1,699 Answered Questions for the topic biochemistry

06/09/19

Why don't membrane proteins move?
I understand that based on their tertiary structure, intrinsic proteins have hydrophobic non-polar R-groups on their surface and that they 'interact with the hydrophobic core of the cell membrane... more
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Biochemistry Proteins

06/09/19

What is the process of degradation of proteins into amino acids inside living cells?
Just like beta oxidation does our cells have a distinct mechanism for degradation of proteins? There are processes for degradation of amino acids but where does these amino acids come from, is it... more
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06/09/19

Is tyrosine hydrophobic or hydrophilic?
I’ve seen tyrosine classified as a hydrophobic amino acid due to its aromatic ring in some textbooks and as hydrophilic due to its hydroxyl group in other textbooks. How does tyrosine actually... more
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Biochemistry Proteins

06/09/19

How does protein denaturation work?
I was wondering how protein denaturation works.1. Are there covalent bonds, such as disulfide bridges involved, or is it based purely on non-covalent bonds such as hydrogen bonds? Why is... more
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06/08/19

Conjugate acids and bases
What are conjugate acids and bases?
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06/05/19

Out of the Cell: toward the ribosome

Which is the cellular organelle that has two parts: Big and Small?
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Biochemistry Chemistry Mcat Teas

06/05/19

What is the difference between molarity and molality?
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06/05/19

Why do Kupffer cells not attack malarial sporozoites?
During malaria, why don't Kupffer cells (hepatic macrophages) attack the _Plasmodium_ sporozoites and stop schizogony, thus saving us from the disease?
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06/05/19

What is the difference between a cathode and an anode?
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Biochemistry Genetics Proteins Rna

06/04/19

Where do amino acids get attached to tRNA and where is it synthesized?
Some very basic parts of transcription/translation seem to be left out in various literature. I can't find the answer to this anywhere:How exactly is tRNA synthesized? I realize that mRNA is... more
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Biochemistry Photosynthesis

06/04/19

When is Water Produced During Photosynthesis?
The formula for photosynthesis is: $$6CO_2+12H_2O \\rightarrow C_6H_{12}O_6+6O_2+6H_2O$$I can count the carbons, the waters on the reactant side, the oxygens, and the glucose, but I cannot seem to... more
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Biochemistry Human Biology Metabolism

06/04/19

What is the molecular basis of hangovers?
Well, most of us have experienced the wonderful feeling of the dreaded hangover. How does it work exactly? I imagine it has something to do with dehydration but what are the underlying... more
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06/04/19

What came first? The DNA or the DNA polymerases?
I know this sounds a lot like chicken and egg question and while the latter has an answer, I am intrigued about the former.A modified form of the question would be, in the course of abiogenesis,... more
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Biochemistry Enzyme Kinetics

06/04/19

Why is competitive inhibition reversible?
My Biochemistry book mentions that 'competitive inhibition' is a reversible form of inhibition.<Br> But given that the inhibitor is blocking the active site and prevents an enzyme-substrate... more
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06/04/19

What is our skin made up of?
Again, it is a basic question. What is our skin made up of? is it made up of many cells arranged in a systematic way or is it just like any layer say of a book?? what is the difference? where is... more
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Biochemistry Cell Membrane

06/03/19

What is a membrane potential?
I know this may be silly, but I am confused to what a membrane potential actually is. I understand that at resting membrane potential is -70- -80 mV. But what does that exactly mean and how does... more
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06/03/19

How can a ligand be an integral membrane protein?
My background is in mathematics, and not biology, so please bear with me. I am currently working on a project involving the effects of Epidermal growth factor treatment (EGF) on cell migration. I... more
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Biochemistry Metabolism Insulin Liver

06/03/19

Why doesn't glucagon promote glycogenolysis in muscle?
Insulin stimulates glycogenesis in both liver and in muscles. Epinephrine stimulates glycogenolysis in both liver and muscles. But glucagon stimulates glycogenolysis in liver only. Why is this so?
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06/01/19

Why is oxygen needed for the electron transfer phosphorylation?
I understand that oxygen is the acceptor of electrons and hydrogen ions during the electron transfer phosphorylation, the last step off the ATP-producing aerobic respiration.But why?Aren't there... more
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06/01/19

Why is the DNA helix anti-parallel?
Why is it that DNA strands are running in anti-parallel fashion? Given the chemical base-pairing, they could have been parallel just as well.
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Biochemistry Biology Cancer Mutations

06/01/19

Is there any disease in adult human, other-than cancer, which-is resulted from mutation?
On all environmental articles I read about 3 impacts of mutagens (say Cigarette/ Naphthalene/ EtBr/ Colchicine/ ionizing radiation/ whatever )...**1**. direct effect on tissues, other than... more
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06/01/19

Do non-enzyme catalysed reaction pathways exist?
Can their be a kind of chemical reaction pathway in a cell, that is catalyzed or regulated but NOT necessarily by enzymes? I could not find anything on Google.I have almost no background in... more
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06/01/19

Why would lactate be high in diabetics?
Why are lactate level high in diabetes? For example, type II diabetes are resistant to insulin. If those patients are insulin resistant their gluconeogenesis should be working at a high rate and,... more
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Biochemistry Botany Photosynthesis

06/01/19

Which will produce more oxygen? A few large trees or a greater number of smaller plants?
In a given area A, we have two choices -(i) we can plant maximum number of trees (which are larger in size) possible in A, say mOR(ii) we can plant maximum number of plants (which are smaller in... more
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Biochemistry Cell Membrane Proteins

06/01/19

If proteins have an overall charge, how do membrane proteins traverse through the hydrophobic region of the plasma membrane?
These two concepts seem almost contradictory, proteins have a net negative charge due to the amino acids in them each having a small negative charge, yet membrane proteins are able to exist... more
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