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Biology Chapter 6
Homework, chapter, course notes, and lecture notes outline.
103
Biology
Undergraduate 2
10/07/2014

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Term
the relationship between the wavelengths of light energy and the energy they contain are
Definition
Higher energy in shorter wavelengths.
Term
the two major chemicals inputs for photosynthesis are carbon dioxide and
Definition
water
Term
What are 2 chemical outputs of photosynthesis?
Definition
Glycose and oxygen
Term
List the stages from the beginning to the end of the Calvin Cycle.
Definition
1. fixation of carbon dioxide
2. reduction of carbon dioxide
3. regeneration of RuBP
Term
Pigments are molecules capable of ___ light
Definition
Reflecting and absorbing
Term
what is the structure where photosynthesis occurs in plant cells?
Definition
Chloroplast
Term
most producers synthesize carbohydrates by the process of
Definition
photosynthesis
Term
photosynthesis is the process where plants…
Definition
Convert solar energy into chemical energy
Term
the _____, which are produced by plants, are the only source of energy for most organisms on earth.
Definition
carbohydrates
Term
match the compounds to its fate during the light reactions:
is oxidized
is absorbed
is produced
is reduced


NADP+
ATP
solar energy
Water
Definition
Water -> is oxidized
NADP+ -> is reduced
ATP -> is produced
Solar energy -> is absorbed
Term
what is the nonprotein helper that assists enzymes called?
Definition
Coenzyme
Term
during photosynthesis, electrons are received by ______ at the end of electron transport chain pathway
Definition
NADP+
Term
the two environmental conditions needed by C3 plants are:
Definition
Moderate temperature and rainfall.
Term
Photosystems I & II consist of...
Definition
A pigment complex (containing chlorophyll and carotenoid molecules) And Electron Acceptor
Term
Chlorophyll and other pigments absorb _____ energy
Definition
Solar
Term
Plants are green because they ____ the green wavelength of light
Definition
reflect
Term
the other molecule besides ATP that is produced in the light reaction of photosynthesis is:
Definition
NADPH
Term
a reaction involving oxidation and reduction at the same time is referred to as a _______ reaction
Definition
Redox
Term
the small pores through which CO2 enters the leaf and O2 exits the leaf are called:
Definition
Stomata
Term
the calvin cycle reactions occur in the _____ of the chloroplasts.
Definition
Stroma
Term
NADPH supplies the _____ needed to reduce carbon dioxide
Definition
electrons
Term
Hot dry weather causes C3 plants to ______ their stomata.
Definition
Close
Term
if a hydrogen atom (e- & H+) is gained by a molecule during a reaction, this is called….
Definition
Reduction
Term
the two sources of hydrogen ions in the thylakoid space during photosynthesis are:
Definition
Splitting water & NADPH from Photo system 1.
Term
the first molecule produced after carbon dioxide enters a C3 plant has ___ carbons
Definition
three
Term
the two sets of reactions during photosynthesis are the calvin cycle reactions and the ______ reactions
Definition
light
Term
in a C4 plant the Calvin cycle occurs only in the
Definition
Bundle Sheath Cells
Term
Wheat, rice, and oats are examples of:
Definition
C3 plants
Term
a stack of flattened thylakoid discs is called a ____
Definition
Granum (Grana is the plural form of the world)
Term
Which of the following is true about a C4 plant?
Definition
An enzyme fixes carbon dioxide into a four carbon compound instead of into a three carbon molecule.
Term
the three molecular complexes contained in the thylakoid membrane are:
Definition
Photosystems I & II, and the electron transport chain.
Term
during carbon dioxide _____, a molecule of RuBP is attached to a molecule of carbon dioxide.
Definition
fixation
Term
the 2 outer membranes of the chloroplast enclose a gelatinous matric called the
Definition
Stroma
Term
Coal is formed from plant bodies that lived very long ago, that is why it is called a _____ fuel
Definition
Fossil
Term
which of the following is a fluid within a chloroplast that contains enzymes involved in the synthesis of carbohydrates during photosynthesis?
Definition
Stroma
Term
carbon dioxide fixation occurs when ____
Definition
A molecule of CO2 is joined to RuBP
Term
Solar energy can be described by its _____ and its energy content
Definition
Wavelength
Term
When a molecule loses a hydrogen atom (e- + H+), the process is called:
Definition
Oxidation
Term
the two sources of hydrogen ions in the thylakoid space during photosynthesis are:
Definition
NADPH from Photosystem 1 and splitting of water.
Term
During the Calvin cycle, which takes place in the Stroma, carbon dioxide (Co2) is _____ to a carbohydrate. (G3P)
Definition
Reduced
Term
the _____ pathway uses different cells for carbon fixation and the Calvin cycle.
Definition
C4
Term
____ molecules of G3P have to be used to reform three molecules of RuBP.
Definition
five
Term
the primary advantage of the CAM pathway is:
Definition
conservation of water.
Term
the passage of electrons along a series of membrane-bound molecules from a higher to lower energy level is called the _____ ______ _______
Definition
ETC – Electron transport chain
Term
the electron acceptor in photosystem 1 passes electrons to a ____ molecule.
Definition
NADP+
Term
c3 plants and c4 plants both have mesophyll cells, but c4 plants also have ___ sheath cells.
Definition
Bundle
Term
as hydrogen ions diffuse through _____ the energy of their movement leads to the production of _____
Definition
ATP synthetase: ATP
Term
During hot, dry weather both C3 plants and C4 plants close their stomata, however c4 plants have an advantage over c3 plants. Why?
