BOT3015 EXAM 2024 ACTUAL EXAM QUESTIONS AND DETAILED ANSWERS

BOT3015 EXAM 2024 ACTUAL EXAM QUESTIONS AND DETAILED ANSWERS mineral elements (inorganic nutrients) - Answers1. Macronutrients: used by plants in greater amounts, constitute 0.5%-0.3% of the dry weight of plant (N, K, Ca, P) 2. Micronutrients: needed by plant in very small amounts, few parts per million of dry weight (Na, Co) Certain algae require - AnswersVanadium, Silicon, Iodine hydroponics - Answersa technique of growing plants (without soil) in water containing dissolved nutrients Photosynthesis - Answersthe conversion of light energy into chemical energy, which ultimately produces carbohydrate, with oxygen being released as a byproduct water, carbon dioxide, and chlorophyll are essential Respiration - AnswersCellular breakdown of sugar and other foods, accompanied by release of energy in aerobic respiration, oxygen is utilized Metabolism - Answersthe sum of all interrelated chemical processes occurring in a living organism Enzymes - Answersproteins that speed up chemical reactions in cells without being used up in the reactions Anabolism - Answersmetabolic reactions in which chemical bonds are formed Catabolism - Answersmetabolic reactions which require chemical bonds to be broken Most reactions of photosynthesis are ____________ - Answersanabolic they involve construction of molecules that are stored for energy cellular respiration - Answersmetabolic process that involves the breakdown of carbohydrates to release energy Photosynthesis builds organic compounds by combining _________ - AnswersCO2, H2O forming carbohydrates Respiration breaks down - Answerscarbohydrates producing CO2, H2O oxidation-reduction reaction - Answerschemical reactions involving gain or loss of electrons to form a compound BOT3015 EXAM 2024 ACTUAL EXAM QUESTIONS AND DETAILED ANSWERS Oxidation - Answersis the loss of one or more electrons Reduction - Answersis the gain of one or more electrons When an electron is removed a _______ may follow - Answersproton results in H atom being often removed during oxidation and added during reduction Oxidations can occur without oxygen being involved - AnswersTrue Oil and coil provide _____ of energy needed to power trains, ships, factories, etc - Answers90% Worlds green organisms produce between 100 billion and 200 billion tos of sugur each year - AnswersTrue 1st products of photosynthesis may be converted to - AnswersDisaccharides: sucrose Polysaccharides: starch Photosynthesis produces more than 94% of the dry weight of green organisms - AnswersTrue 40-50% of oxygen in atmosphere originates in oceans and lakes - AnswersTrue PCBs - Answersindustrial pollutants that stop certain algae from carrying on photosynthesis ATP - Answersa molecule with 3 phosphate groups found i all living cells: it is the principal vehicle for energy storage and exchange in cell metabolism Our atmosphere is made up of - Answers78% nitrogen 21% oxygen 1% less common gasses (CO2, H, He, Ar, Ne) Less than ____ of water absorbed by plants is used in photosynthesis - Answers1% About ________ of the radiant energy we receive is in the form of visible light - Answers40% Leaves commonly absorb ______ of the visible light that reaches them - Answers80% Photorespiration - AnswersA metabolic pathway that consumes oxygen, releases carbon dioxide, generates no ATP, and decreases photosynthetic output; generally