more
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12/18/19

I need to understand the structure activity relationship of an antibiotic compound and its bioactivity

Molecule: WollamideMade analogsChanged sterechemDisk Diffusion assayB. SubitulisThe question what is the mechanism of action of Wollamide and why other analogs didnt not work or not inhibted.
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12/18/19

I need to understand the structure activity relationship of an antibiotic compound and its bioactivity
Molecule: Wollamide Made analogsChanged sterechemDisk Diffusion assayB. Subitulis The question what is the mechanism of action of Wollamide and why other analogs didnt not work or not inhibted.
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Expert Answers •1

12/18/19

I am trying to go thrgouh this question and I need someone who is chemsity expert to try to solve this problem which is related to the contrant rates
You designed a contrast agent that incorporates folate so it can bind to folate receptors. When injected intravenously (IV), this contrast agent will mark circulating tumor cells, overexpressing... more
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