UA BSC 108 EXAM 2 (TWO VERSIONS) ACTUAL EXAM W
p p p p p p p p p
ITH VERIFIED QUESTIONS AND CORRECT ANSWERS| GU
p p p p p p
ARANTEED SUCCESS| ACE YOUR GRADES. p p p p
VERSION 1 p
What is a photosynthetic autotroph? - Correct Answer-
p p p p p p p
An organism that makes its own food from inorganic ingredients.
p p p p p p p p p
What is the fluid inside chloroplasts called? - Correct Answer-Stroma
p p p p p p p p p
What are the membranes inside chloroplasts called? - Correct Answer-
p p p p p p p p p
inner and outer membranes
p p p
Write the overall equation for photosynthesis. - Correct Answer-
p p p p p p p p
6CO2+6H2O→C6H12O6+6O2
p
,What is the primary function of pigments in photosynthesis? Name the primary pig
p p p p p p p p p p p p
ment used in photosynthesis. - Correct Answer-
p p p p p p
Pigments absorb certain wavelengths. They are the means by which the energy of s
p p p p p p p p p p p p p
unlight is captured for photosynthesis. The primary pigment used in photosynthesi
p p p p p p p p p p
s is Chlorophylla-a.
p p
Why are leaves green? - Correct Answer-
p p p p p p
Their green color is from chlorophyll, a pigment (light-
p p p p p p p p
absorbing molecule) in the chloroplasts that plays a central role in converting solar
p p p p p p p p p p p p p p
energy to chemical energy. p p p
How and where does water enter a plant? - Correct Answer-
p p p p p p p p p p
Water enters root hair cells by osmosis.
p p p p p p
How and where does carbon dioxide enter a plant? - Correct Answer-
p p p p p p p p p p p
Carbon Dioxide diffuses through small holes in the underside of leaves, called the
p p p p p p p p p p p p p
stomata.
The light reactions take place in three stages. Name the stages and summarize the e
p p p p p p p p p p p p p p
vents of each stage. 1. Photons excite electrons in the chlorophyll of the first photo
p p p p p p p p p p p p p p
system. These photons are then trapped by the primary electron acceptor.
p p p p p p p p p p
,This photosystem then replaces the lost electrons by extracting new ones from wat
p p p p p p p p p p p p
er. This is the step that releases O2 during photosynthesis. 2. Energized electrons fr
p p p p p p p p p p p p p
om the first photosystem pass down an electron transport chain to the second phot
p p p p p p p p p p p p p
osystem. The chloroplast uses the energy released by this electron "fall" to make A
p p p p p p p p p p p p p
TP. 3. The second photosystem transfers its light-
p p p p p p p
excited electrons to NADP+, reducing it to NADPH.
p p p p p p p
List all products of the light reactions. carbon dioxide, water. Glucose, oxygen
p p p p p p p p p p p
The Calvin cycle has three main stages. Name the stages and summarize the events
p p p p p p p p p p p p p
of each stage. - Correct Answer-"1) Carbon Fixation-
p p p p p p p p
The enzyme rubisco combines CO2 with 5-
p p p p p p p
carbon sugar rubulose biphosphate (RuBP). The unstable product formed splits int
p p p p p p p p p p
o 2 molecules of 3-carbon 3-phosphoglyceric acid (3- PGA).
p p p p p p p p
2) Reduction-
Energy from 6 molecules of ATP is used to oxidize NADPH to NADP+. Six molecules
p p p p p p p p p p p p p p p p
of 3-PGA are reduced, producing six molecules of energy-rich 3- carbon sugar G3P.
p p p p p p p p p p p p
3) Release of one molecule of G3P- p p p p p
Five of the previously created G3Ps remain in the cycle, but one molecule is relea
p p p p p p p p p p p p p p p
sed.
4) Regeneration of RuBP - p p p
series of chemical reactions uses energy from ATP to rearrange the atoms of th
p p p p p p p p p p p p p p
e 5 G3P molecules, (15 total carbons), which forms 3 RuBP molecules (15 total c
p p p p p p p p p p p p p p
arbons).
These will start another turn of the cycle.
p p p p p p p
, "
List all products in the Calvin cycle. - Correct Answer-
p p p p p p p p p
"6 Turns of the Calvin Cycle→ 1 C₆H₁₂O₆
p p p p p p p
6CO₂ → 1 C₆H₁₂O₆ p p p
18 ATP + 12 NADPH → 1 C₆H₁₂O₆
p p p p p p p
Left over ATP is used elsewhere by the cell. "
p p p p p p p p p
Give two examples of plants that use C4 photosynthesis. - Correct Answer-"1) Corn
p p p p p p p p p p p p
2) Sugarcane"
p
What environmental factor is C4 photosynthesis an adaptation for? -
p p p p p p p p p
Correct Answer-High levels of CO2 and drought environments
p p p p p p p p
Contrast carbon fixation in C4 and CAM plants. C4 plants initially attach CO2toPEP t
p p p p p p p p p p p p p
o form the four-
p p p
carbon compound OAA using the enzyme PEP carboxylase. This takes place in the l
p p p p p p p p p p p p p
oosely packed cells called mesophyll cells. OAA is then pumped to another set of ce
p p p p p p p p p p p p p p
lls, the bundle sheath cells, which surround the leaf vein.
