What is r in physics circular motion?
What is r in physics circular motion?
When an object is experiencing uniform circular motion, it is traveling in a circular path at a constant speed. If r is the radius of the path, and we define the period, T, as the time it takes to make a complete circle, then the speed is given by the circumference over the period.
What is r in chemistry?
Chemistry and physics equations commonly include “R”, which is the symbol for the gas constant, molar gas constant, or universal gas constant.
Is an R group?
R group: An abbreviation for any group in which a carbon or hydrogen atom is attached to the rest of the molecule. Sometimes used more loosely, to include other elements such as halogens, oxygen, or nitrogen.
What are R side chains?
Each of the 20 amino acids has a specific side chain, known as an R group, that is also attached to the α carbon. The R groups have a variety of shapes, sizes, charges, and reactivities. This allows amino acids to be grouped according to the chemical properties of their side chains.
What is chemical formula of protein?
Although amino acids may have other formulas, those in protein invariably have the general formula RCH(NH2)COOH, where C is carbon, H is hydrogen, N is nitrogen, O is oxygen, and R is a group, varying in composition and structure, called a side chain.
What is Sodium’s chemical formula?
Na
What is the pH of protein?
4 to 7
What is pH and pI?
The isoelectric point (pI, pH(I), IEP), is the pH at which a molecule carries no net electrical charge or is electrically neutral in the statistical mean. The standard nomenclature to represent the isoelectric point is pH(I). However, pI is also used.
What is our DNA?
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA. DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule.
Is DNA negative or positive?
Because DNA is negatively charged, molecular biologists often use agarose gel electrophoresis to separate different sized DNA fragments when DNA samples are subjected to an electric field — due to their negative charge, all the DNA fragments will migrate toward the positively charged electrode, but smaller DNA …
What is the pH of DNA?
5 to 9
Does pH affect DNA?
At pH 5 or lower, DNA is liable to depurination (i.e. the loss of purine bases from DNA). The phosphodiester bonds of DNA break which causes the base pairs of DNA to break off. At pH 9 or higher, DNA is susceptible to alkaline denaturation due to the abundance of hydroxide ions.
Is RNA acidic or basic?
RNA and deoxyribonucleic acid (DNA) are nucleic acids. Like DNA, RNA is assembled as a chain of nucleotides, but unlike DNA, RNA is found in nature as a single strand folded onto itself, rather than a paired double strand.
What charge does DNA have?
Explain why DNA has an overall negative charge. Phosphate groups in the DNA backbone carry negatively-charged oxygen molecules giving the phosphate-sugar backbone of DNA an overall negative charge. 5.
Where does DNA get its charge from?
The phosphate backbone of DNA is negatively charged due to the bonds created between the phosphorous atoms and the oxygen atoms. Each phosphate group contains one negatively charged oxygen atom, therefore the entire strand of DNA is negatively charged due to repeated phosphate groups.
What is used to cut the DNA?
In the laboratory, restriction enzymes (or restriction endonucleases) are used to cut DNA into smaller fragments. The cuts are always made at specific nucleotide sequences. Different restriction enzymes recognise and cut different DNA sequences.
What are the four in DNA?
Adenine, thymine, cytosine and guanine are the four nucleotides found in DNA.
What are the 3 basic building blocks of DNA?
DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating.
What are the 3 components of DNA?
In turn, each nucleotide is itself made up of three primary components: a nitrogen-containing region known as a nitrogenous base, a carbon-based sugar molecule called deoxyribose, and a phosphorus-containing region known as a phosphate group attached to the sugar molecule (Figure 1).