BIO 210 EXAM 1 Possible Questions and Answers with complete solution

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 substanceSpecific 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