NEET Test Series from KOTA - 10 Papers In MS WORD
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Photosynthesis in higher plants
238115
Which of the following is not a $C_{4}$ plant
1 Maize
2 Tribulus
3 Amaranthus
4 Wheat
Explanation:
D $\mathbf{C}_{4}$ plants- Including maize, sugarcane and sorghum avoid photorespiration by using another enzyme called PEP during the first step of carbon fixation. This step takes place in the mesophyll cells that are located close to the stomata where $\mathrm{CO}_{2}$ and $\mathrm{O}_{2}$ enter the plant. Beans, rice, wheat, potatoes, most temperate crops and all woody trees is not a $\mathrm{C}_{4}$ plant.
SRM JEEE-2019
Photosynthesis in higher plants
238116
An example of $\mathrm{C} 4$ plant is
1 Coconut
2 Mango
3 Rice
4 Sugarcane
Explanation:
D $\mathrm{C} 4$ plant is one that enters the Calvin cycle by converting carbon dioxide into four-carbon sugar molecules. These plants produce a lot of energy and are highly effective in hot, dry environments. Examples of C4 plants include sugarcane, corn, sorghum, millet etc.
SRM JEEE-2019
Photosynthesis in higher plants
238118
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
1 Light saturation for $\mathrm{CO}_{2}$ fixation occurs at $10 \%$ of full sunlight
2 Increasing atmospheric $\mathrm{CO}_{2}$ concentration up to $0.05 \%$ can enhance $\mathrm{CO}_{2}$ fixation rate
3 $\mathrm{C}_{3}$ plants responds to higher temperatures with enhanced photosynthesis while $\mathrm{C}_{4}$ plants have much lower temperature optimum
4 Tomato is a greenhouse crop which can be grown in $\mathrm{CO}_{2}^{-}$enriched atmosphere for higher yield
Explanation:
C At high temperature and light oxygen has a higher affinity for the enzyme RuBisCO. Oxygen bind to $\mathrm{RuBisCO}$ instead of carbon dioxide, thus reduces $\mathrm{C}_{3}$ plant photosynthetic efficiency and water use efficiency. Thus, in environments with high temperature and light, $\mathrm{C}_{4}$ plants shows initial carbon fixation in mesophyll cells where PEP, Combines with carbon dioxide to form OAA. Which is further processed significantly improving the plants photosynthetic and water use efficiency. As a result in high light and temperature environments, $\mathrm{C}_{4}$ plants tend to be more productive than $\mathrm{C}_{3}$ plants.
NEET-2017
Photosynthesis in higher plants
238120
If bundle sheath cells of the $C_{4}$ plants are infected by an organism, which utilize $\mathrm{CO}_{2}$ efficiently then which process will be affected very first?
1 PGAL \(\quad \rightarrow\) RuBP
2 PGAL+PGA \(\quad \rightarrow\) Glucose
3 PGA \(\rightarrow\) PGAL
4 RuBP \(\quad \rightarrow\) PGA
Explanation:
D The chloroplast and the enzymes needed for the Calvin cycle are found in the bundle sheath cells of $\mathrm{C}_{4}$ plants. The enzyme RuBisCO combines RuBP (ribulose bisphosphate) with $\mathrm{CO}_{2}$ to produce PGA (3Phosphoglycerate), which is the first reaction in the Calvin cycle.
238115
Which of the following is not a $C_{4}$ plant
1 Maize
2 Tribulus
3 Amaranthus
4 Wheat
Explanation:
D $\mathbf{C}_{4}$ plants- Including maize, sugarcane and sorghum avoid photorespiration by using another enzyme called PEP during the first step of carbon fixation. This step takes place in the mesophyll cells that are located close to the stomata where $\mathrm{CO}_{2}$ and $\mathrm{O}_{2}$ enter the plant. Beans, rice, wheat, potatoes, most temperate crops and all woody trees is not a $\mathrm{C}_{4}$ plant.
SRM JEEE-2019
Photosynthesis in higher plants
238116
An example of $\mathrm{C} 4$ plant is
1 Coconut
2 Mango
3 Rice
4 Sugarcane
Explanation:
D $\mathrm{C} 4$ plant is one that enters the Calvin cycle by converting carbon dioxide into four-carbon sugar molecules. These plants produce a lot of energy and are highly effective in hot, dry environments. Examples of C4 plants include sugarcane, corn, sorghum, millet etc.