p p p p p p p p p
p p p p p p p p p
ITH VERIFIED QUESTIONS AND CORRECT ANSWERS| GU
p p p p p p
ARANTEED SUCCESS| ACE YOUR GRADES. p p p p
VERSION 1 p
What is a photosynthetic autotroph? - Correct Answer-
p p p p p p p
An organism that makes its own food from inorganic ingredients.
p p p p p p p p p
What is the fluid inside chloroplasts called? - Correct Answer-Stroma
p p p p p p p p p
What are the membranes inside chloroplasts called? - Correct Answer-
p p p p p p p p p
inner and outer membranes
p p p
Write the overall equation for photosynthesis. - Correct Answer-
p p p p p p p p
6CO2+6H2O→C6H12O6+6O2
p
,What is the primary function of pigments in photosynthesis? Name the primary pig
p p p p p p p p p p p p
ment used in photosynthesis. - Correct Answer-
p p p p p p
Pigments absorb certain wavelengths. They are the means by which the energy of s
p p p p p p p p p p p p p
unlight is captured for photosynthesis. The primary pigment used in photosynthesi
p p p p p p p p p p
s is Chlorophylla-a.
p p
Why are leaves green? - Correct Answer-
p p p p p p
Their green color is from chlorophyll, a pigment (light-
p p p p p p p p
absorbing molecule) in the chloroplasts that plays a central role in converting solar
p p p p p p p p p p p p p p
energy to chemical energy. p p p
How and where does water enter a plant? - Correct Answer-
p p p p p p p p p p
Water enters root hair cells by osmosis.
p p p p p p
How and where does carbon dioxide enter a plant? - Correct Answer-
p p p p p p p p p p p
Carbon Dioxide diffuses through small holes in the underside of leaves, called the
p p p p p p p p p p p p p
stomata.
The light reactions take place in three stages. Name the stages and summarize the e
p p p p p p p p p p p p p p
vents of each stage. 1. Photons excite electrons in the chlorophyll of the first photo
p p p p p p p p p p p p p p
system. These photons are then trapped by the primary electron acceptor.
p p p p p p p p p p
,This photosystem then replaces the lost electrons by extracting new ones from wat
p p p p p p p p p p p p
er. This is the step that releases O2 during photosynthesis. 2. Energized electrons fr
p p p p p p p p p p p p p
om the first photosystem pass down an electron transport chain to the second phot
p p p p p p p p p p p p p
osystem. The chloroplast uses the energy released by this electron "fall" to make A
p p p p p p p p p p p p p
TP. 3. The second photosystem transfers its light-
p p p p p p p
excited electrons to NADP+, reducing it to NADPH.
p p p p p p p
List all products of the light reactions. carbon dioxide, water. Glucose, oxygen
p p p p p p p p p p p
The Calvin cycle has three main stages. Name the stages and summarize the events
p p p p p p p p p p p p p
of each stage. - Correct Answer-"1) Carbon Fixation-
p p p p p p p p
The enzyme rubisco combines CO2 with 5-
p p p p p p p
carbon sugar rubulose biphosphate (RuBP). The unstable product formed splits int
p p p p p p p p p p
o 2 molecules of 3-carbon 3-phosphoglyceric acid (3- PGA).
p p p p p p p p
2) Reduction-
Energy from 6 molecules of ATP is used to oxidize NADPH to NADP+. Six molecules
p p p p p p p p p p p p p p p p
of 3-PGA are reduced, producing six molecules of energy-rich 3- carbon sugar G3P.
p p p p p p p p p p p p
3) Release of one molecule of G3P- p p p p p
Five of the previously created G3Ps remain in the cycle, but one molecule is relea
p p p p p p p p p p p p p p p
sed.
4) Regeneration of RuBP - p p p
series of chemical reactions uses energy from ATP to rearrange the atoms of th
p p p p p p p p p p p p p p
e 5 G3P molecules, (15 total carbons), which forms 3 RuBP molecules (15 total c
p p p p p p p p p p p p p p
arbons).
These will start another turn of the cycle.
p p p p p p p
, "
List all products in the Calvin cycle. - Correct Answer-
p p p p p p p p p
"6 Turns of the Calvin Cycle→ 1 C₆H₁₂O₆
p p p p p p p
6CO₂ → 1 C₆H₁₂O₆ p p p
18 ATP + 12 NADPH → 1 C₆H₁₂O₆
p p p p p p p
Left over ATP is used elsewhere by the cell. "
p p p p p p p p p
Give two examples of plants that use C4 photosynthesis. - Correct Answer-"1) Corn
p p p p p p p p p p p p
2) Sugarcane"
p
What environmental factor is C4 photosynthesis an adaptation for? -
p p p p p p p p p
Correct Answer-High levels of CO2 and drought environments
p p p p p p p p
Contrast carbon fixation in C4 and CAM plants. C4 plants initially attach CO2toPEP t
p p p p p p p p p p p p p
o form the four-
p p p
carbon compound OAA using the enzyme PEP carboxylase. This takes place in the l
p p p p p p p p p p p p p
oosely packed cells called mesophyll cells. OAA is then pumped to another set of ce
p p p p p p p p p p p p p p
lls, the bundle sheath cells, which surround the leaf vein.
p p p p p p p p p
