Biology 3 Ch 6 Acquiring Energy from the Sun
Terms in this set (30)
If you provided your shade-tolerant plants with their preferred wavelength of light, but only minimal amounts of water, which of the following would you expect to occur?
A) increased plant growth
B) increased amounts of oxygen released by the plants
C) decreased amounts of ATP being produced by the plants
D) increased growth of the plants' roots
E) increased growth of the plants' leaves
Decreased plant growth
What name is given to a discrete packet of light?
What is the function of stomata?
A) water absorption
B) location of photosystems
C) Calvin cycle
D) gas exchange
The energy of wavelengths that appear ______ is least useful to photosynthesis.
What are grana?
A) pigments found in choloroplasts
B) sacs that surround the stroma
C) thick fluids inside choloroplasts
D) convolutions of the inner chloroplast
E) stacks of membranous sacs
Stacks of membranous sacs
CAM plants conserve water by ______.
A) incorporating CO2 into RuBP
B) running the Calvin cycle at night
C) growing very deep roots
D) keeping their stomata closed at night
E) opening their stomata only at night
Opening their stomata only at night
The light reactions of photosynthesis take place ______.
A) in the inner membrane
B) on the cristae
C) in the thylakoid membrane
D) in the cytosol
E) in the stroma
In the thylakoid membrane
What is responsible for the yellow-orange coloration of leaves in the fall?
B) chlorophyll a
D) chlorophyll b
What is one reason why plants have accessory pigment molecules, like chlorophyll b and carotenoids?
A) to give them different colors
B) to absorb energy in parts of the electromagnetic spectrum that chlorophyll a cannot
C) because chlorophyll a can get burnt out by intense sunlight during the summer
D) to reflect more energy
E) because plants cannot make enough chlorophyll a for all of their energy needs
To absorb energy in parts of the electromagnetic spectrum that chlorophyll a cannot
The color that we see when looking at a pigmented object is ______.
A) the wavelengths that are reflected or transmitted by the pigmented object
B) the wavelengths that have been used and discarded by the pigmented object
C) the wavelengths that have been raised to an excited state by the pigmented object
D) the wavelengths that are absorbed by the pigment
E) the wavelengths that the pigmented object created after interacting with sunlight
The wavelengths that are reflected or transmitted by the pigmented object
If a plant appears blue to us, what wavelength of light is being reflected?
Photosynthesis contributes to plant growth by _____.
A) converting sugar to oxygen and water
B) taking in carbon dioxide and making sugars (carbohydrates)
C) releasing the energy in cellulose to make new leaves and roots
D) synthesizing carbon dioxide and making cellulose
E) taking in oxygen and making wood
Taking in carbon dioxide and making sugars (carboydrates)
The Calvin cycle makes direct use of ______ to make ______.
A) CO2, ATP, and NADPH . . . sugar
B) CO2, ATP, and NADPH . . . sugar and O2
C) light energy, CO2, and water . . . sugar and O2
D) light energy and CO2 . . . sugar
E) sugar and O2 . . . CO2, NADPH, and ATP
CO2, ATP, and NADPH . . . sugar
In photosynthesis, redox reactions ultimately transfer electrons from ______ to ______.
A) CO2 . . . O2
B) H2O . . . CO2
C) C6H12O6 . . . O2
D) O2 . . . CO2
E) H2O . . . C6H12O6
Which of the following is an autotroph?
E) pine tree
Which of the following is an autotroph?
E) pine tree
The products of the light reactions of photosynthesis are ______.
A) ATP and NAD+
B) RuBP and O2
C) ATP and NADPH
D) ATP and NADP+
E) ATP and NADH
ATP and NADPH
What compound is found at the reaction center of a photosystem?
A) chlorophyll b
C) chlorophyll a
E) chlorophyll c
Which of the following is a way that a molecule releases energy gained by absorption of a photon?
A) loss of an electron
E) all of the above
All of the above
The shorter the wavelength of visible light, the ______.
A) greener the color
B) less energy absorbed by photosynthetic pigments
C) greater the energy
D) redder the color
E) more photons it contains
Greater the energy
In photosynthesis, an H+ ion gradient forms across the ______.
A) outer chloroplast membrane
B) stromal membrane
C) inner chloroplast membrane
E) thylakoid membrane
Which of the following is found in both cellular respiration and in the light reactions of photosynthesis?
B) lactic acid fermentation
C) citric acid cycle
D) electron transport chain
E) Calvin cycle
Electron transport chain
Through what structure(s) do plants obtain most of their water?
C) interior cells
In which organelle does photosynthesis take place?
D) rough endoplasmic reticulum
Which of the following equations best summarizes photosynthesis?
A) 6 CO2 + 6 H2O + 6 O2 > C6H12O6
B) 6 O2 + 6 H2O > C6H12O6 + 6 CO2
C) 6 CO2 + 6 O2 > C6H12O6 + 6 H2O
D) C6H12O6 + 6 O2 > 6 CO2 + 6 H2O
E) 6 CO2 + 6 H2O > C6H12O6 + 6 O2
6 CO2 + 6 H2O > C6H12O6 + 6 O2
When a molecule absorbs a photon, one of its electrons is raised to the ______ state.
Where are photosystems located?
C) thylakoid membrane
E) inner chloroplast membrane
C4 plants conserve water by ______.
A) shuttling CO2 from the Calvin cycle to the water-splitting photosystem
B) growing very deep roots
C) incorporating CO2 into RuBP
D) keeping their stomata closed when the weather is hot and dry
E) running the Calvin cycle at night
Shuttling CO2 from the Calvin cycle to the the water-splitting photosystem
______ is the source of the oxygen gas released by a photosystem.
E) Chlorophyll a
The light reactions of photosynthesis convert
______ energy to ______ energy.
A) electrical . . . solar
B) solar . . . chemical
C) ATP . . . NADPH
D) proton gradient . . . chemical
E) chemical . . . electrical
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