1,729 Answered Questions for the topic biochemistry

Biochemistry Pharmacology Drugs

05/04/19

Why is the effect of competitive antagonist less than the effect of non-competetive antagonists?
Drugs can be provided as a competive or non-competitive form of agonists. But the effect of non-competitive antagonists is much more than the other, so what is the cause of that? And are there... more
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Biochemistry Physiology

05/02/19

Respiratory Physiology: Hemoglobin
A woman dumped a bucket of ice water over her head to raise global awareness about a neurological disease called amyotrophic lateral sclerosis, ALS. Which of the following correctly describes what... more
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04/30/19

How does the body switch between aerobic and anaerobic respiration?
Lets take the case of a person doing heavy exercise. Aerobic respiration is taking place, but oxygen is about to be finished up. Glycolysis occurs, Krebs cycle finishes. Now NADH and... more
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04/30/19

Why is too much glucose harmful?
I learned the citric acid cycle in biotechnology school and how cells work; about ADP and ATP and how the Cellular respiration (C6H12O6 + 6O2 -> 6CO2+6H2O) works.I am interested in understanding... more
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Biochemistry Biology Cell Biology Cell

04/28/19

Concentration dependent cellular processes?
Are there any famous biological processes that depend strongly on a chemical concentration reaching a particular value, like some sort of switch? E.g. if concentration of chemical x reaches... more
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Biochemistry

04/27/19

Why does Rigor Mortis occur after death?
After someone dies they become stiff, this is termed Rigor Mortis and happens because the cells run out of ATP (I think). But why do the cells need it to remain flexible?
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Biochemistry Botany

04/26/19

Are there any plants that fix their own nitrogen?
I know that most nitrogen is fixed through industrial processes and bacterial symbiotic relationships. However, are there any plants that can fix their own atmospheric nitrogen?
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Biochemistry Pharmacology Metabolism

04/23/19

Selective Androgen Receptor Agonist?
I'm looking for an inducer that strongly activates the androgen receptor, but not the glucocorticoid receptor that is not DEA regulated. I know that SARMS (Selective Androgen Receptor Modulators)... more
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Biochemistry Organic Chemistry

04/23/19

What are the olfactory chemicals in whiteboard/permanent markers and what do they bind to in the nose, lungs, and brain?
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04/21/19

When should endocytosis inhibitors be used in cell binding assays?
I'm beginning to do some cell-binding assays and I would like for my proteins to not be endocytosed by my mammalian cells. Typical suggestions are for the cells to be kept on ice and that the... more
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04/20/19

In which direction does ATP synthase rotate?
I heard about the rotation of ATP synthase in a biochemistry course. The professor said it will rotate counterclockwise. Is that true? If so, what mechanism defines its direction?
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04/20/19

Death because of distilled water consumption?
One of my friends said that I would die if I drank distilled water (we were using it in a chemistry experiment) I gave it a go and surprisingly did not die.I did a bit of... more
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Biochemistry Amino Acids Rna

04/19/19

What is the explanation for the smaller number of tRNA than codons?
> Translation, or decoding, of the four-nucleotide language of DNA and> mRNA into the 20–amino acid language of proteins requires tRNAs and> enzymes called aminoacyl-tRNA synthetases. To... more
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04/19/19

What is the relationship between the light and dark reactions of photosynthesis?
My main concern is why are the dark reactions (those that produce hexose) needed? As far as I understand, the sole purpose of photosynthesis is to synthesize carbohydrates, which are only used for... more
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Biochemistry Microbiology

04/19/19

Why don't antiseptic agents kill 100% germs?
I've seen innumerable antiseptic, mouthwash, handwash advertisements that claim to be able to eliminate as much as 99.9% of all germs over a surface...but why not the remaining 0.1% (i.e- why can't... more
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Biochemistry Botany Nutrition Allergies

04/18/19

What chemicals/substances exist in green capsicum (peppers) that do not exist in red capsicum?
I have known 3 people in my life that have incredibly adverse reactions (one called it an "allergy" and his symptoms did resemble such) to consuming any form of green pepper (capsicum) but have no... more
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04/18/19

Why do we have no enzyme to digest cellulose?
As we know, cellulose is the most abundant polysaccharide in nature. Why don't we have an enzyme to digest cellulose?
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Biochemistry Metabolism

04/18/19

Why can't the brain and red blood cells use fuels other than glucose?
The question is rather straight forward: I have always been curious as to why, but cannot find an explanation online.I can imagine that the mechanism is different for each, but **why does brain... more
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04/16/19

What's the mechanism for being mentally tired?
I notice that after long tests, or long periods of critical thinking, my body and mind feel noticeably tired. Why does this happen? Are the neurons in my head not firing as quickly, or is there... more
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Biochemistry Science Biology Anatomy

04/14/19

Why is ATP an important molecule in metabolism?
a. Its terminal phosphate group contains a strong covalent bond that does not contain much chemical energy b. Its hydrolysis provides an input of free energy for exergonic reactionsc. It provides... more
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Biochemistry Science Biology Chemistry

04/14/19

The major function of fermentation in our muscle cells is
A. to reduce NAD+ to NADHb. to generate lactic acid, which is later converted into fatty acid, which is a form of stored chemical energyc. not really known, and in fact it is believed fermentation... more
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04/14/19

What process below would speed up a reaction by lowering the activation energy?
A. Adding heatB. Adding a catalystC. Increasing the amounts of reactantsD. Increasing the entropyE. All of the above would speed up a reaction by lowering the activation energy
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Biochemistry Biology Chemistry

04/14/19

All chemical reactions that occur spontaneously
A. are endothermicB. Produce products that are more disordered than the reactantsC. Do not proceed more rapidly with provided heatD. Have a negative Delta G
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Biochemistry Biology

04/13/19

How can you distinguish poisonous mushrooms from edible ones?
The best rule to follow about telling safe mushroom from poisonous mushrooms is not to try! Despite what anyone may tell you, despite any "methods" you may know for telling them apart, you should... more
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04/12/19

What are the top 10 websites a chemistry student must visit?
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