BIOL 101 Lecture Notes - Lecture 2: Membrane Lipids, Cell Nucleus, Trans Fat
Document Summary
An atom"s mass number is the sum of the number of protons and neutrons in its nucleus. Isotopes are alternate mass forms of an element. The radioactive isotopes have many uses in research and medicine, they can. 8-30-16 be used to determine the fate of atoms in living organisms. Uncontrolled exposure to radioactive isotopes can harm living organisms by. Radiometric dating- use radioactive isotopes as a measure of dating. The bomb pulse- radiometric dating in line with nuclear testing lets us ee damaging dna into our own cells" age. Chemical reactions enable atoms to give up or acquire electrons, completing their outer shells. Ionic bonds are formed between oppositely charged ions. Covalent bonds- the sharing of a pair of electrons between two atoms. Organic compounds are those with a carbon backbone. Molecules of life- carbohydrates, lipids, proteins, nucleic acids. Monosaccharide"s- simple sugars make up more complex carbohydrates. Nucleic acids are made up of nucleotides monomers.
