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Photosynthesis Quiz 12/9/11
Terms in this set (55)
is photosynthesis only performed by plants?
are phototrophs are the only type of autotrophs?
what organism performs the most photosynthesis?
what does photosynthesis do?
converts light energy to chemical energy
does photosynthesis only occur during the day
does photosynthesis convert organic compounds to inorganic compounds
what is unique about leaves
special organ adapted for catching and absorbing sunlight.
what organelle do phototrophic cells contain
what do chloroplasts contain
chlorophyll, a special green pigment.
does chlorophyll absorb green light?
no. it reflects it.
is chlorophyll the only pigment in chloroplast that absorbs sunlight?
what do plants and other phototrophs absorb
carbon dioxide to release oxygen
do plants need oxygen?
is glucose the only end product of photosynthesis?
is the oxygen released from phototrophs come from the oxygen originally found in carbon dioxide?
what is the overall reaction for photosynthesis
organisms obtain their energy from the sun, light energy, then they store it within organic compounds or carbohydrates. 6 Co 2+ 6 H20=glucose + 6O2
how does this compare to the overall reaction for cellular respiration
it is the reverse of the reaction for cellular respiration
where does the energy for photosynthesis come from
what plant pigments are involved in photosynthesis
chlorophyll a, chlorophyll b, and carotenoids
Explain why chlorophyll appears green to us in terms of what happens to different wavelengths of light that strike a chlorophyll molecule.
chlorophyll traps and abosorbs red wavelengths of light and blue, indigo, violet wavelengths at light. it is not good at absorbing green wave lengths so the green light is reflected.
how does the amount of energy in light change as the wave length increases
longer the wave length-less energy. shorter the wave length-more energy. violet light has more energy than the red light.
In what organelle of a plant cell does photosynthesis take place?
What are the two stages of photosynthesis?
light reactions and Calvin cycle
In which part of the chloroplast does each stage occur?
What happens to water molecules in the light reactions?
water molecules are split to give electrons.
What photosynthesis waste product is formed in the light reactions?
What two products of the light reactions are used up in the Calvin cycle?
ATP and NADPH
What happens to carbon dioxide molecules in the Calvin cycle reactions?
carbon dioxide molecules are bonded together with the electrons and H's from NADPH to form glucose.
How can cells store the sugar that is produced in photosynthesis?
store it as starch.
what are the types of photautotrophs
plants, algae, bacteria, protist
why do leaves turn colors in the fall?
the deactivate chlorophyll and activate caretanoids
why do leaves fall off trees and die soon after the color change?
the caretanoids don't photosynthesize as well, they can't produce as much glucose so they shut down the oxygen of leaves.
what is the chemical equation for photosyntehsis
6 CO2 (Carbon dioxide) + 6 H2O (water), combined with light energy, to form C6H12O6 (Glucose) + 6 O2 (oxygen gas)
has pores. is on the bottom of the leaf. releases water vapor. cO2 goes in and O2 comes out. it helps to exchange them using simple diffusion.
the middle part of the leaf. contains chloroplast.
in the chloroplast, what is the granum
the stacks of thylakoids, each stack.
what is a thylakoid in chloroplast
just one sac of the whole granum. site of light dependent reactions.
what is the stroma in chloroplast
the goo of the chloroplast
what are the parts of a chloroplast
granum, stroma, thylakoid, thylakoid compartment, inner membrane, outer membrane, intermembrane space
how do plants get the light needed for photosynthesis
chlorophyll, pigments in the thylakoid membranes.
how do plants get the water they need for photosynthesis
from their roots, they absorb it from the ground
how do plants get the carbon dioxide they need for photosynthesis
from their stromata, random diffusion takes place.
what does glucose help with after photosynthesis
helps the cell respire, the mitochondria to make atp so it can run cells.
pigment on the surface
takes in water with light energy, mixed with NADP and ADP. water splits to form oxygen gas. this energizes the electrons of chlorophyll and then make ATP and NADPH which then moves to the calvin cycle.
takes carbon dioxide and oxygen to makes glucose. it is then recycled to start the reaction over again.
chloroplast phospholipid membrane
contains integral proteins-photosystems.
the colors of light that chlorophyll absorbs are
red and blue
carbon atoms are fixed into organic compounds in
the calvin cycle
what molecules provide energy for the calvin cycle to occur?
ATP and NADPH
What product of the light reaction of photosynthesis is released and does not further participate in photosynthesis?
define photosynthesis and its equation
6 CO2 + 6H2O + light energy to C6H12O6 + 6 O2. carbon dioxide + water + light energy to glucose + oxygen gas. absorb energy from the sun and convert it to chemical energy.
what is the primary pigment molecule used in photosynthesis? Where is it located?
chlorophyll. located on the photosystems in the thylakoid membrane.
what is the main goal of the light reactions?
produce ATP and NADPH to be put into the calvin cycle.
what is the main goal of the calvin cycle?
to create glucose or a carbohydrate to be sent to the mitochondria.
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