SRM JEEE-2019
Photosynthesis in higher plants
238118
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
1 Light saturation for $\mathrm{CO}_{2}$ fixation occurs at $10 \%$ of full sunlight
2 Increasing atmospheric $\mathrm{CO}_{2}$ concentration up to $0.05 \%$ can enhance $\mathrm{CO}_{2}$ fixation rate
3 $\mathrm{C}_{3}$ plants responds to higher temperatures with enhanced photosynthesis while $\mathrm{C}_{4}$ plants have much lower temperature optimum
4 Tomato is a greenhouse crop which can be grown in $\mathrm{CO}_{2}^{-}$enriched atmosphere for higher yield
Explanation:
C At high temperature and light oxygen has a higher affinity for the enzyme RuBisCO. Oxygen bind to $\mathrm{RuBisCO}$ instead of carbon dioxide, thus reduces $\mathrm{C}_{3}$ plant photosynthetic efficiency and water use efficiency. Thus, in environments with high temperature and light, $\mathrm{C}_{4}$ plants shows initial carbon fixation in mesophyll cells where PEP, Combines with carbon dioxide to form OAA. Which is further processed significantly improving the plants photosynthetic and water use efficiency. As a result in high light and temperature environments, $\mathrm{C}_{4}$ plants tend to be more productive than $\mathrm{C}_{3}$ plants.
NEET-2017
Photosynthesis in higher plants
238120
If bundle sheath cells of the $C_{4}$ plants are infected by an organism, which utilize $\mathrm{CO}_{2}$ efficiently then which process will be affected very first?
1 PGAL \(\quad \rightarrow\) RuBP
2 PGAL+PGA \(\quad \rightarrow\) Glucose
3 PGA \(\rightarrow\) PGAL
4 RuBP \(\quad \rightarrow\) PGA
Explanation:
D The chloroplast and the enzymes needed for the Calvin cycle are found in the bundle sheath cells of $\mathrm{C}_{4}$ plants. The enzyme RuBisCO combines RuBP (ribulose bisphosphate) with $\mathrm{CO}_{2}$ to produce PGA (3Phosphoglycerate), which is the first reaction in the Calvin cycle.
238115
Which of the following is not a $C_{4}$ plant
1 Maize
2 Tribulus
3 Amaranthus
4 Wheat
Explanation:
D $\mathbf{C}_{4}$ plants- Including maize, sugarcane and sorghum avoid photorespiration by using another enzyme called PEP during the first step of carbon fixation. This step takes place in the mesophyll cells that are located close to the stomata where $\mathrm{CO}_{2}$ and $\mathrm{O}_{2}$ enter the plant. Beans, rice, wheat, potatoes, most temperate crops and all woody trees is not a $\mathrm{C}_{4}$ plant.
SRM JEEE-2019
Photosynthesis in higher plants
238116
An example of $\mathrm{C} 4$ plant is
1 Coconut
2 Mango
3 Rice
4 Sugarcane
Explanation:
D $\mathrm{C} 4$ plant is one that enters the Calvin cycle by converting carbon dioxide into four-carbon sugar molecules. These plants produce a lot of energy and are highly effective in hot, dry environments. Examples of C4 plants include sugarcane, corn, sorghum, millet etc.
SRM JEEE-2019
Photosynthesis in higher plants
238118
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
1 Light saturation for $\mathrm{CO}_{2}$ fixation occurs at $10 \%$ of full sunlight
2 Increasing atmospheric $\mathrm{CO}_{2}$ concentration up to $0.05 \%$ can enhance $\mathrm{CO}_{2}$ fixation rate
3 $\mathrm{C}_{3}$ plants responds to higher temperatures with enhanced photosynthesis while $\mathrm{C}_{4}$ plants have much lower temperature optimum
4 Tomato is a greenhouse crop which can be grown in $\mathrm{CO}_{2}^{-}$enriched atmosphere for higher yield
Explanation:
C At high temperature and light oxygen has a higher affinity for the enzyme RuBisCO. Oxygen bind to $\mathrm{RuBisCO}$ instead of carbon dioxide, thus reduces $\mathrm{C}_{3}$ plant photosynthetic efficiency and water use efficiency. Thus, in environments with high temperature and light, $\mathrm{C}_{4}$ plants shows initial carbon fixation in mesophyll cells where PEP, Combines with carbon dioxide to form OAA. Which is further processed significantly improving the plants photosynthetic and water use efficiency. As a result in high light and temperature environments, $\mathrm{C}_{4}$ plants tend to be more productive than $\mathrm{C}_{3}$ plants.
