Biology 121 Exam #3 Quizzes Questions With Complete
Solutions
A photon of light energy of 850 nm strikes a leaf.Which of
following is true?
Select one:
a.The photon could be reflected
b.The energy of the photon would be less that the energy of
purple light
c.The wavelength of the photon would be greater that the
wavelength of purple light
d.if a photon is absorbed, some of the absorbed energy would be
given off as heat
e.This photon would not lead to ATP formation
f.This photon would not lead to NADPH formation
g.All of these answers are true
h. none of these answers are true Correct Answers g. All of
these answers are true
A photon of violet light
Select one:
a. has a long wavelength (toward end of visible range) and lower
energy
b. has a short wavelength and lower energy (compared with
other visible wavelengths)
c. has more energy than a wavelength of red light energy
d. is part of the infared (beyond red) portion of the
electromagnetic spectrum
e. is NOT absorbed by chlorophyll a (Hint: check absorption
spectra)
,f. a and d
g. b and e
h. None of the above Correct Answers c. has more energy than
a wavelength of red light energy
A soil's cation exchange capacity can
Select one:
a. reduce leaching of cations from soil during a heavy rain
b. release cations into the soil solution that are then available for
plants to absorb
c. be affected by factors like pH (also soil type, organic matter
etc.)
d. all of the above Correct Answers d. all of the above
a vector that has 25 genes, mostly for creating a pili Correct
Answers F plasmid
An example of a macronutrient and its correct function would be
Select one:
a. S, important component of many proteins
b. Mn, important component of chlorophyll
c. Calcium, major component of the phospholipid membrane
d. Potassium, major component of nucleic acids
e. Cl, required for water-splitting step in photosynthesis
f. Zinc, cofactor for some enzymes Correct Answers a. S,
important component of many proteins
An example of a micronutrient would be
Select one:
a. Ca
b. N
, c. Fe
d. K
e. Mg
f. P
g. S Correct Answers c. Fe
Based on a U-tube (study guide, Fig 7.11), which of the
following would be true about a U-tube filled with pure water at
equilibrium (on both sides of membrane) and with no applied
pressure.
Select one:
a. it would have a solute component of +0.5 and a pressure
component of -0.5 for a total potential of 1.0 MPa
b. The solute component would be zero. The pressure
component would be zero and the total water potential would be
zero
c. The total water potential would equal the solute component
minus the pressure component
d. Water would move from the left hand side of the U-tube
across the semi-permeable membrane until the difference in
height between the two sides of the U-tube equaled the
difference in concentration Correct Answers b. The solute
component would be zero. The pressure component would be
zero and the total water potential would be zero
Based on a U-tube (study guide, Fig. 7.11) filled on both sides
with pure water at equilibrium, what happens if you add a solute
to the right side of the U-tube?
Select one:
a. All life as we know it will stop instantaneously and every
molecule in your body will explode at the speed of light
Solutions
A photon of light energy of 850 nm strikes a leaf.Which of
following is true?
Select one:
a.The photon could be reflected
b.The energy of the photon would be less that the energy of
purple light
c.The wavelength of the photon would be greater that the
wavelength of purple light
d.if a photon is absorbed, some of the absorbed energy would be
given off as heat
e.This photon would not lead to ATP formation
f.This photon would not lead to NADPH formation
g.All of these answers are true
h. none of these answers are true Correct Answers g. All of
these answers are true
A photon of violet light
Select one:
a. has a long wavelength (toward end of visible range) and lower
energy
b. has a short wavelength and lower energy (compared with
other visible wavelengths)
c. has more energy than a wavelength of red light energy
d. is part of the infared (beyond red) portion of the
electromagnetic spectrum
e. is NOT absorbed by chlorophyll a (Hint: check absorption
spectra)
,f. a and d
g. b and e
h. None of the above Correct Answers c. has more energy than
a wavelength of red light energy
A soil's cation exchange capacity can
Select one:
a. reduce leaching of cations from soil during a heavy rain
b. release cations into the soil solution that are then available for
plants to absorb
c. be affected by factors like pH (also soil type, organic matter
etc.)
d. all of the above Correct Answers d. all of the above
a vector that has 25 genes, mostly for creating a pili Correct
Answers F plasmid
An example of a macronutrient and its correct function would be
Select one:
a. S, important component of many proteins
b. Mn, important component of chlorophyll
c. Calcium, major component of the phospholipid membrane
d. Potassium, major component of nucleic acids
e. Cl, required for water-splitting step in photosynthesis
f. Zinc, cofactor for some enzymes Correct Answers a. S,
important component of many proteins
An example of a micronutrient would be
Select one:
a. Ca
b. N
, c. Fe
d. K
e. Mg
f. P
g. S Correct Answers c. Fe
Based on a U-tube (study guide, Fig 7.11), which of the
following would be true about a U-tube filled with pure water at
equilibrium (on both sides of membrane) and with no applied
pressure.
Select one:
a. it would have a solute component of +0.5 and a pressure
component of -0.5 for a total potential of 1.0 MPa
b. The solute component would be zero. The pressure
component would be zero and the total water potential would be
zero
c. The total water potential would equal the solute component
minus the pressure component
d. Water would move from the left hand side of the U-tube
across the semi-permeable membrane until the difference in
height between the two sides of the U-tube equaled the
difference in concentration Correct Answers b. The solute
component would be zero. The pressure component would be
zero and the total water potential would be zero
Based on a U-tube (study guide, Fig. 7.11) filled on both sides
with pure water at equilibrium, what happens if you add a solute
to the right side of the U-tube?
Select one:
a. All life as we know it will stop instantaneously and every
molecule in your body will explode at the speed of light
