337349
A process that makes important difference between \({C_3}\) and \({C_4}\) plants is
1 Transpiration
2 Glycolysis
3 Photosynthesis
4 Photorespiration
Explanation:
Photorespiration is light-dependent process which occurs in \({C_3}\) plants. During this process uptake of \({O_2}\) and release of \(C{O_2}\) takes place which is an opposite process of photosynthesis. In \({C_4}\) plants photorespiration does not take place. It has kranz anatomy.
AIPMT - 2012
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337350
Why photorespiration is absent in \({C_4}\) plants?
1 Stomata closes when \({O_2}\) concentration is high
2 Stomata opens only when \(C{O_2}\) concentration is high
3 Intracellular \(C{O_2}\) concentration is high in bundle sheath and it ensures RuBisCO function as carboxylase
4 Intracellular \(C{O_2}\) concentration is high in bundle sheath and it ensures RuBisCO function as oxygenase
Explanation:
In \({C_4}\) plants photorespiration does not occur. This is because they have a mechanism that increases the concentration of \(C{O_2}\) at the enzyme site. This takes place when the \({C_4}\) acid from the mesophyll is broken down in the bundle sheath cells to release \(C{O_2}\) – this results in increasing the intracellular concentration of \(C{O_2}\). In turn, this ensures that the RuBisCO functions as a carboxylase minimising the oxygenase activity.
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337351
In \({C_3}\) plants some \({O_2}\) does bind to RuBisCO, as result of this__
1 \({O_2}\) fixation is decreased
2 \(C{O_2}\) fixation is decreased
3 \(C{O_2}\) fixation is increased
4 Both (1) and (3)
Explanation:
In \({C_3}\) plants some \({O_2}\) does bind to RuBisCO, and hence \(C{O_2}\) fixation is decreased.
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337352
During photorespiration instead of being converted to 2 molecules of PGA RuBP forms_
1 One molecule of phosphoglycerate and phosphoglycolate
2 One molecule of phosphoenol and phosphoglycerate
3 One molecule of ethanol and pyruvic acid
4 One molecule of succinate and ethanol
Explanation:
RuBP instead of being converted to 2 molecules of PGA binds with \({O_2}\) to form one molecule of phosphoglycerate and phosphoglycolate in a pathway called photorespiration.
337349
A process that makes important difference between \({C_3}\) and \({C_4}\) plants is
1 Transpiration
2 Glycolysis
3 Photosynthesis
4 Photorespiration
Explanation:
Photorespiration is light-dependent process which occurs in \({C_3}\) plants. During this process uptake of \({O_2}\) and release of \(C{O_2}\) takes place which is an opposite process of photosynthesis. In \({C_4}\) plants photorespiration does not take place. It has kranz anatomy.
AIPMT - 2012
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337350
Why photorespiration is absent in \({C_4}\) plants?
1 Stomata closes when \({O_2}\) concentration is high
2 Stomata opens only when \(C{O_2}\) concentration is high
3 Intracellular \(C{O_2}\) concentration is high in bundle sheath and it ensures RuBisCO function as carboxylase
4 Intracellular \(C{O_2}\) concentration is high in bundle sheath and it ensures RuBisCO function as oxygenase
Explanation:
In \({C_4}\) plants photorespiration does not occur. This is because they have a mechanism that increases the concentration of \(C{O_2}\) at the enzyme site. This takes place when the \({C_4}\) acid from the mesophyll is broken down in the bundle sheath cells to release \(C{O_2}\) – this results in increasing the intracellular concentration of \(C{O_2}\). In turn, this ensures that the RuBisCO functions as a carboxylase minimising the oxygenase activity.
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337351
In \({C_3}\) plants some \({O_2}\) does bind to RuBisCO, as result of this__
1 \({O_2}\) fixation is decreased
2 \(C{O_2}\) fixation is decreased
3 \(C{O_2}\) fixation is increased
4 Both (1) and (3)
Explanation:
In \({C_3}\) plants some \({O_2}\) does bind to RuBisCO, and hence \(C{O_2}\) fixation is decreased.
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337352
During photorespiration instead of being converted to 2 molecules of PGA RuBP forms_
1 One molecule of phosphoglycerate and phosphoglycolate
2 One molecule of phosphoenol and phosphoglycerate
3 One molecule of ethanol and pyruvic acid
4 One molecule of succinate and ethanol
Explanation:
RuBP instead of being converted to 2 molecules of PGA binds with \({O_2}\) to form one molecule of phosphoglycerate and phosphoglycolate in a pathway called photorespiration.
