Quiz 7
Ch 7
Name________________________
Remote # ____________
4. Which of the following is a true
statement about photosynthesis?
a. In photosynthesis, inorganic
molecules such as carbon dioxide and
water react to produce organic, energyrich molecules such as glucose.
b. In photosynthesis, oxygen is used to
help break down glucose.
c. Photosynthesis is an exergonic
reaction.
d. Photosynthesis is a process that is
carried out primarily by autotrophic
prokaryotic bacteria.
1. In most land plants, photosynthesis
occurs in cells of the __________ of the
leaves, because these cells contain the
largest numbers of chloroplasts.a.
epidermis
b. stomata
c. cuticle
d. mesophyll
e. vascular bundles
2. Light energy is initially captured by
"photosystems" within thylakoid
membranes. Photosystems are
organized arrays of __________.
a. proteins
b. chlorophyll molecules
c. pigment molecules such as
carotenoids
d. all of the above
e. none of the above
5. Leaves include a number of structural
modifications for the purpose of
photosynthesis, including __________.
a. adjustable openings in the surface of
the leaf that permit the passage of
carbon dioxide, water, and oxygen
b. a waxy covering on the surface of the
leaf that is designed to reduce
evaporation
c. photosynthetic mitochondria
d. Both the first and second answers are
correct.
3. Why is carbon dioxide a key molecule
in the light-independent reactions of
photosynthesis?
a. Carbon dioxide provides electrons to
replace those lost by chlorophyll during
the light-dependent reactions.
b. Carbon dioxide, together with water,
is the raw material for the synthesis of
sugars, which are the key products of
the light-independent reactions.
c. Carbon dioxide inhibits the lightindependent reactions of
photosynthesis.
d. Carbon dioxide is the major product
of the light-independent reactions of
photosynthesis.
6. During photosynthesis, electrons are
continuously lost from the reaction
center of photosystem II. What source is
used to replace these electrons?
a. sunlight
b. oxygen
c. water
d. carbon dioxide
7. The term carbon fixation refers to
__________.
1
a. the loss of carbon during glucose
synthesis
b. the incorporation of atmospheric
carbon dioxide into a larger organic
molecule
c. the synthesis of glyceraldehyde-3phosphate
d. the regeneration of ribulose
bisphosphate
8. Photorespiration occurs when
__________.
a. oxygen is combined with ribulose
bisphosphate
b. carbon dioxide is combined with
ribulose bisphosphate
c. stomata are closed
d. Both the first and third answers are
correct.
9. In the light-dependent reactions of
photosynthesis the difference in
hydrogen ion concentration across the
thylakoid membrane is used to generate
__________.
a. NADPH
b. glucose
c. FADH2
d. ATP
e. oxygen
10. Which of the following represents
the products of the light-dependent
reactions of photosynthesis? For what
process are these products needed?
a. ATP and oxygen; photosystem I
b. NADPH and glucose; lightindependent reactions
c. carbon dioxide and water; CalvinBenson cycle
d. NADH and ADP; cellular respiration
e. NADPH and ATP; Calvin-Benson
cycle
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