NEET-2017
Photosynthesis in higher plants
238120
If bundle sheath cells of the $C_{4}$ plants are infected by an organism, which utilize $\mathrm{CO}_{2}$ efficiently then which process will be affected very first?
1 PGAL \(\quad \rightarrow\) RuBP
2 PGAL+PGA \(\quad \rightarrow\) Glucose
3 PGA \(\rightarrow\) PGAL
4 RuBP \(\quad \rightarrow\) PGA
Explanation:
D The chloroplast and the enzymes needed for the Calvin cycle are found in the bundle sheath cells of $\mathrm{C}_{4}$ plants. The enzyme RuBisCO combines RuBP (ribulose bisphosphate) with $\mathrm{CO}_{2}$ to produce PGA (3Phosphoglycerate), which is the first reaction in the Calvin cycle.
238115
Which of the following is not a $C_{4}$ plant
1 Maize
2 Tribulus
3 Amaranthus
4 Wheat
Explanation:
D $\mathbf{C}_{4}$ plants- Including maize, sugarcane and sorghum avoid photorespiration by using another enzyme called PEP during the first step of carbon fixation. This step takes place in the mesophyll cells that are located close to the stomata where $\mathrm{CO}_{2}$ and $\mathrm{O}_{2}$ enter the plant. Beans, rice, wheat, potatoes, most temperate crops and all woody trees is not a $\mathrm{C}_{4}$ plant.
SRM JEEE-2019
Photosynthesis in higher plants
238116
An example of $\mathrm{C} 4$ plant is
1 Coconut
2 Mango
3 Rice
4 Sugarcane
Explanation:
D $\mathrm{C} 4$ plant is one that enters the Calvin cycle by converting carbon dioxide into four-carbon sugar molecules. These plants produce a lot of energy and are highly effective in hot, dry environments. Examples of C4 plants include sugarcane, corn, sorghum, millet etc.
SRM JEEE-2019
Photosynthesis in higher plants
238118
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
1 Light saturation for $\mathrm{CO}_{2}$ fixation occurs at $10 \%$ of full sunlight
2 Increasing atmospheric $\mathrm{CO}_{2}$ concentration up to $0.05 \%$ can enhance $\mathrm{CO}_{2}$ fixation rate
3 $\mathrm{C}_{3}$ plants responds to higher temperatures with enhanced photosynthesis while $\mathrm{C}_{4}$ plants have much lower temperature optimum
4 Tomato is a greenhouse crop which can be grown in $\mathrm{CO}_{2}^{-}$enriched atmosphere for higher yield
Explanation:
C At high temperature and light oxygen has a higher affinity for the enzyme RuBisCO. Oxygen bind to $\mathrm{RuBisCO}$ instead of carbon dioxide, thus reduces $\mathrm{C}_{3}$ plant photosynthetic efficiency and water use efficiency. Thus, in environments with high temperature and light, $\mathrm{C}_{4}$ plants shows initial carbon fixation in mesophyll cells where PEP, Combines with carbon dioxide to form OAA. Which is further processed significantly improving the plants photosynthetic and water use efficiency. As a result in high light and temperature environments, $\mathrm{C}_{4}$ plants tend to be more productive than $\mathrm{C}_{3}$ plants.
NEET-2017
Photosynthesis in higher plants
238120
If bundle sheath cells of the $C_{4}$ plants are infected by an organism, which utilize $\mathrm{CO}_{2}$ efficiently then which process will be affected very first?
1 PGAL \(\quad \rightarrow\) RuBP
2 PGAL+PGA \(\quad \rightarrow\) Glucose
3 PGA \(\rightarrow\) PGAL
4 RuBP \(\quad \rightarrow\) PGA
Explanation:
D The chloroplast and the enzymes needed for the Calvin cycle are found in the bundle sheath cells of $\mathrm{C}_{4}$ plants. The enzyme RuBisCO combines RuBP (ribulose bisphosphate) with $\mathrm{CO}_{2}$ to produce PGA (3Phosphoglycerate), which is the first reaction in the Calvin cycle.
