The Process of Photosynthesis Part 2
What are the major events that occur during the light reaction in the photosynthesis stage?
-NADPH and ATP are produced. -Oxygen gas is released. -Water is split.
Which equation best describes photosynthesis?
6CO2+6H2O+Light Energy→C6H12O6+6O2
The overall purpose of the Calvin cycle is to _____.
Build organic (carbon) molecules
Which type of carbon fixation happens only at night?
CAM
The dark reaction receives energy from the light reaction in the form of _____.
ATP
In what process is light energy from the sun transformed into chemical energy stored in the bonds of glucose molecules?
Photosynthesis
What process uses energy from the sun to produce food?
Photosynthesis
Melvin Calvin discovered:
The dark reactions of photosynthesis
Plants use energy from the sun to make glucose. What type of organism are they?
autotroph
Step three of the _____ _____ regenerates ribulose-5-phosphate, which is needed to restart the cycle.
calvin cycle
The most common _____ fixation pathway combines one molecule of CO2 with a 5-carbon sugar called ribulose biphosphate (RuBP).
carbon
During the Calvin cycle, ______ ____ is the process that converts carbon dioxide in the air to organic molecules of glucose.
carbon fixation
In both CAM and C4 plants, what happens first during the Calvin cycle?
carbon is fixed
What is the first part of the Calvin cycle?
carbon is fixed
The ATP and NADPH formed during the light reactions store _____ energy that is used during the Calvin cycle to build glucose.
chemical
What green pigment captures light energy needed for photosynthesis?
chlorophyll
Which of the following is NOT a pathway for carbon fixation?
chlorophyll
What is the main final product of the Calvin cycle?
glucose
A ______ is any organism, such as animals or fungi, that obtains energy from other living things.
heterotroph
During carbon fixation, low-energy inorganic CO2 is built into high-energy organic molecules, like glucose.
true
Leaves are a plant's major site of photosynthesis and gas exchange with the atmosphere. True or False?
true
RuBisCo catalyzes a reaction in the Calvin cycle.
true
Which plant tissue makes up leaf veins?
xylem, phloem
In the C3 pathway, the first stable compound is galactose.
false
Leaves can perform only photosynthesis.
false
Photosynthesis is the process to make food in the absence of sunlight.
false
Photosynthesis occurs in the epidermis of leaves.
false
Carbon dioxide for photosynthesis enters a leaf through pores called stomata.
true
The _____ cycle is an example of a recurring sequence of events that create products that become reactants in later events.
Calvin
Carbon dioxide is fixed. This process occurs in the ________ stage of photosynthesis.
Calvin cycle
During the Calvin cycle of photosynthesis, ____________.
Carbon dioxide is chemically changed into organic compounds
Attachment of carbon dioxide to _____ is the first step in the Calvin cycle.
RuBP (ribulose bisphosphate)
The enzyme ______ catalyzes the reaction that combines CO2 with a 5-carbon sugar, ribulose biphosphate, to initiate the Calvin cycle.
RuBisCo
Carbon fixation is the process of building low-energy inorganic glucose into high-energy organic
false
During photosynthesis, veins must control the transpiration of water vapor and the exchange of carbon dioxide and oxygen.
false
Electrons in chlorophyll jump to higher energy levels. This process occurs in the Calvin cycle stage of photosynthesis.
false
Glucose, the product of photosynthesis, is formed during the Krebs cycle.
false
In CAM plants, the stomata never opens.
false
How many turns of the Calvin cycle are needed to produce glucose?
six
___ molecules of carbon dioxide are necessary to make one molecule of glucose.
six, 6 (any of these)
CAM plants open their ______ at night to fix CO2 in order to prevent water loss.
stomata
Tiny openings under the leaf which normally allow CO2 to enter and O2 to leave the leaf are called
stomata
What type of food is made from the Calvin Cycle?
sugar
