In the electromagnetic spectrum, the type of radiation that we call visible light occurs between _____. - ANSWERSultraviolet radiation and infrared radiation
When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by _____. - ANSWERSsplitting water
Photosy...
Chapter 10 Bio 1305 Questions &
Answers
In the electromagnetic spectrum, the type of radiation that we call visible light occurs
between _____. - ANSWERSultraviolet radiation and infrared radiation
When light strikes chlorophyll molecules, they lose electrons, which are ultimately
replaced by _____. - ANSWERSsplitting water
Photosynthesis is a redox reaction. This means that H2O is _____ during the light
reactions and CO2 is _____ during the Calvin cycle. - ANSWERSoxidized...reduced
The overall function of the Calvin cycle is _____. - ANSWERSmaking sugar
C4 plants occur more commonly in desert conditions because _____ - ANSWERSthey
can fix carbon at the lower CO2 concentrations that develop when the stomata are
closed
Plants are photoautotrophs. What does this mean? - ANSWERSThey use light energy
to drive the synthesis of organic molecules from inorganic materials.
The ultimate source of energy to support most life on Earth is _____ -
ANSWERSsunlight
Which of the following statements is a correct distinction between autotrophs and
heterotrophs? - ANSWERSAutotrophs, but not heterotrophs, can nourish themselves
beginning with CO2 and other nutrients that are inorganic.
The photosynthetic membranes are found in the _____ in plant cells. -
ANSWERSchloroplasts
Where does the Calvin cycle take place? - ANSWERSstroma of the chloroplast
Which of the following is a product of the light reactions of photosynthesis? -
ANSWERSoxygen, ATP, and NADPH
Which of the following products of the light reactions of photosynthesis is consumed
during the Calvin cycle? - ANSWERSNADPH
Compared to C3 plants, C4 plants - ANSWERScan continue to fix CO2 even at
relatively low CO2 concentrations and high oxygen concentrations.
, CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do
this because they - ANSWERSfix CO2 into organic acids during the night
The light reactions of photosynthesis use _____ and produce _____ -
ANSWERSwater ... NADPH
Which term describes ATP production resulting from the capture of light energy by
chlorophyll? - ANSWERSPhotophosphorylation
According to the chemiosmotic hypothesis, what provides the energy that directly drives
ATP synthesis? - ANSWERSProton gradient
Which of the following particles can pass through the ATP synthase channel? -
ANSWERSProtons
_____ has a longer wavelength than _____ - ANSWERSRed ... green
Which process produces oxygen? - ANSWERSPhotosynthesis
Which set of reactions uses H2O and produces O2? - ANSWERSThe light-dependent
reactions
What is the importance of the light-independent reactions in terms of carbon flow in the
biosphere? - ANSWERSThe light-independent reactions turn CO2, a gas, into usable
carbon in the form of sugars.
Which of the following molecules is the primary product of photosystem I? -
ANSWERSNADPH
What is the biological significance of the light-independent reactions of photosynthesis?
- ANSWERSThey convert carbon dioxide to sugar.
Which of the following reactions ensures that the Calvin cycle can make a continuous
supply of glucose? - ANSWERSRegneration of RuBP
Carbon fixation involves the addition of carbon dioxide to _____ - ANSWERSRuBP
After 3-PGA is phosphorylated, it is reduced by _____ - ANSWERSNADPH
How many carbon dioxide molecules must be added to RuBP to make a single
molecule of glucose? - ANSWERS6
In the Calvin cycle, how many ATP molecules are required to regenerate RuBP from
five G3P molecules? - ANSWERS3
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