bio chapter 9 quiz

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state 3 things that happen due do an oxidation reaction

1. a molecule will have an oxygen attached to it 2. electrons could be lost 3. protons could also be lost

state 3 things that could happen due to reduction

1. an oxygen atom could be chemically removed from a compound 2. electrons could be gained 3. protons could also be gained

rank these colors from greatest to least for their rate of photosynthesis

1. blue 2. red 3. purple

how many PGAL molecules are manufactured during the light independent reaction of photosynthesis

12

how many PGAL molecules are needed to make glucose

2

describe the use of water in light dependent reactions

2H₂O is split into 4e- that are used to make NADPH, 4H+ that fuel ATP production, and O₂ that is given off as waste

why is chlorophyll green

it reflects green wavelengths and absorbs the others

how is ATP manufactured during light dependent reactions

light is absorbed in the chlorophyll, and 2 waters are split into 2H+ and 2 e-. then the H+ is used to make ATP from ADP and a phosphate.

Define the second law of thermodynamics

no energy transformation is ever 100% efficient, there will always be a "loss" of energy to an unwanted form

why would a plant die after some time without sunlight

no light would not allow ATP or NADPH to form, so the calvin cycle could not happen, which would stop glucose production

what is the name of the enzyme that fixes CO₂ and RuBP

rubisco

how is NADPH manufactured in the light dependent reactions of photosynthesis

sunlight causes water to split into electrons and protons, so the e- combines with NADP+ to form NADPH

where do light independent reactions occur

the stroma of the chloroplast

where do light dependent reactions occur

the thylakoid in the chloroplast

in what way are NADPH and ATP used by plants

they fuel the calvin cycle

what is the formula for photosythesis

6CO₂ + 12H₂O → C₆H₁₂O₆+6O₂+6H₂O

what enzyme is used to manufacture ATP

ATP synthase

what gas is needed for the light independent reactions to occur? how many molecules are needed?

CO₂; 6 of them

Define the first law of thermodynamics

Energy can never be created or destroyed, only transferred or transformed

in photosynthesis, where do electons (e-1) and protons (H+) come from

H20

what 5 carbon sugar does CO₂ combine with as it enters the reactions

RuBP

name the 3 best colors for photoynthesis

blue, red purple

what pigment is the primary one that fuels photosynthesis

chlorophyll

how exactly does a plant loose water

enzymes on the inner surface of the thylakoid pull apart water molecules into 2 e-, 2H+ and an oxygen atom

what sugar is the final product of light independent reactions

glucose


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