BIO 210 EXAM 1 QUESTIONS AND ANSWERS 100% PASS

BIO 210 EXAM 1 QUESTIONS AND ANSWERS 100% PASS Gene expression - Answer- the process by which information encoded in DNA directs the synthesis of proteins or; in some case, RNAs that are not translated into proteins and instead functions as RNAs Ionic bonds - Answer- Bonds that require donating and accepting electrons Emergent properties - Answer- Properties of a complex system that are not present within its parts but that emerge only when those parts are combined. Natural selection - Answer- A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits. Electronegativity - Answer- is a measure of the tendency of an atom to attract a bonding pair of electrons. Polar covalent bond - Answer- a covalent bond between atoms that differ in electronegativity. The shared electrons are pulled closer to the more electronegative atom, making it slightly negative and the other atom slightly positive Anion - Answer- A negatively charged ion Cation - Answer- A positively charged ion Van der Waals interactions - Answer- very weak interaction between molecules due to temporary charges attracting atoms that are very close together hydrogen bonds - Answer- A type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule. Adhesion - Answer- An attraction between molecules of different substances Cohesion - Answer- Attraction between molecules of the same substance Specific heat - Answer- The measure of the heat energy required to increase the temperature of a unit quantity of a substance by a certain temperature interval.The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree Celsius Evaporative cooling - Answer- The process in which the surface of an object becomes cooler during evaporation, a result of the molecules with the greatest kinetic energy changing from the liquid to the gaseous state Heat of vaporization - Answer- The amount of energy required for the liquid at its boiling point to become a gas Hydrocarbons - Answer- organic molecules consisting of only carbon and hydrogen cis/trans isomers - Answer- Trans- they are on opposite sides Cis- they are on the same side