BZ440 Plant Physiology Final Exam Preparation Guide EXAM Questions AND
Correct Answers
Can scientists predict with certainty where an inserted gene will go on a plant
chromosome in agrobacterium transformation? - ✔✔Genes are inserted on the
proper chromosome, but there is no control on where they go on the
chromosome- shot in the dark
How can transgene expression be controlled in genetically engineered plants? -
✔✔By selecting specific promoters that control the timing and location of gene
expression.
How do Bt crops and Roundup-ready crops differ? - ✔✔Bt crops are engineered
for insect resistance, while Roundup-ready crops are engineered to resist
herbicides.
How do hormones differ from enzymes in plants? - ✔✔Hormones are signaling
molecules consumed during reactions and transported over long distances,
while enzymes are catalysts that function within the same cell and are not
consumed.
How do photosynthetic pigments contribute to photosynthesis? - ✔✔They
absorb red light, which is essential for ATP production needed for the H+-
ATPase pump.
How do plants measure photoperiod? - ✔✔Plants measure the length of the
dark period (night) rather than the light period (day).
, How do plants respond to stress at the molecular level? - ✔✔Plants produce
signaling molecules such as hormones, which are perceived by receptors,
initiating signal cascades that modify protein activity and gene expression.
How does ABA affect stomatal closure? - ✔✔ABA accumulates in response to
osmotic stress, leading to stomatal closure.
How does auxin affect leaf and fruit abscission? - ✔✔Auxin delays leaf and fruit
abscission by making the abscission zone less sensitive to ethylene.
How does auxin affect root and shoot growth in gravitropism? - ✔✔Auxin
accumulation on the lower side inhibits cell elongation in the root while
inducing cell expansion in the shoot.
How does auxin-induced cell expansion occur? - ✔✔It is an example of a signal
cascade pathway that involves auxin's role in cell elongation.
How does far-red light affect flowering in LDP? - ✔✔Far-red light reverses the
effect of red light by converting Pfr back to Pr.
How does genetic engineering contribute to environmental cleanup? - ✔✔By
using plants to accumulate harmful substances from the environment, aiding in
remediation efforts.
How does red light affect flowering in LDP? - ✔✔In LDP, a flash of red light
during the dark period induces flowering by converting Pr to Pfr.
Correct Answers
Can scientists predict with certainty where an inserted gene will go on a plant
chromosome in agrobacterium transformation? - ✔✔Genes are inserted on the
proper chromosome, but there is no control on where they go on the
chromosome- shot in the dark
How can transgene expression be controlled in genetically engineered plants? -
✔✔By selecting specific promoters that control the timing and location of gene
expression.
How do Bt crops and Roundup-ready crops differ? - ✔✔Bt crops are engineered
for insect resistance, while Roundup-ready crops are engineered to resist
herbicides.
How do hormones differ from enzymes in plants? - ✔✔Hormones are signaling
molecules consumed during reactions and transported over long distances,
while enzymes are catalysts that function within the same cell and are not
consumed.
How do photosynthetic pigments contribute to photosynthesis? - ✔✔They
absorb red light, which is essential for ATP production needed for the H+-
ATPase pump.
How do plants measure photoperiod? - ✔✔Plants measure the length of the
dark period (night) rather than the light period (day).
, How do plants respond to stress at the molecular level? - ✔✔Plants produce
signaling molecules such as hormones, which are perceived by receptors,
initiating signal cascades that modify protein activity and gene expression.
How does ABA affect stomatal closure? - ✔✔ABA accumulates in response to
osmotic stress, leading to stomatal closure.
How does auxin affect leaf and fruit abscission? - ✔✔Auxin delays leaf and fruit
abscission by making the abscission zone less sensitive to ethylene.
How does auxin affect root and shoot growth in gravitropism? - ✔✔Auxin
accumulation on the lower side inhibits cell elongation in the root while
inducing cell expansion in the shoot.
How does auxin-induced cell expansion occur? - ✔✔It is an example of a signal
cascade pathway that involves auxin's role in cell elongation.
How does far-red light affect flowering in LDP? - ✔✔Far-red light reverses the
effect of red light by converting Pfr back to Pr.
How does genetic engineering contribute to environmental cleanup? - ✔✔By
using plants to accumulate harmful substances from the environment, aiding in
remediation efforts.
How does red light affect flowering in LDP? - ✔✔In LDP, a flash of red light
during the dark period induces flowering by converting Pr to Pfr.
