WorksheetsBiol 3490, Midterm II, March 26, 2024
Total questions: 42
Worksheet time: 31mins
Which of the following regulates rubisco activity?
Stroma pH
Stroma Mg2+ concentration
CO2
All of the above
None of the above
Which of the following crops is not a C4 plant?
Corn
Soybean
Sugarcane
Switchgrass
Which of the following is the main translocated sugar in phloem?
Amylose
Fructose
Ribose
Sucrose
Starch
Which protein coats and protects the T-DNA?
Vir A
Vir B
Vir C
Vir D2
Vir E2
For the wood you buy from a Lowe’s store, the majority of the structure is?
Secondary phloem
Primary phloem
Secondary xylem
Primary xylem
Which protein is covalently attached at 5’ end of the T-DNA after the T-DNA is cut?
Vir A2
Vir B2
Vir C2
Vir D2
Vir E2
Which of the following is a “sink” in the situation of sugar translocation?
Developing fruits
Immature leaves.
Roots.
Seeds.
All of the above
Which of the following is a “source” in the situation of sugar translocation?
Developing fruits
Immature leaves.
Roots.
Seeds.
Mature leaves
Which of the following plants have the lowest CO2 compensation point?
C2
C3
C4
C5
CAM
Which of the following plants have the highest CO2 compensation point?
C2
C3
C4
C5
CAM
Which organelle is not involved in the C2 oxidative photosynthetic cycle?
Peroxisome
Mitochondrion
Chloroplast
ER
Which of the following plants is a CAM plant?
Arabidopsis
Rice
Wheat
Cactus
Maize
Which of the following statement is true?
In low latitude, such as Austin, TX, CAM plants have higher rates of photosynthetic carbon gain than C3 plants
In low latitude, such as Austin, TX, CAM plants have higher rates of photosynthetic carbon gain than C4 plants
In low latitude, such as Austin, TX, C4 plants have higher rates of photosynthetic carbon gain than C3 plants
In low latitude, such as Austin, TX, C3 plants have higher rates of photosynthetic carbon gain than C4 plants
In low latitude, such as Austin, TX, C3 plants have higher rates of photosynthetic carbon gain than CAM plants
Which of the following statements is not true?
The Calvin cycle in the photosynthesis requires light.
The Calvin cycle in the photosynthesis does not require light.
The Calvin cycle in the photosynthesis requires the products of the light reaction.
Both the dark and light reactions occur in the chloroplast.
Which of the following statements is true?
The Calvin cycle in the photosynthesis requires light.
The Calvin cycle in the photosynthesis does not require light.
The Calvin cycle in the photosynthesis requires the products of the light reaction.
Both the dark and light reactions occur in the chloroplast.
Which of the following is not a major limiting factor in the determining the rate of the photosynthesis in plants?
Rubisco activity
Regeneration of RuBP
Production of 3-phosphoglycerate (3-PGA)
Metabolism of the triose phosphates
None of the above
Which of the following is a major limiting factor in the determining the rate of the photosynthesis in plants?
Rubisco activity
Regeneration of RuBP
Production of 3-phosphoglycerate (3-PGA)
Metabolism of the triose phosphates
None of the above
Sucrose is made from two monosaccharides. Which of the followings are substrates in sucrose synthesis?
RuBP
Fructose 6-phosphate
Ribose
UDP-glucose
The regeneration process in the Calvin cycle involves conversion of sugars with different numbers of carbon. Which of the following is not a sugar molecule during the regeneration?
an eight-carbon sugar
a seven-carbon sugar
a six-carbon sugar
a five-carbon sugar
a four-carbon sugar
Which of the following crops is not a C3 plant?
Soybean
Sorghum
Rice
Wheat
Barley
Which of the following statement is not true?
In high CO₂ environment, C₃ plants usually perform better than C₄ in terms of net photosynthetic CO₂ assimilation
In high CO₂ environment, net photosynthetic CO₂ assimilation of C₄ plants is similar to C₃ plants
In lower latitude (e.g. 25°), C₄ plants have higher carbon gain.
In ambient CO₂ environment, C₃ plants in general does not perform as good as C₄ in terms of net photosynthetic CO₂ assimilation.
In high latitude (e.g. 60°), C₃ plants have higher carbon gain.
Which of the following statement is true?
