1,699 Answered Questions for the topic biochemistry

Biochemistry Physiology Human Biology

03/15/19

What is the mechanism behind "acquired" alcohol tolerance?
I can understand natural variation in alcohol dehydrogenase (ADH) in a population leading to variation in rate of inebriation (after controlling for other variables -- e.g., mass, food consumption,... more
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Biochemistry Chemistry

03/14/19

Why are inorganic compounds non-combustible?
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03/14/19

How exactly does marijuana damage brain cells?
I've heard that THC can cause permanent damage to brain cells. I've also heard this reffered to anti drug propaganda. Another theory i've read is that temporary effects reduce intelligence but long... more
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03/14/19

Why should I degas my gel solution for polyacrylamide gels?
In protocols for polyacrylamide gel electrophoresis (PAGE) I often see instructions to degas the gel solution by putting it under vacuum for 10-15 minutes before polymerizing the gel. I usually... more
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Biochemistry Zoology Entomology

03/13/19

How do ants follow each other?
I was observing ants in my house.They all were going in a straight line and also some of the ants were coming back through the the same line. I took some water and rubbed the line with my finger,... more
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03/11/19

Butanone + ethanol

What is the product of butan-2-one + ethanol the product of the reaction above reacts with ethanol to give what products?
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03/11/19

How can dissolved materials be moved from the outside to the inside of a cell when the inside concentration of the material is higher than the outside concentration?
a. Molecules can be moved into a cell against their concentration gradient if that transport is coupled with osmotic transport of water into the cell.b. Substances can be moved against a... more
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03/10/19

Products of a nonspontaneous reactions have a higher potential energy than the reactants. Which of the following statements are true? Select all that apply.
Select all that applya. ATP hydrolysis is an endergonic reaction that provides energy to drive exergonic reactionsb. Energy for nonspontaneous reactions comes from energetic coupling between... more
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03/10/19

why does ATP have high potential energy?
a. Four negative charges clustered together in the three phosphate groups raise the potential energy of the bonds.b. The repulsion between ribose and the phosphate groups raises the potential... more
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03/09/19

Nucleotide structure question
https://quizlet.com/_69plfz (image is at the top)What is true of the picture above it is an RNA molecule it is a DNA molecule #1 is a purine #2 is a pyrimidine . the molecules 5' end is the... more
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03/09/19

Saline hypertonic/hypotonic/isotonic question
A nurse attaches an IV to a patient that provides a saline solution that is 5% sodium chloride and 5% potassium phosphate and contains no other solutes. If the total solute concentration of a red... more
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03/09/19

Which of the following atoms can participate in hydrogen bonds?
a. carbonb. oxygenc. nitrogend. b and ce. all of the above
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03/09/19

Phospholipid Bilayer Question
Question: At the start of an experiment, a phospholipid-bilayer membrane that contains the glucose transporter (GLUT-1) but no other proteins separates a 1-liter solution of 1M NaCl (on the right)... more
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03/09/19

If the pH of a solution is 10 and the concentration of protons is increased 10 fold by the addition of acid what is the new concentration of protons?
a. 10^-10 Mb. 10^-11 Mc. 10^-9 Md. 1 Me. none of the above
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03/09/19

If you disrupt all hydrogen bonds in a protein what level of structure will be preserved?
a. tertiaryb. secondaryc. primaryd. quaternarye. all of the above
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03/09/19

What bonds must be destroyed for an RNA chain to be broken down into its monomeric nucleotides?
A. Phosphodiester bondsB. Covalent bondsC. Hydrogen bondsD. A and Be. A, B, and C
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Biochemistry Comprehensive Science

03/07/19

Which part of the brain helps maintain balance? a. cerebrum. b. brain stem. c. spinal cord. d. cerebellum.
Divisions of the Nervous System
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Biochemistry Comprehensive Science

03/07/19

Which of the following protects the spinal cord? a. sensory neurons. b. interneurons. c. vertebrae. d. none of the above.
Divisions of the Nervous System
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03/07/19

Which part of the cerebrum is associated with hearing and memory? a. Spinal cord c. Frontal lobe b. Temporal lobes d. Cerebellum
Divisions of the Nervous System
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Biochemistry

03/03/19

Calculate the volume of solute needed to make 750.0mL of 3.7% (w/v) sodium lactate solution?
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02/27/19

NH3 has a pKb of 4.74. What is the pH of a 3.2 x 10-4 mol L-1 NH3 solution?
I did this question 4 times and got it wrong, I keep getting 13 but the correct answer is 9.83, can someone please explain this to me?
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02/17/19

What type of reactions can CH3CH2NH+OH undergo?
Please Help! i don't know how to answer thisWhat type of reactions can CH3CH2NH+OH undergo?
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02/17/19

What type of reactions can CH3-CH2-O-CH=O undergo?
What type of reactions can CH3-CH2-O-CH=O undergo?Ive been stuck on this question for a few days now, I would really appreciate some help!
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Biochemistry Chemistry Maths

02/13/19

Include all the quantities required, concisely describe how you would make 50mL of a 0.5% (w/v) solution of BSA (molecular weight: 66 400) using water as a diluent
Include all the quantities required, concisely describe how you would make 50mL of a 0.5% (w/v) solution of BSA (molecular weight: 66 400) using water as a diluent
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Biochemistry Biology Chemistry

02/13/19

Predicting the concentration without doing any calculations

I’m very confused on this question.5 marksYou and Noel, your lab partner, had used the Beer-Lambert Law to calculate the concentration of light-absorbing solute, knowing its molar extinction... more
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