Definition
The RuBisCo in C4 plants is not exposed to enough oxygen. (in moderate weather c3 plants normally have an advantage)
Term
the energy to pump hydrogen ions into the thylakoid space is provided by electrons moving down the ____ ___ ___
Definition
ETC - Electron Transport Chain
Term
the energy required for the reduction of carbon dioxide during photosynthesis is obtained from molecules of _____
Definition
ATP
Term
the polysaccharide of which plant cell walls are formed is ____
Definition
Cellulose
Term
the function of “antenna pigments” in the light reaction of photosynthesis is:
Definition
To pass energy between pigments to the chlrophyll a reaction center.
Term
which of the following lists visible light from the longest to shortest wavelength?
Definition
Red, orange, yellow, green, blue, indigo, violet
Term
during photosynthesis, when a water molecule is split, the two ______ ions remain in the ____ space.
Definition
Hydrogen; thylakoid
Term
When the chlorophyll at the reaction center of photosystem II loses its electrons, these are replaced by electrons from:
Definition
Splitting water
Term
reduction of carbon dioxide is the sequence of reactions that uses ____ and ATP from the light reaction.
Definition
NADPH
Term
what is the molecule used by plants to make all other molecules?
Definition
G3P
Term
a cactus uses a photosynthetic process called _____ photosynthesis
Definition
CAM
Term
Which color has the longest visible wavelength?
Definition
Red
Term
CAM plants such as Cacti are adapted to dry climates and only open their ____ at night
Definition
Stomata
Term
Which term best describes the process by which plants produce food and oxygen using the sun’s energy?
Definition
Photosynthesis.
Term
Plants are green because they contain large amounts of green pigments called chlorophylls. What purpose does chlorophyll serve for plants?
Definition
It absorbs energy from the sun.
Term
Which term describes animals that feed solely on plants?
Definition
Herbivores.
Term
What color wavelengths does chlorophylls absorb the best?
Definition
Violet, Blue, and Red.
Term
Does Chlorophyll or Carotenoids reflect green light?
Definition
Chlorophyll.
Term
What causes leaves to appear green?
Definition
Chlorophyll.
Term
What are accessory pigments?
Definition
Carotenoids.
Term
When are carotenoids most noticeable?
Definition
In fall when leaves begin to change colors.
Term
what color do carotenoids appear to be?
Definition
Yellow or Orange.
Term
What range do carotenoids absorb color in?
Definition
Violet-blue-green range.
Term
What is the first step in the Calvin cycle?
Definition
The fixation of carbon dioxide
Term
What else is the Calvin cycle known as?
Definition
The light-independent reactions
Term
when carbon dioxide undergoes reduction, where is the energy supplied from?
Definition
ATP and NADPH from light reactions.
Term
The reduction of carbon dioxide produces the carbohydrate ____
Definition
Glyceraldehyde-3-phosphate
Term
in the second step of the Calvin cycle, carbon dioxide underdoes _____
Definition
Reduction.
Term
the Calvin cycle reactions of photosynthesis occur in the ____ of chloroplasts?
Definition
Stroma.
Term
The carbohydrate product that exists the Calvin cycle is ___
Definition
G3P
Term
It takes how many rounds of the Calvin cycle reactions to allow one molecule of G3P to exit before making carbohydrates?
Definition
Three
Term
G3P can be metabolized into _____, which can be combined with fructose to form ______
Definition
Glucose Phosphate; sucrose
Term
Glucose phosphate is also the starting point for the complex carbohydrates ____ and cellulose
Definition
Starch
Term
Plants that have evolved in hot, dry conditions carry out ….. photosynthesis instead of _______ photosynthesis
Definition
C4; C3
Term
In c4 photosynthesis, the first detachable molecule following carbon dioxide ____ is a molecule composed of ______ carbon atoms.
Definition
Fixation; Four
Term
in C4 plants, the Calvin cycle occurs only in the ______ cells.
Definition
Bundle Sheath
Term
C4 plants thrive in hot, dry climates where their ______ close, which prevents rubisco from being exposed to oxygen.
Definition
Stomata.
Term
In moderate climates, C3 plants ordinarily have the _____ over C4 plants.
Definition
Advantage.
Term
C3 Photosynthesis is named for:
Definition
3PG
Term
C3 Photosynthesis is carried out by many ______
Definition
Food crops
Term
C3 photosynthesis process occurs entirely_____ _____ _____
Definition
Within mesophyll cell.
Term
C4 photosynthesis pumps….
Definition
A four-carbon molecule into the bundle of sheath cells.
Term
A representation of a partitioning in space is….
Definition
C4 Photosynthesis.
Term
The Calvin cycle occurs in the bundle of sheath cells for ____ photosynthesis
Definition
C4
Term
Photosynthesis that occurs in warm climates…
Definition
C4
Term
Photosynthesis that occurs in hot and dry weather is _____
Definition
CAM
Term
Photosynthesis that is representation of partitioning in time:
Definition
CAM
Term
What photosynthesis aids in the conservation of water?
Definition
CAM
Term
CAM temporarily stores ______ _____ ______ in the ______ cells.
Definition
Four-carbon molecules; mesophyll
Term
What can be combined with Glucose Phosphate to from sucrose?
Definition
Fructose (it removes the phosphate.)
Term
What is sucrose?
Definition
The molecule that plants use to transport carbs from one part of the plant to another.
Term
What is glucose phosphate the starting point of?
Definition
The synthesis of starch and cellulose.
Term
What is starch?
Definition
The storage form of glucose
Term
where is most starch stored? Where is the rest stored?
Definition
Amyloplasts (plant roots). The rest is stored in chloroplasts.
Term
What is cellulose? What does it do and why?
Definition
A structural component of a plant cell wall. It serves as fiber in our diets because we are unable to digest it.
Term
What does H+ stand for?
Definition
Hydrogen
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