In high CO₂ environment, C₃ plants usually perform better than C₄ in terms of net photosynthetic CO₂ assimilation
In high CO₂ environment, net photosynthetic CO₂ assimilation of C₄ plants is similar to C₃ plants
In lower latitude (e.g. 25°), C₄ plants have higher carbon gain.
In ambient CO₂ environment, C₃ plants in general does not perform as good as C₄ in terms of net photosynthetic CO₂ assimilation.
In high latitude (e.g. 60°), C₃ plants have higher carbon gain.
Which of the following is not a rule for source-to-sink translation when photosynthates are translocated from source to sink in plants?
Development
Flowering
Proximity
Vascular connections
Which of the following is not a stage during Arabidopsis embryogenesis?
Globular stage
Transition stage
Oval stage
Heart Stage
Walking stick stage
To fix 48 moles 14CO2 molecules, how many moles of ATP are required?
48
74
96
144
4320
To fix 48 moles 14CO2 molecules, how much energy of NADPH in the unit of KJ it required?
96
144
14,800
19,200
22,200
To fix 48 moles 14CO2 molecules, how much total energy in the unit of KJ is required?
14,800
18,130
19,200
22,200
23,520
If light intensity is not a limiting factor (e.g. at 1000 μmol m -2 s -1 irradiance), which of the following has the highest photosynthetic CO2 assimilation?
Forest canopy
Individual leaf
Individual needle
Shoot
Stem
If light intensity is not a limiting factor (e.g. at 1000 μmol m -2 s -1 irradiance), which of the following has the lowest photosynthetic CO2 assimilation?
Forest canopy
Individual needle
Shoot
Which of the following is unlikely found in the composition of the phloem sap?
Sucrose
Amino acids
Fe
Protein
Which of the following is not a disaccharide?
Amylopectin
Maltose
Lactose
Sucrose
Which of the following is a disaccharide?
Amylopectin
Maltose
Lactose
Sucrose
Which of the following is a monosaccharide?
Amylopectin
Glucose
Lactose
Sucrose
Fructose
Why ga1, ga2 and ga3 mutants have a stronger phenotype (shorter) than ga4 and ga5?
Because ga1, ga2 and ga3 mutants were found earlier than ga4 and ga5.
Because ga1, ga2 and ga3 mutants affects reactions upstream of ga4 and ga5.
Because ga1, ga2 and ga3 mutants were not lethal.
Because ga4 and ga5 only block part of the GA biosynthetic pathway
Because ga1, ga2 and ga3 mutants affects reactions upstream of ga4 and ga5, and because ga4 and ga5 only block part of the GA biosynthetic pathway
28. The C4 plants have evolved a mechanism with two distinctive photosynthetic cell types: __________________________ and __________________________
internal ring of bundle sheath cells and outer ring of mesophyll cells
internal ring of mesophyll cells and outer ring of palisade cells
internal ring epidermal cells and external ring spongy mesophyll cells
guard cells and external ringparenchyma cells
Mesophyll cells export _____ as a CO2 transport system to the Calvin cycle in _____
malate, bundle sheath cells
malate, mitochondrion
fructose, bundle sheath cells
fructose, ER
CAM stands for:
Crassulacean Acid Metabolism
Carbon Assimilation Mechanism
Chlorophyll Activation Method
Cellular ATP Metabolism
29. How do leaves dissipate excess light energy/heat?
Use the xanthophyll cycle to dissipate excess light energy in leaves that involves carotenoids.
Chloroplasts move to plasma membrane to avoid damage from high light.
Leaf changes its orientation relative to the incoming sunlight.
Leaf Olympics
What type of glycosidic bond is shown in the diagram?
α-1,4
β-1,4
α-1,6
β-1,6
For the CAM cycle, CO2 uptake from air takes place ______ when stomata are _______
at night, open
during day, closed
during day, open
at night, close
For the CAM cycle, refixation of the internally released CO2 occurs _____ when stomata are _____, to minimize loss of water
at night, open
at night, close
during day, open
during day, closed
Vir D2 and Vir E2 have ___ and ___ rich domains that instruct the plant cell to transport the T-DNA/VirD2/VirE2 complex into the nucleus
lysine and arginine
lysine and manganese
proline and arginine
isoleucine and arginine
