Bio 201 Exam 1 Review With Accurate Solutions Latest Update

Proteins - ANSWER-made up of amino acids joined by peptide bonds Nucleic Acids - ANSWER-DNA and RNA Adenosine Triphosphate (ATP) - ANSWER-one of the principal chemical compounds that living things use to store and release energy The Cell Theory - ANSWER-1. All organisms are made up of cells 2. All cells must come from pre-existing cells. 3. The cell is the basic unit of all living things. The Plasma Membrane - ANSWER-surrounds and contains the cytoplasm of a cell. It is composed of proteins and lipids known as the lipid bi-layer; selectively permeable Microvilli - ANSWER-Tiny hair-like projections of the cytoplasmic membrane located only in the small intestine to facilitate absorption by increasing surface area. Cillia - ANSWER-hairlike structures with the capacity for movement Flagella - ANSWER-whiplike tails found in one-celled organisms to aid in movement; SPERM Membrane Transport - ANSWER-A primary function of membranes, involves the regulation of traffic of substances in and out of the cell and its organelles Filtration - ANSWER-a process that separates materials based on the size of their particles Simple Diffusion - ANSWER-the random movement of molecules from an area of high concentration to an area of low concentration element - ANSWER-a pure substance made of only one kind of atom compound - ANSWER-substance made up of two or more elements chemically combined atom - ANSWER-the smallest particle of an element covalent bond - ANSWER-a chemical bond that involves sharing a pair of electrons between atoms in a molecule dehydration synthesis - ANSWER-A chemical reaction in which two molecules are bonded together with the removal of a water molecule. cell - ANSWER-basic unit of life concentration gradient - ANSWER-the difference in the concentration of molecules across a distance