337349
A process that makes important difference between \({C_3}\) and \({C_4}\) plants is
1 Transpiration
2 Glycolysis
3 Photosynthesis
4 Photorespiration
Explanation:
Photorespiration is light-dependent process which occurs in \({C_3}\) plants. During this process uptake of \({O_2}\) and release of \(C{O_2}\) takes place which is an opposite process of photosynthesis. In \({C_4}\) plants photorespiration does not take place. It has kranz anatomy.
AIPMT - 2012
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337350
Why photorespiration is absent in \({C_4}\) plants?
1 Stomata closes when \({O_2}\) concentration is high
2 Stomata opens only when \(C{O_2}\) concentration is high
3 Intracellular \(C{O_2}\) concentration is high in bundle sheath and it ensures RuBisCO function as carboxylase
4 Intracellular \(C{O_2}\) concentration is high in bundle sheath and it ensures RuBisCO function as oxygenase
Explanation:
In \({C_4}\) plants photorespiration does not occur. This is because they have a mechanism that increases the concentration of \(C{O_2}\) at the enzyme site. This takes place when the \({C_4}\) acid from the mesophyll is broken down in the bundle sheath cells to release \(C{O_2}\) – this results in increasing the intracellular concentration of \(C{O_2}\). In turn, this ensures that the RuBisCO functions as a carboxylase minimising the oxygenase activity.
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337351
In \({C_3}\) plants some \({O_2}\) does bind to RuBisCO, as result of this__
1 \({O_2}\) fixation is decreased
2 \(C{O_2}\) fixation is decreased
3 \(C{O_2}\) fixation is increased
4 Both (1) and (3)
Explanation:
In \({C_3}\) plants some \({O_2}\) does bind to RuBisCO, and hence \(C{O_2}\) fixation is decreased.
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337352
During photorespiration instead of being converted to 2 molecules of PGA RuBP forms_
1 One molecule of phosphoglycerate and phosphoglycolate
2 One molecule of phosphoenol and phosphoglycerate
3 One molecule of ethanol and pyruvic acid
4 One molecule of succinate and ethanol
Explanation:
RuBP instead of being converted to 2 molecules of PGA binds with \({O_2}\) to form one molecule of phosphoglycerate and phosphoglycolate in a pathway called photorespiration.
337349
A process that makes important difference between \({C_3}\) and \({C_4}\) plants is
1 Transpiration
2 Glycolysis
3 Photosynthesis
4 Photorespiration
Explanation:
Photorespiration is light-dependent process which occurs in \({C_3}\) plants. During this process uptake of \({O_2}\) and release of \(C{O_2}\) takes place which is an opposite process of photosynthesis. In \({C_4}\) plants photorespiration does not take place. It has kranz anatomy.
AIPMT - 2012
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337350
Why photorespiration is absent in \({C_4}\) plants?
1 Stomata closes when \({O_2}\) concentration is high
2 Stomata opens only when \(C{O_2}\) concentration is high
3 Intracellular \(C{O_2}\) concentration is high in bundle sheath and it ensures RuBisCO function as carboxylase
4 Intracellular \(C{O_2}\) concentration is high in bundle sheath and it ensures RuBisCO function as oxygenase
Explanation:
In \({C_4}\) plants photorespiration does not occur. This is because they have a mechanism that increases the concentration of \(C{O_2}\) at the enzyme site. This takes place when the \({C_4}\) acid from the mesophyll is broken down in the bundle sheath cells to release \(C{O_2}\) – this results in increasing the intracellular concentration of \(C{O_2}\). In turn, this ensures that the RuBisCO functions as a carboxylase minimising the oxygenase activity.
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337351
In \({C_3}\) plants some \({O_2}\) does bind to RuBisCO, as result of this__
1 \({O_2}\) fixation is decreased
2 \(C{O_2}\) fixation is decreased
3 \(C{O_2}\) fixation is increased
4 Both (1) and (3)
Explanation:
In \({C_3}\) plants some \({O_2}\) does bind to RuBisCO, and hence \(C{O_2}\) fixation is decreased.
BIOXI13: PHOTOSYNTHESIS IN HIGHER PLANTS
337352
During photorespiration instead of being converted to 2 molecules of PGA RuBP forms_
1 One molecule of phosphoglycerate and phosphoglycolate
2 One molecule of phosphoenol and phosphoglycerate
3 One molecule of ethanol and pyruvic acid
4 One molecule of succinate and ethanol
Explanation:
RuBP instead of being converted to 2 molecules of PGA binds with \({O_2}\) to form one molecule of phosphoglycerate and phosphoglycolate in a pathway called photorespiration.
