BIO 101 Exam #1 Questions With 100% Correct Answers

BIO 101 Exam #1 Questions With 100% Correct Answers What is Biology? - answerStudy of life; encompasses everything -biomolecular biology and technology have brought around a new era for biology What are the major characteristics of Life? - answer1) reproduction (DNA (deoxyribose nucleic acid); double helix shape; stores genetic info) 2) cellular repsiration (used to creat energy) (metabolism; need it to perform basic functions of life; food (carbs, proteins, lipids/fats, vitamins/minerals) 3) adaptation/evolve (over large periods of times traits of organizations) modified 4) growth and development (DNA lays out the "plan") 5) organization (very specific; organization of organs/structure) 6) cells (basic building blocks of life; need only one to be considered living) 7) respond (response to stimuli (light, touch, heat, etc.); need in order to survive) What is a cell? - answer- basic building blocks of life - not always apparent; first seen with a microscope - cells were discovered by Hook in 1655 - first cells discovered were from cork - theory wasn't generally accepted due to the challenge of trying to convince people of this drastic change What is cell theory? - answer- proposed in 1800's - lowest level of structure perfoms all chracteristics of life - arise from previously existing cells What is metabolism? - answer- energy breakdown; needed for food - glucose is the "best" - C6H12O6 (formula for glucose) - breaks (catabolic reaction) down to carbon dioxide and water [ CO2 + H2O] Difference between anabolic and catabolic reactions? - answer- anabolic- building up of molcules, etc. - ie: anabolic steroids (build up muscle) - catabolic- breaking down of molecules Bean Beetle Lab - answer- learn how to determine if alive or dead - if alive, beetles should be giving off carbon dioxide - if dead, bean beetles may be giving off CO2 but only because the decomposition process - CO2 measured in ppm - calculate amount per bean beetle x (ppm)/ number of bb = ppm/bb every 15 mins = [x / # of bb] / 15 every 1 hour = [x/ #of bb] x 4 every sec = [x / # of bb] / 60 - used loggerpro prgm; used CO2 probe Are viruses alive? - answer- depends on what you argue - relies on a host cell to reproduce What is science? - answer- latin "to know" - asking questions about nature - believe questions can be answered Steps of the Scientific Method - answer1) Make an Observation 2) Ask a question 3) Form a Hypothesis ("if, then" statement) - accept (agree with conclusions) - reject (disagree, continue testing) 4) Exeperimental Design/ testing