Sign Up Now
Get instant access to over 1 million+ study documents
OR
Already registered? click here to login
By creating your account, you agree to our terms of service, privacy policy and student honor code.
¶ … abundant elements that occur in living organisms are as follows: carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorous. These and all elements are made up of atoms, which are the primary units of matter. Molecules are groups of atoms that are covalently bonded. Covalent bonds occur when two atoms share one or more pairs of electrons. This is different from ionic bonds, which arise when an electrical attraction between two oppositely charged ions takes place. Elements are substances that cannot be chemically dissected into simpler kinds of matter. Compounds, however, are atoms of two or more elements that are united by chemical bonds.
The parts of an atom include protons, neutrons, and electrons. These are all called subatomic particles. Protons, which are part of the nucleus of an atom, have positive electrical charges. Neutrons, which are also part of the nucleus of an atom, and as the name indicates, are neutral -- they do not have any electrical charge. Rapidly rotating around the nucleus, electrons carry negative electrical charges.
Carbohydrates are organic compounds composed of carbon, hydrogen, and oxygen, with a typical ratio of 1:2:1, respectively; they tend to be polar; they are broken down during cellular respiration; and they provide most of the body's energy. Proteins, also organic compounds, consist of hydrogen, oxygen, carbon, and nitrogen atoms; they include chains of amino acids, which in turn form strings of polypeptides; they are usually soluble in water, salt solutions, or in alcohol; they have a coiled structure; and they are the major structural and functional material of body cells. Lipids are fatty compounds made of carbon, hydrogen, and oxygen, with an abundance of carbon-hydrogen bonds; they are not water soluble; and their purpose is to store energy. Nucleic acids are complex organic compounds that store important information in cells; they contain phosphorous, carbon, oxygen, hydrogen, and nitrogen; and they are mildly acidic. DNA and RNA are the most important types of nucleic acids.
They are compounds that have carbon, hydrogen and oxygen. There are 3 forms of carbohydrates. First are the monosaccharides which are simple sugars. They have simple structures in the ration of 1:2:1. They usually contain 5-6 atoms of carbon arranged in a 5-6 member ring. Oligosaccharides are monosaccharides which are combined in short strings that are linked together through dehydration synthesis. Sucrose is one of the oligosaccharides. It is
There are many different types of website that talk about biology; some of them include university websites which allows access to differing portals of biological information. Such websites as University of Michigan's "biology resource network" is an important source of information for all access to biology articles and databases from U. Of Michigan scholars and professors. Other websites include organization websites such as those of the American Society of
There are about 6 billion nucleotide letters of a particular sequence in a human cell. The full set is known as the genome. DNA information is found in units called genes. One gene codes roughly for one protein. The proteins perform most of the functions of the body at the cellular level. Examples are digestion, the body's defense against disease, and transporting substances throughout the body. Thousands of proteins
Chemistry The Many Dimension of Red Red is one of the oldest colors known to humans. It is a color that carries with it significant emotional meanings. Red occurs in nature on Earth and in the cosmos. It is a dynamic color affecting people and animals. The paper will explore the history of the color red with regard to its chemical properties, natural history, and cultural significance. The study of color proves
Biology Species Species D In evolutionary biology, parsimony is similar to the Ockham's razor hypothesis, or that nature will use the simplest method possible to effect change over time. Phylogenetic systematics is the manner in which biologists reconstruct the pattern of events that have led to evolution and the distribution of unique species. The statement "DNA is the genetic material for all prokaryotes and eukaryotes" implies that DNA is the locus material for evolutionary
This discovery could lead to cleaner energy, including the technology that could be used by factories and cars to capture carbon dioxide before it reaches the atmosphere. Carbon dioxide is polluting the Earth's atmosphere along with damaging coral reefs and marine life and has impacts that are irreversible. Scientists believe that this will be important for potentially getting to a viable carbon dioxide-capture material with ultra-high selectivity. They are optimistic