Biochemistry

Fingernails generally collect more bacteria than toenails, as hands are used more frequently and come into contact with surfaces that may harbor bacteria. Additionally, hands are more prone to exposure to dirt, food, and other potential sources of bacteria.

There are two structures for this.

The structure of Glycine is a central C with 4 branches, each (COOH), (H), (H) and (NH2).

The structure of Phenylalanine is a central C with 4 branches, each (COOH), (H), (NH2) and (CH2benzene).

A peptide bond joins any two amino acids (including these ones) by the COOH group of one AA to the NH2 of the other AA, so you can see that there are two variations.

benzene-CH2-C(H)(NH2)-C(=O)-NH-C(H)(H)-C(=O)(OH)

or

benzene-CH2-C(H)(COOH)-NH-C(=O)-C(NH2)(H)(H)

The DNA molecule is a long term molecule which has to be highly conserved in order to be able to continue to provide the code for protein synthesis. Its double strand offers some protection against mutations, and allows mRNA to copy information off both strands simultaneously, increasing the efficiency of the event. mRNA is used to copy the DNA code and transport it to the cytoplasm, where it interacts with other RNA molecules to produce a protein product. When the protein has been made the mRNA is no longer used - it is a short term molecule. The strand needs to be able to pass through the rRNA and allow tRNA to add complementary bases to form the protein product. Mutations in the single stranded mRNA are not too catastrophic for the cells, as the molecule does not last for a great length of time, and further copies of the DNA can be made that are not muated in order to create the appropriate protein product.

are the cytoplasmic particles which convert the base codes of all of the cell's mRNA's (the messages transcribed from genes) into protein sequences, to produce all of the proteins in the cell.

Change in enzyme concentration through gene expression.

The result of growth in agricultural production in the late 1920 were things such as-

construction of dikes and dams,use of fertilizers in farming, small farms to large farms, crop rotation, invention of the seed drill, farm journal-which was as newspaper, but for farmers giving them ideas on how to farm, and newspapers. These are some of the basic and important results of the agricultural production. And this lead to the increase of population as well as migration.Then that caused a new revolution the energy revolution or new technology.

Citrate synthase is inhibited by ATP. Obviously, the Krebs cycle produces ATP. This is the first step and one of the major regulatory steps in the pathway. If the cell has plenty of ATP, then it wouldn't need to keep making it, thus the pathway needs to be shut off. ATP inhibits the enzyme to shut off the pathway. This is an example of feedback inhibition (you can also call it negative inhibition or even product inhibition). Feedback inhibition is when the products of a certain biochemical pathway inhibit earlier enzymes, shutting down the pathway.

The nucleus of an atom is far too small to be "seen" in any conventional sense. The structure of the atom, that is, the one with most of the mass of the atom concentrated in the center, or nucleus, was developed by physicist Ernest Rutherford. In a sense, he is the one who first "saw" the nucleus of the atom. A link to the Wikipedia article on the atom, an article which includes the history of discoveries that lead to modern concepts of it, is provided. A link is also provided to the Rutherford model of the atom, also at Wikipedia. Hey, the nice folks at Wikipedia post knowledge for free. Why not surf on over and help yourself? It's a buffet, with all you can eat.

cancer cells divide rapidly where normal cell don't.

MITOCONDRION

One common structural analysis formula is the equation for calculating bending stress in a beam, which is σ = M*y / I, where σ is the bending stress, M is the bending moment on the beam, y is the distance from the neutral axis to the point of interest, and I is the moment of inertia of the beam's cross-sectional area. This formula is fundamental in determining the maximum stress a beam can withstand before failure.

Ribose: Ribose is an Aldopentose sugar, and all aldose sugars are reducing sugars. The non-reducing sugars are ketose sugars which contain a ketone functional group. For ex: Ketose = Sucrose. For ex: Aldose = Glucose, Fructose, Lactose

Hydrophobic literally means "fear of water." It's used in chemistry to refer to "greasy" molecules (the opposite term is "hydrophilic", which means "water-loving") that don't dissolve readily in water. In medicine, it's an old term for rabies, which as one of its effects makes it painful to swallow; an animal with rabies often avoids water despite being thirsty because swallowing hurts so much.

