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PS 103 Test 2 questions and answers already solved 2024
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PS 103 Test 2 questions and answers already solved 2024
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PS 103 Test 2photosynthesis from plants is the fundamental source of food and energy for
all other complex life on Earth. - correct answer ✔True
The reaction for photosynthesis is as follows:C6H12O6 + 6 O2 ̄ ̄ ̄» 6CO2 +
6H2O + energy (ATP and heat) - correct answer ✔False
Many crop plants contain 80 to 95 percent water. - correct answer ✔True
Chlorophyll converts chemical energy into light energy. - correct answer
✔False
Carotenoids are one type of plant pigment. - correct answer ✔True
ATP and NADPH are produced in the carbon-fixation steps of photosynthesis.
- correct answer ✔False
The light reactions are the only part of photosynthesis that require light. -
correct answer ✔True
One of the functions of transpiration is uptake of mineral nutrients. - correct
answer ✔True
The Krebs cycle is part of photosynthesis. - correct answer ✔False
Water is absorbed from the soil by root hairs. - correct answer ✔True
,The rate of transpiration increases with higher temperatures. - correct answer
✔True
Leaf curling can be a sign of moisture stress. - correct answer ✔True
It is important to recognize crop development stages in order to apply sound
management practices. - correct answer ✔True
The Growing Degree Day base temperature for soybeans is 32 degrees F. -
correct answer ✔False
In which organelle does photosynthesis occur?
a.mitochondria
b.lamella
c.chloroplast
d.vacuole - correct answer ✔c.chloroplast
Plant pigments absorb visible light in this range:
a.200-300 nm
b.400-700 nm
c.700-1000 nm
d.1000-1300 nm - correct answer ✔b.400-700 nm
Plant pigments are least effective in absorbing which color of light?a.yellow
b.green
c.red
d.blue - correct answer ✔b.green
, The two energy compounds used in the carbon-fixation reactions are:
a.CO2and H2O
b.ATP and NADPH
c.PGA and ATP
d.C3 and RuBP - correct answer ✔b.ATP and NADPH
Which type of photosynthesis is inefficient above 25°C?
a.C3
b.C4
c.CAM
d.None of these answers is correct. - correct answer ✔a.C3
What percentage of the world's plants are C4?
a.10
b.40
c.80
d.95 - correct answer ✔a.10
Which type of cell controls the opening and closing of stomata?a.pericycle
b.cortex
c.mesophyll
d.guard - correct answer ✔d.guard
Rhizobia bacteria convert atmospheric nitrogen into:
a.NO2
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