BIO 212 exam 2 prep Questions and Answers Fully Solved Latest Version 2025-2026
Regenerated in the regeneration phase of the Calvin cycle.
A)ATP
B) Ribulose Bisphosphate (RuBP)
C) NADPH
D) Glyceraldehyde-3-phosphate (G3P)
E) O2 - Answers B) Ribulose Bisphosphate (RuBP)
Tension pulls water up a tree. Where is tension generated?
A) Roots
B) Phloem
C) Air spaces of leaves
D) Stomata
E) Throughout the plant - Answers Air spaces of leaves
Phototropism is regulated by auxins, which stimulate elongation of cells (Fig. 1). Increased cell
elongation predominantly occurs at:
A) The tip; close to the light source
B) The tip;oppositethe light source
C) The base;close to the light source
D) The base;opposite the light source - Answers D) The base;opposite the light source
The long-distance transport of photosynthate (sugars) occurs in the:
A) Xylem
B) Tracheid
C) Apoplast
D) Symplast
,E) Phloem - Answers E) Phloem
5) Why don't animal cells need cell walls?
A) There is no water in animal cells
B) Animal cells are isotonic with their extracellular environmenT
C) Animal cells are surrounded by a double lipid bilayer
D) Animal cells can increase cholesterol content to resist water pressure
E) The extracellular environment of animal tissues is low in water - Answers B) Animal cells are
isotonic with their extracellular environmenT
6) Which one of the molecules is oxidized by special chlorophyll P680* of PSII?
A) Pq
B) Pc
C) NADP+
D) H2O
E) ATP - Answers D) H2O
7) For plants, why is high soil salinity (salt stress) the same as drought stress?
A) High salinity lowers ퟁퟁS in the soil, reducing flow of H2O into plants
B) Salts bind abscisic acid receptors and accidently triggers the same response
C) High amount of free H2O in soil limits oxygen for roots
D) High salinity closes stomata and causes stress
E) High salinity reduces the rate of transpiration and causes stress - Answers A) High salinity
lowers ퟁퟁ S in the soil, reducing flow of H2O into plants
The cells located in the shaded ring (beneath cork cambium) of figure 2 are:
A ) Secondary xylem
B) Both secondary xylem and secondary phloem
C) Secondary phloem
D) Sieve-tube elements and phelloderm
, E) Guard cells - Answers A ) Secondary xylem
5 of 12 Figure 3. A tapped maple tree.10) To make maple syrup, you tap a spigot into a tree, 4 ft
above the ground (Fig. 3). If the tree adds 2 ft of primary growth each year, how far from the
ground will the spigot be after two years?
A) 2 ft
B) 4 ft
C) 6 ft
D) 8 ft
E) 16 ft - Answers B) 4 ft
11) The electrons in H2O are magically labeled red. After full completion of the light reaction
and the Calvin cycle, what type of molecule is red?
A) ATP
B) Chlorophyll in the light harvesting complexes
C) Rubisco
D) NADP+
E) G3P - Answers E) G3P
12) The oxygen in H2O is magically labeled blue. After full completion of the light reaction and
the Calvin cycle, what molecule is blue?
A) ATP
B) O2
C) CO2
D) Rubisco
E) G3P - Answers B) O2
13) Which one of the following is false regarding the cytoskeleton?
A) The cytoskeletal filaments are permanent
B) Of the three, microtubules have the largest diameter
C) Organelles are anchored to the cytoskeleton
Regenerated in the regeneration phase of the Calvin cycle.
A)ATP
B) Ribulose Bisphosphate (RuBP)
C) NADPH
D) Glyceraldehyde-3-phosphate (G3P)
E) O2 - Answers B) Ribulose Bisphosphate (RuBP)
Tension pulls water up a tree. Where is tension generated?
A) Roots
B) Phloem
C) Air spaces of leaves
D) Stomata
E) Throughout the plant - Answers Air spaces of leaves
Phototropism is regulated by auxins, which stimulate elongation of cells (Fig. 1). Increased cell
elongation predominantly occurs at:
A) The tip; close to the light source
B) The tip;oppositethe light source
C) The base;close to the light source
D) The base;opposite the light source - Answers D) The base;opposite the light source
The long-distance transport of photosynthate (sugars) occurs in the:
A) Xylem
B) Tracheid
C) Apoplast
D) Symplast
,E) Phloem - Answers E) Phloem
5) Why don't animal cells need cell walls?
A) There is no water in animal cells
B) Animal cells are isotonic with their extracellular environmenT
C) Animal cells are surrounded by a double lipid bilayer
D) Animal cells can increase cholesterol content to resist water pressure
E) The extracellular environment of animal tissues is low in water - Answers B) Animal cells are
isotonic with their extracellular environmenT
6) Which one of the molecules is oxidized by special chlorophyll P680* of PSII?
A) Pq
B) Pc
C) NADP+
D) H2O
E) ATP - Answers D) H2O
7) For plants, why is high soil salinity (salt stress) the same as drought stress?
A) High salinity lowers ퟁퟁS in the soil, reducing flow of H2O into plants
B) Salts bind abscisic acid receptors and accidently triggers the same response
C) High amount of free H2O in soil limits oxygen for roots
D) High salinity closes stomata and causes stress
E) High salinity reduces the rate of transpiration and causes stress - Answers A) High salinity
lowers ퟁퟁ S in the soil, reducing flow of H2O into plants
The cells located in the shaded ring (beneath cork cambium) of figure 2 are:
A ) Secondary xylem
B) Both secondary xylem and secondary phloem
C) Secondary phloem
D) Sieve-tube elements and phelloderm
, E) Guard cells - Answers A ) Secondary xylem
5 of 12 Figure 3. A tapped maple tree.10) To make maple syrup, you tap a spigot into a tree, 4 ft
above the ground (Fig. 3). If the tree adds 2 ft of primary growth each year, how far from the
ground will the spigot be after two years?
A) 2 ft
B) 4 ft
C) 6 ft
D) 8 ft
E) 16 ft - Answers B) 4 ft
11) The electrons in H2O are magically labeled red. After full completion of the light reaction
and the Calvin cycle, what type of molecule is red?
A) ATP
B) Chlorophyll in the light harvesting complexes
C) Rubisco
D) NADP+
E) G3P - Answers E) G3P
12) The oxygen in H2O is magically labeled blue. After full completion of the light reaction and
the Calvin cycle, what molecule is blue?
A) ATP
B) O2
C) CO2
D) Rubisco
E) G3P - Answers B) O2
13) Which one of the following is false regarding the cytoskeleton?
A) The cytoskeletal filaments are permanent
B) Of the three, microtubules have the largest diameter
C) Organelles are anchored to the cytoskeleton
