Chapter 7 Biology 101

6 CO2 + 6 H20 ? C6H12O6 + 6 O2
The overall equation for photosynthesis is
PLANTS THAT GET ADEQUATE AMOUNTS OF LIGHT ARE OFTEN TALL AND SPINDLY, WITH PALE GREEN LEAVES THAT ARE SMALL AND SPREAD FAR APART
Which one of the following statements is not true?
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MAKE ORGANIC FOOD MOLECULES FROM INORGANIC RAW MATERIALS
Autotrophs
FUNGI
Which of the following is not an example of a photosynthetic autotroph?
PHOTOSYNTHETIC AUTOTROPHS
Autotrophs that utilize light as their energy source are
SUSTAIN THEMSELVES WITHOUT EATING; MAKE ORGANIC FOOD MOLECULES FROM SIMPLE RAW MATERIALS; MANUFACTURE THE BIOSPHERE’S FOOD SUPPLY; ARE AUTOTROPHS
Producers
CONCENTRATED IN A ZONE OF LEAF TISSUE CALLED THE MESOPHYLL
In most green plants, chloroplasts are
like membranous sacs arranged in stacks called ;GRANA
Chloroplasts contain disk
STROMA
In the chloroplast, sugars are made in a compartment that is filled with a thick fluid called the
THYLAKOID MEMBRANES
Where is chlorophyll found in a plant cell?
STOMATA
CO2 enters and O2 escapes from a leaf via
WATER
The oxygen released into the air as a product of photosynthesis comes from
H2O
Which one of the following molecules is both a reactant and a product of photosynthesis?
H IN GLUCOSE AND WATER; O IN O2
If you expose a photosynthesizing plant to water that contains both radioactive H and radioactive O, in which of the products of photosynthesis will the radioactive H and O show up?
IN PHOTOSYNTHESIS, CO2 IS REDUCED TO FORM SUGAR WHILE IN RESPIRATION, SUGAR IS OXIDIZED TO FORM CARBON DIOXIDE
Which of the following is true concerning the role of redox reactions in photosynthesis and cellular respiration?
ATP IS ONLY PRODUCED DURING RESPIRATION. ATP IS NOT PRODUCED DURING PHOTOSYNTHESIS
Which one of the following statements is not true?
THYLAKOID MEMBRANES . . . STROMA
The light reactions occur in the ___ while the Calvin cycle occurs in the ___.
ATP, NADPH, O2
Which of the following are produced during the light reactions of photosynthesis?
GLUCOSE ADP, NADP+
Which of the following are produced during the Calvin cycle?
OCCURS WHEN CARBON AND OXYGEN FROM CO2 ARE INCORPORATED INTO AN ORGANIC MOLECULE
Carbon fixation
; FORMATION OF WASTE PRODUCTS IN THE FORM OF CO2
The Calvin cycle involves all of the following except:
ELECTROMAGNETIC AND KINETIC
Sunlight is a type of ___ energy.
CHLOROPHYLL REFLECTS GREEN LIGHT
Why are (most) plants green?
PASSES ABSORBED ENERGY TO CHLOROPHYLL A
Chlorophyll b
CAROTENOIDS
During the fall many trees break down the chlorophyll in their leaves. The color of these leaves during the fall is attributable to
CHLOROPHYLL A
Which one of the following photosynthetic pigments can be found at the photosystem reaction center?
DONATION OF EXCITED ELECTRONS BY CHLOROPHYLL A TO A PRIMARY ELECTRON ACCEPTOR
Which one of the following is a normal process of photosynthesis that would be unable to occur if all reaction centers were inactivated by a toxin?
THEY PREFERENTIALLY SLIGHTLY DIFFERENT WAVELENGTH OF LIGHT
How do the reaction centers of photosystem I and II differ?
PHOTON
A packet of light energy is called a
All of the above
When a pigment molecule absorbs a photon, one of its electrons
PASS ENERGY TO THE REACTION CENTER
Antenna molecules
PHOTONS
The energy that excites P680 and P700 is supplied by
SHUTTLE ELECTRONS ALONG IN A SERIES OF REDOX REACTIONS
The electron transport chains of the light reactions
; NADP+ IS REDUCED TO NADP
As a result of the cascade of electrons down the electron transport chains of the light reactions,
PHOTOSYSTEM II
The electrons lost from the reaction center of photosystem I are replaced by electrons from
H2O
The electrons lost from the reaction center of photosystem II are replaced by electrons from
PASSES ELECTRONS TO PHOTOSYSTEM I
Photosystem II
THE FINAL ELECTRON ACCEPTOR IS NADP+
Photosynthetic chemiosmosis differs from respiratory chemiosmosis in that
H+ . . . STROMA . . . H+
In chemiosmosis, energy from electron flow is used to transport ___ from the ___ to the thylakoid compartment, generating a concentration gradient of ___.
IT TRANSPORTS H+S FROM THE THYLAKOID COMPARTMENT TO THE STROMA
Which one of the following is not a characteristic of the chloroplast ATP synthase?
IS ANALOGOUS TO THE PRODUCTION OF ATP IN MITOCHONDRIA
In photosynthesis, the chemiosmotic production of ATP
CARBON DIOXIDE
Photosynthetic organisms derive their carbon from
SIX
To produce one glucose molecule, the Calvin cycle needs to be run through ___ time(s).
PLAY A ROLE IN GLUCOSE SYNTHESIS BY PLANTS
ATP and NADPH
rich molecule that a plant cell can then use to make glucose or other organic molecules. ;G3P
The Calvin cycle constructs ___, an energy
THE INCORPORATION OF O2 INSTEAD OF CO2 BY RUBISCO, YIELDING A TWO;CARBON COMPOUND THAT IS BROKEN DOWN TO CO2 AND H2O
What is photorespiration?
THEY HELP THE PLANT BOTH CONSERVE WATER AND SYNTHESIZE GLUCOSE EFFICIENTLY UNDER HOT, DRY CONDITIONS
What is the main advantage of the C4 and CAM photosynthesis strategies over the C3 strategy?
YES, TO SUPPLY THE PLANT WITH THE ATP NEEDED TO POWER VARIOUS CELL ACTIVITIES
Do photosynthesizing plants have mitochondria?
CORN, C3
Which of the following choices incorrectly pairs a crop plant with the photosynthetic strategy it uses?
IS DETRIMENTAL TO THE PLANT SINCE IT BREAKS DOWN RUBISCO
Photorespiration
COUNTERACTED BY PHOTOSYNTHESIS, WHICH REMOVES CARBON DIOXIDE FROM THE ATMOSPHERE
The greenhouse effect is
All of the above
The greenhouse effect is
growth forests and replacing them with plantations of young trees would help to alleviate the threat of global greenhouse warming. What important fact does this argument ignore? ;MOST OF THE BIOMASS OF THE CUT TREES WOULD BE ADDED TO THE ATMOSPHERE AS CO2 WITHIN A FEW YEARS
It has been argued that cutting old
THREE
Ozone consists of ___ oxygen atom(s).
PROTECTS EARTH FROM UV RADIATION
Ozone
A SIGNIFICANT LOSS IN THE AMOUNT OF NITROGEN AND PHOSPHORUS IN THE SOIL
A small oak seedling weighing less than 6 ounces is planted in a pot that contains 150 pounds of soil. Approx 1 lb of nitrogen and phosphorus fertilizer is added to the soil. For 2 yrs, the plant is given plenty of water and light. At the end of the experiment, the plant weighs nearly 25 lbs. you would expect
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