Biochemistry

The primary structure of a folded protein is the linear sequence of amino acids linked together by peptide bonds. This sequence is derived from the protein's genetic information and serves as the foundation for its three-dimensional shape and function.

Leptin is the hormone that plays a key role in regulating hunger and energy balance. It is produced by fat cells and acts on the hypothalamus in the brain to signal satiety. When there is a deficiency of leptin or insensitivity to its effects, it can lead to increased hunger and obesity.

Yes, eating spicy food can temporarily increase your body temperature and make you feel warmer. This is because the active component in spicy foods, capsaicin, can stimulate your body's heat receptors and cause a sensation of warmth. However, this increase in body temperature is usually mild and not sustained.

Yes, both plant and animal cells contain lysosomes within the cytoplasm.

Chitin does not contain polymers, but is, rather, a polymer itself.

Chitin is a polysaccharide.

So, it is a polymer of saccharide subunits.

In this case, chitin has many N-acetyl-D-glucosamine subunits.

Lipids are nonpolar molecules that are hydrophobic in nature. They are insoluble in water but soluble in nonpolar solvents. Lipids serve as a source of energy, act as structural components of cell membranes, and play a role in cell signaling.

The building blocks of proteins are amino acids. There are 20 different amino acids that can combine in various sequences to form different proteins.

HCO3 - CO3 2-

CLO -

FLO -

BrO3 -

IO3 -

NO3 -

PO4 3-

SO4 2-

These are "ate" ions

if you subtract one oxygen by adding one more hydrogen, this would make it "ite' ion. There is -1 charge; subtract one from the charge.

ex. CO 3 2- turns into HCO3 -

The person would not produce H2CO3 quickly.

No, bones do not provide reserves of glycogen. Glycogen is stored in the liver and muscles, not in bones. Bones are primarily responsible for providing structure and support to the body, as well as producing blood cells and storing minerals like calcium and phosphorus.

insulin. Glucagon acts in opposition to insulin by promoting the release of stored glucose from the liver into the bloodstream, leading to increased blood sugar levels. This helps balance blood sugar levels during fasting or times of energy need.

The 3-carbon molecule produced when glucose is broken in half in glycolysis is pyruvic acid. It gives energy to living cells through the Krebs cycle.

Brine is essentially salty water, usually with sodium chloride. It's saturated, or very nearly saturated, meaning that its at the point where no, or little more salt could be dissolved into the solution.

The oxidized form of the most common electron carrier needed in both glycolysis and the Krebs cycle is NAD+ (nicotinamide adenine dinucleotide). NAD+ accepts electrons during the oxidation of substrates and is converted to its reduced form, NADH, which then delivers the electrons to the electron transport chain for ATP production.

The products of the elctron transport chain are ATP, oxidized NAD+ ions, and H2O.

Proteins that act as enzymes typically have a specific three-dimensional structure called an active site. This active site is where the enzyme binds to its target molecule, known as the substrate, to catalyze a chemical reaction. The structure of the active site allows enzymes to be highly specific in their function.

Yes it does. It also commonly contains quaternary structure.

Secondary structure refers to folding and bonding interactions between atoms of the polypeptide backbone, either forming alpha-helices or Beta-sheets. Oxytocin contains both of these secondary structures as well as Beta-turns. Beta-sheets come in anti-parallel and parallel versions. Parallel means that the direction of the associated chains run in the same direction; N-terminus to C-terminus. Anti-parallel means that one or more of the associated chains run in an opposite direction to the others.


Tertiary structure refers to interactions between side chains of the polypeptide residues. a good example of this is the disulfide bonds liking two cysteine residues which does occur in Oxytocin.


Quaternary structure refers to association of separate polypeptide chains. Oxytocin can be found as a single chain in which case there is no quaternary structure. It is not uncommon however to find it as a pentamer, tetramer, or dimer. Conditions play a major factor in effecting its quaternary structure. whether it is in aqueous solution, biological conditions (cells), or crystallized. Another good example of quaternary structure is Hemoglobin. Hemoglobin is a dimer of dimers. 2 alpha-globin chains and 2 beta-globin chains.

Methionine is formylated in prokaryotes to signal the start of translation at the ribosome. This formylation is absent in eukaryotes because they use a different mechanism, relying on the recognition of the 5' cap structure on mRNA to initiate translation instead.

PKU stands for phenylketonuria, the classic symptom of which (and the diagnostic test for the disease) is phenylalanine in the urine. This is a genetic disorder in which the body is unable to process phenylalalanine, so it is excreted in the urine.

Approved medications prescribed by a healthcare professional based on your specific medical condition can be helpful in treating various illnesses, such as antibiotics for bacterial infections, insulin for diabetes, or antidepressants for mental health disorders. It is important to follow your doctor's advice and not self-medicate.

No, amino acids are not steroids. Amino acids are the building blocks of proteins and play essential roles in various biological processes, while steroids are a type of lipid characterized by a carbon skeleton consisting of four fused rings.

Sucrose is the disaccharide that, upon hydrolysis by the enzyme sucrase, yields glucose and fructose.

Yes, but way of exposure to the sun. Very few foods contain vitamin D so synthesis of vitamin D in the skin is the major natural source of the vitamin. Vitamins A, D, and B12 are stored in significant amounts in the human body, mainly in the liver. But after the stores are gone, there will be a deficiency condition. Well-known human vitamin deficiencies involve thiamine (beriberi), niacin (pellagra), vitamin C (scurvy), and vitamin D (rickets).

Reducing sugars can be sourced from fruits, honey, and some vegetables like carrots. Non-reducing sugars are commonly found in foods like table sugar (sucrose) and milk. Both types of sugars play important roles in our diet and provide energy for the body.

Copper (Cu) is oxidized by atmospheric oxygen (O2) through a redox reaction where Cu atoms lose electrons to oxygen molecules, forming copper oxide (CuO). This process occurs in the presence of moisture and leads to the formation of a greenish layer of copper oxide (patina) on the copper surface over time.