STUDY GUIDE
THESE ARE SAMPLE QUESTIONS TO HELPYOU FOR REVIEW, NOT THE QUESTIONS
ON THE FIRST EXAM.
CHECK YOU ANSWERS. IF YOU DO NOT AGREE WITH THE KEY,THERE MAY BE
AN ERROR WITH THE KEY.
Part I. Match the characteristics listed on the left to the
correct plant 'group' on the right. (use
only one answer)
A. C3 plants
____1. Utilizes mainly the RuBP
carboxylating enzyme to
B. C4 plants
fix carbon dioxide
____2. Well developed bundle sheath cells present C. CAM plants
____3. Plants that have a high affinity for
CO
2
D. A, B, and C
____4. Plants which evolved primarily
in the tropics
____5. Contains photosystems I and II to form ATP and NADPH+H (reducing power)
____6. Contains both carboxylating systems; however, one works during the day and the other at night.
____7. Contains both carboxylating systems; however,
one works in mesophyll cells and the other in bundle sheath cells.
Match the correct hormone on the right to its effect on plants listed on the left.
____8. hastens fruit ripening
A. auxins
B. ethylene
____9. synthesized in stem tip and causes cell
elongation
C. gibberellins
D. abscisic acid
E. ethylene
____10. prevents abscission of leaves
F. cytokinins
____11. stimulates abscission of leaves
___12. inhibits growth, causes seed dormancy
____13. stimulates flowering in long day plants
and biennials
____14. used during tropisms (gravitropism
or phototropism)
____15. induces adventitious roots to form on cuttings
____16. stimulates the closing of the stomata in some plants
____17. delays senescence in leaves removed from the
plants
Choose the correct response from the list below the statement or question.
____18. Which of the following actions does not occur during the stimulation of germination by gibberellin in barley seeds.
a) gibberellin
is synthesized in the embryo
b) gibberellin
is activated in the endosperm were it stimulates the synthesis of hydrolytic
enzymes
c) hydrolytic
enzymes move from aleurone layer to endosperm and breaks down starch and
protein
d) gibberellin
moves to the aleuerone layer and stimulates the synthesis of hydrolytic
enzymes
____19. Which of the following is not part of a basic medium used for plant tissue culture.
a) carbon souce
- glucose
b) minerals
- Hoaglands solution
c) auxins
d) abscisic
acid
e) cytokinins
____20. Which of the following is not true concerning root pressure.
a) this is a
physical process
b) water move
into the xylem tissue via apoplastic and symplastic forces
c) water is
pulled up the xylem tissue by transpirational pull
d) water potential
of xylem must become more negative
____21. Perception of gravity in plants involves:
a) the sedimentation
of the hormone IAA
b) the sedimentation
of statoliths (amyloplasts)
c) sensitive
root hairs located at end of the root
d) gravity can
not be perceived by plants
____22. Which of the following conditions will stimulate a short day plant (SDP) to flower?
a) Place the plant under a sixteen hour light eight hour dark cycle.
b) Place the plant under a sixteen hour light eight hour dark cycle and
interupt the light period with 10 minutes of dark..
c) Place the plant under an eight hour light eight hour dark cycle.
d) Place the plant under an eight hour light sixteen hour dark cycle and
interupt the light period with 10 minutes of light.
e) Place the plant under an eight hour light sixteen hour dark
cycle.
____23. Perception of light for photoperiodic response occurs in the:
a) stem
c) leaves
b) root
d) stem apex
____24. The pigment in plants which can be used
to detect day length
is:
a) chlorophyll
a
d) phytochrome
b) chlorophyll
b
e) anthocyanin
c) phycobillin
____25. Translocation of photosynthates occurs in the:
a) cortex
d) xylem
b) pith
e) phloem
c) vessel elements
____26. Which of the following concerning the photoperiodic response in plants is true.
a) The length
of light during the 24 day cycle determines the response.
b) The length
of dark during the 24 day cycle determines the response.
c) The intensity
of light determines the response.
d) Light with
large amounts of blue light determines the response.
____27. Which of the following events involving the movement
of
of solutes and
solvents through a plant is "active".
a) movement of
water from soil through root corex
b) movement
of sucrose from one sieve cell to the next
c) movement
of water through the xylem vessel
d) phloem loading
of sucrose from bundle cell into
sieve cell across membrane
e) evaporation
of water from leaves
____28. Which of the following can be explained by vernalization.
a) exposing
plants to short dark periods to get them to flower
b) exposing
seeds to GA to get them to germinate
c) exposing
fruits to light to get them to ripen
d) exposing
roots to dark periods to get them to grow down
e) exposing
buds to periods of cold to get them to flower
____ 29. Which of the following statements concerning gravitropism
is NOT true.
a) Roots show positive gravitropism response.
b) Shoots of a plant grow up because of a gravitropism
response.
c) Cells detect gravity because of starch grains
(statoliths) sink to the
bottom of the cells.
d) A germinating seed placed 2 inches under the
soil will
grow upward searching for
sunlight.
