1,722 Answered Questions for the topic biochemistry

05/24/19

How do bile salts affect lipase activity?
**BACKGROUND**: It is well known that bile salts are needed for emulsification of fats. It is then said that this increases the surface area for activity of pancreatic lipase, implying that bile... more
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Biochemistry Zoology Death Olfaction

05/24/19

What produces the strong odor of decaying dead animals?
Are there specific chemicals responsible for producing the strong, putrid odor that is present after an animal deceases? Also, how long does this odor last?
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05/24/19

Why do the humans become sleepy after meals?
I don't know about all the mankind, but I know enough people, who becomes sleepy after their meals. Also, I'm not sure, what kind of food do they consume, but I personally get sleepy almost from... more
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Biochemistry Microbiology Food Digestion

05/24/19

Human Digestion of Cellulose?
Most animals can digest the cellulose in grass because of the anaerobic bacteria called *Fibrobacter succinogenes* living in their rumen (gut). The bacteria produces the enzyme cellulase and is... more
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Biochemistry Physiology Cell Biology

05/24/19

What triggers meiosis in gonadal cells?
What specific biochemical processes are involved in inducing meiosis rather than mitosis? Why are gonadal cells the only cells in the human body which do undergo meiosis?
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05/24/19

Free Radicals for aging?
From my understanding free radicals play a slight role in ageing.In what ways are they so damaging, and can a restricted diet reduce production of free radicals?
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05/24/19

Why do plants store energy as carbohydrates and not as fats?
In my introductory biology class, we are learning about biomolecules. The textbook says fats are a more efficient energy store than carbohydrates.So my question is - why would plants store their... more
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Biochemistry Cell Membrane Biophysics

05/23/19

Why don't phospholipid bilayers dissolve?
I just started learning about the structure and composition of cell's membrane and there is something that I fail to understand. The membrane is composed of a phospholipid bilayer. The phospholipid... more
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Biochemistry Blood Circulation

05/22/19

Why are bruises not lethal?
Given the following:* bruises are caused by minor trauma which breaks blood vessels beneath the skin, causing bleeding* the mechanism by which bleeding stops is clotting* blood clots inside the... more
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05/22/19

Could hydrogen replace oxygen in cellular respiration?
I was wondering what oxygen actually does in the body. I have seen a few answers to other questions that involve the electron chain and I am really not sure what that is. So I was wondering what... more
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05/21/19

What is the difference between organelle membranes?
Cells and organelles are contained in [lipid bilayers](http://en.wikibooks.org/wiki/Structural_Biochemistry/Lipids/Lipid_Bilayer). I'm particularly interested in eukaryotic organelle bilayers and... more
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Biochemistry Cellular Respiration

05/21/19

Why isn't Fluorine, or Neon, the final electron acceptor in cellular respiration?
I'm a Chemistry student learning about periodic trends. I know that in (many organisms') cellular respiration, oxygen serves as the final electron acceptor due to its high... more
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05/21/19

Does body fat percentage effect storage of fat soluble compounds?
Would a person with a higher body fat percentage store more of a fat soluble compound, or store for a longer time, than a person with a lower body fat percentage if they both consumed the same... more
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05/21/19

What makes DNA sticky-ends sticky?
When restriction enzymes jaggedly cut double stranded DNA it results in so called sticky ends. What is the substance that makes the DNA sticky?
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05/21/19

From where does the oxygen in glucose come in photosynthesis?
Is it carbon dioxide or water? I'm talking about the oxygen present in glucose and not the oxygen that is released after photolysis of water.
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Biochemistry Dna Nucleic Acids

05/21/19

Does DNA react in all of the ways most other acids do?
As I understand it from my basic chemistry, there are some fundamental reactions that exist between any acid and other substances for example acid-base reactions that form a salt, and the existence... more
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Biochemistry

05/20/19

Why must you use a pencil, and not a ink or felt-tip pen, to mark on the paper the origin of the spots of amino acid preparations?
This question is from a separations of amino acids lab
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Biochemistry Neuroscience Sensation

05/19/19

Why does getting certain chemicals in cuts hurt?
More specifically, shampoo. What are the mechanics of detecting a noxious chemical stimulus in terms of which receptors recognise what, how do they do it, and how is this information relayed to the... more
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Biochemistry Science Biology Chemistry

05/17/19

Draw a small section of a typical lipid bilayer
1.     Draw a small section of a typical biological lipid bilayer. Include at least one of each membrane lipid (i.e., glycerophospholipid, sphingolipid, and sterol). (40 pts.)a.     Within your... more
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05/15/19

Domains in cell membrane?
How is movement of proteins and lipids between different domains of cell membrane prevented?Why is the noncytosolic layer not able to do lateral movements between domains but cytosolic layer is... more
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Biochemistry Mitochondria

05/15/19

Why is FAD, rather than NAD+, reduced in the succinate dehydrogenase reaction of the Tricarboxylic Acid Cycle?
FADH<sub>2</sub> is produced in the conversion of Succinate to Fumarate in the tricarboxylic acid cycle. Why is this so? Why not NADH?
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Biochemistry Toxicology Antibody

05/15/19

Is antivenom fatal?
Antivenom is used for curing snake bites. Is it fatal when used without being bitten by a snake?
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05/14/19

Why is ATP the preferred choice for energy carriers?
Why is ATP the most prevalent form of chemical energy storage and utilization in most cells?
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05/14/19

Why do people say that trans fatty acids are bad for your health?
I've heard from several sources that trans FAs are bad for you and their consumption will lead to cardiac problems, and that they are indigestible.But I also learned from biochemistry that they... more
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Biochemistry Lipids Fat Metabolism

05/13/19

Synthesis of Fatty Acids Longer than 16 Carbons?
I understand that the human body when performing Fatty Acid Synthesis can synthesize only until C16 (palmitate). However the ER has desaturases and elongases. I know that desaturases are used to... more
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