== == No; one can safely take both supplements. However, vitamin C can cause a copper deficiency with prolonged high doses (more than 20 times the Recommended Daily Allowance (RDA) for months, for example). Unless you are taking extremely high-dose supplements, you are not likely to have this problem. Additionally, vitamin C intake levels above the RDA have not shown any additional benefit in controlled experiments. Unless there is some indication that your intake of vitamin C is deficient, it is likely that you will not benefit from the additional vitamin C supplement.

The absorption of proteins at 280nm is according to electrons from the rings on the amino acid such as His, Trp, etc. And if there is no such kind of amino acids in the protein, we might not be able to get what the amount of the protein really is. At the other hand, what makes biuret reaction work is by the copper ion reacting with the dipeptide bonds, since every amino acid has the peptide bond, it's more accurate and reasonable to use biuret reactions to determine what the amount of the protein is.

A nucleic acid is a macromolecule that is essential for storing and transmitting genetic information in cells. It is made up of nucleotide subunits, which contain a sugar, a phosphate group, and a nitrogenous base. There are two main types of nucleic acids: DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).

YES!! You will still get your vitamins, but not only that, if you are drinking Coke along with it, you're also getting calories with it! Cut down on pop (soda, soft drinks) because it's not good for your health at all. I stopped drinking any kind of pop for at least three months, strictly and seriously. I got rid of a nice layer of fat, and I only weigh about 145 lbs. and only have six percent body fat, so I am cut up and my six-packs are in even nicer shape. Yes, the vitamins and nutrients are absorbed in the small intestines. So, the acid from the Coke will have been mixed with the sugar and the protein to be absorbed after it leaves the stomach.

Proteins are the workhorses of biological macromolecules. Some form enzymes that catalyze biochemical reactions, which are necessary for metabolism. Others give cells structure and support, such as proteins in the cytoskeleton. They also play vital roles in cell signaling, immune responses, the cell cycle, and many other biological activities. You can think of it this way: Anything that you can describe happening in a living organism, most likely proteins are either making it happen or regulating it.

Secondary structure refers to local folding patterns involving hydrogen bonding between the peptide backbone, forming alpha helices or beta sheets. Tertiary structure involves the overall 3D folding of the entire polypeptide chain, with interactions between side chains such as hydrophobic interactions, hydrogen bonding, disulfide bridges, and electrostatic interactions playing a major role in maintaining the structure.

Everyone, from birth and even before, produces enzymes that allow us to digest and metabolyze and to perform the basic, chemical level activities that are needed for life.

The question you MIGHT have been wanting to ask is, "what age group has active HORMONES?" Typically, sex hormones start to become active at about the time that secondary sex characteristics start to develop. For boys, it's hair on the legs, beard, pubic hair, voice change and other changes that start to show up like pimples. For girls it's much the same, but of course girls don't get the beard, they typically have breasts start to develop during that time. That's went he sex hormones START. If you're normal and nothing goes wrong, sex hormones will be active for the rest of your life in one degree or another. It's just that during puberty (when the sex hormones start and some argue are most active) there seems to be a "newly discovered" aspect of life that causes teens to act like it hasn't happened to anyone before them.

Maturity and experience teach us how to live with those hormones.

Pyruvate or Pyruvic acid is the end product of the anaerobic portion of glycolysis. If the cell has enough oxygen to run aerobic respiration then pyruvate is converted into acetyl-CoA and carbon dioxide byt eh enzyme pyruvate carboxylase. If there isn't enough oxygen in the cell, then pyruvate is converted to lactic acid in order to free up some of the required reactants(NAD+). This allows anaerobic glycolysis to continue.
an ester or salt of pyruvic acid.
Pyruvate is an organic acid, which can be formed from glucose through glycolysis, can form lactic acid, provides energy for cells in the citric acid cycle, and can be converted to fatty acids or carbohydrates.

a purple /violet ring is formed at the junction .. that's what i get in our experiment.. and its correct..:)

We supply Visking tubing and offer the following information: The molecular weight cut-off of this product is 12000 - 14000 daltons. This means in theory that molecules larger in MW than this will not pass through the membranes and ones smaller will. Starch has a very high molecular weight and the tubing is often used to illustrate the effect of enzymes breaking starch down into to simple sugars. Starch therefore should not pass through the membrane wall. The user of this product should be aware that this is a nominal cut-off and long thin molecules above the 14kd cut-off may go through and globular molecules below may be retained. In addition the charge on a molecule may effect the rate of transfer across the membrane.