30- 34 Match from the list below that term
which applies to the following natural responses by a
plant.
a) photoperiodism
d) gravitropism (geotropism)
b) abscission
e) leaf yellowing - senescence
c) phototropism
30. The bending of a plant towards a unilateral light
(light coming from one direction).
31. Chrysanthemums and tobacco only flower during
short days
32. During the fall the leaves of deciduous plants
stop producing auxin which stimulates the leaves to weaken
at a specific place on the petiole and fall off
33. Placing a plant on its side will cause
the stem to bend and grow upward
34. Placing leaf in kinetin prevents this process
35. Identify the concept where pollination and fertilization
is prevented and the ovary is stimulated to develop into
a fruit.
a) parthenocarpy
c) abscission
b) senescence
d) apical dominance
____36. Apoplastic movement of water through the root includes:
a) via plasmademata
from protoplast to protoplast
b) via lateral
vessel elements
c) root channels
d) via cell
walls
____37. Which of the following is not part of the pressure
flow
mechanism used to explain photosynthate trnsport?
a) phloem loading
b) source/sink
c) turgor pressure
developed osmotically
d) transpirational
pull
e) assimilate
stream through the phloem
____38. Root pressure is responsible for:
a) movement of
water up a 20 foot tree
b) forcing open
the guard cells during the day
c) guttation
d) movement
of glucose from source to sink
____39. Perception of gravity in plants involves:
a) the sedimentation
of the hormone IAA
b) the sedimentation
of statoliths (amyloplasts)
c) sensitive
root hairs located at end of the root
d) gravity can
not be perceived by plants
____40. Long day plants will not flower if placed in a
24 hr/day light
cycle
(continuous light).
a) true b) false
____41. Perception of light for photoperiodic response occurs in the:
a) stem
c) leaves
b) root
d) stem apex
____42. The pigment in plants which can be used
to detect day length
is:
a) chlorophyll
a
d) phytochrome
b) chlorophyll
b
e) anthocyanin
c) phycobillin
____43. Translocation of photosynthates occurs in the:
a) cortex
d) xylem
b) pith
e) phloem
c) vessel elements
____44. The length of day light causes the photoperiodic
response
in plants.
a) true b) false
____45. Which of the following events involving the movement
of
of solutes and
solvents through a plant is "active".
a) movement of
water from soil through root corex
b) movement
of sucrose from one sieve cell to the next
c) movement
of water through the xylem vessel
d) phloem loading
of sucrose from bundle cell into
sieve cell across membrane
e) evaporation
of water from leaves
____46. Which of the following can be explained by vernalization.
a) exposing
plants to short dark periods to get them to flower
b) exposing
seeds to GA to get them to germinate
c) exposing
fruits to light to get them to ripen
d) exposing
roots to dark periods to get them to grow down
e) exposing
buds to periods of cold to get them to flower
____ 47. Which of the following statements concerning photoperiodism is NOT true.
a) The pigment that detects light during the
process is phytochrome.
b) The response which is triggered is flowering
in plants.
c) Long?day plants will flower during the
spring.
d) Short?day plants will flower after being
exposed to a cold
period.
Part II. Explain the (1) results of the following experiments
and the (2) reason for the outcome.
Diagrams would be useful.
1. A young corn seedling is placed so that the shoot is positioned on its side.
results:
reason:
3. A bean plant (4 inches tall) is placed in unilateral light (light from one direction).
results:
reason:
4. A four week old spinach plant (long day plant) is placed under the following light/dark cycles:
Use the Pr/Pfr pigment model in your explanation (diagram
in the space below and refer back to the diagram in each part)
a. 8 hours of light followed by 16 hours of dark cycle:
response?
explanation?
b. 8 hours of dark followed by 16 hours of light cycle:
response?
explanation ?
c. 8 hours of light followed by 8 hours of dark cycle:
response?
explanation?
d. 8 hours of light followed by
16 hours of dark and having the
dark interrupted
by 5 minutes of white light
response?
explanation?
e. 8 hours of light followed
by 16 hours of dark and having the
dark interrupted by 5 minutes red light and five minutes of far red light
response?
explanation?
5. Light sensitive lettuce seeds are divided into three groups. All three groups have water added to stimulate germination and placed in the dark. After imbibition, before germination the seeds in group 1 are left in the dark, the seeds in group 2 are exposed to 10 minutes of red light and placed back in the dark, the seeds in group 3 are exposed to 10 minutes of red light followed by 5 minutes of far red light and placed back in the dark.
response?
explanation?
6. Leaf is removed from plant and placed in a vial containing water. The blade of the leaf is covered with ABA (abscisic acid)
results:
reason:
7. Tip of stem is excised and an agar block containing IAA is placed on the cut stem.
results:
reason:
Part III. Short Answer (10 pts)
Explain how photosynthates move through a plant. Diagrams
would
be useful. Use the appropriate terms listed in Part
III.
(5)
Explain how water and dissolved minerals move through a
plant.
Diagrams would be useful. Use appropriate terms listed
in Part III.
(5)