BOT3015 EXAM 2024 ACTUAL EXAM QUESTIONS AND
DETAILED ANSWERS
mineral elements
(inorganic nutrients) - Answers1. Macronutrients: used by plants in
... [Show More] 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 [Show Less]