237968
A plant is provided with ideal conditions for photosynthesis and supplied with isotope ${ }^{4} \mathrm{CO}_{2}$. When the products of the process are analysed carefully, what would be the nature of products?
1 Both glucose and oxygen are labelled.
2 Only oxygen is labeled but glucose is normal.
3 Both glucose and oxygen are normal.
4 Only glucose is labeled and oxygen is normal
Explanation:
D When a plant provided with ${ }^{14} \mathrm{CO}_{2}$ indicates that the $\mathrm{CO}_{2}$ contains a radioactive isotope of carbon (C), only glucose will be labeled with radioactive carbon. This is because during photosynthesis, plants use $\mathrm{CO}_{2}$ to synthesize glucose.
Karnataka CET-2016
Photosynthesis in higher plants
237970
Emerson's enhancement effect and Red drop have been instrumental in the discovery of:
1 Oxidative phosphorylation
2 Photophosphorylation and non-cyclic electron transport
3 Two photo systems operating simultaneously
4 Photophosphorylation and cyclic electron transport
Explanation:
C Emerson's enhancement effect and the red drop experiment were crucial in revealing that photosynthesis relies on two photosystem operating together: Photosystem I (PS-I) and photosystem II (PSII). These system work simultaneously to convert light energy into chemical energy which produce ATP and NADPH, essential for the process of photosynthesis.
NEET-2016 Phase-I
Photosynthesis in higher plants
237977
In photosynthesis electron transport system, manganese ions are associated with:
1 oxygen evolving complex
2 $\mathrm{CF}_{0}-\mathrm{CF}_{1}$ complex
3 cytochrome $\mathrm{b}_{6}-\mathrm{f}$ complex
4 plastoquinones
Explanation:
A In PS - II there is a complex of proteins with $\mathrm{Mn}^{2+}$ known as the water splitting center, which extracts the electrons from water with the release of oxygen and protons $\left(\mathrm{H}^{+}\right)$and passes them on to $\mathrm{P}_{680}$ molecules.
AP EAMCET-2002
Photosynthesis in higher plants
237978
Photosynthetic enhancement with flashing light was first observed by :
1 Benson and Calvin
2 Hill and Calvin
3 Hatch and Slack
4 Emerson and Arnold
Explanation:
D Photosynthetic enhancement with flashing light was first observed by Emerson and Arnold. Robert Emerson and his coworkers gives the evidence of two pigment system in light reaction of photosynthesis. These are photosystem I and photosystem II.
237968
A plant is provided with ideal conditions for photosynthesis and supplied with isotope ${ }^{4} \mathrm{CO}_{2}$. When the products of the process are analysed carefully, what would be the nature of products?
1 Both glucose and oxygen are labelled.
2 Only oxygen is labeled but glucose is normal.
3 Both glucose and oxygen are normal.
4 Only glucose is labeled and oxygen is normal
Explanation:
D When a plant provided with ${ }^{14} \mathrm{CO}_{2}$ indicates that the $\mathrm{CO}_{2}$ contains a radioactive isotope of carbon (C), only glucose will be labeled with radioactive carbon. This is because during photosynthesis, plants use $\mathrm{CO}_{2}$ to synthesize glucose.
Karnataka CET-2016
Photosynthesis in higher plants
237970
Emerson's enhancement effect and Red drop have been instrumental in the discovery of:
1 Oxidative phosphorylation
2 Photophosphorylation and non-cyclic electron transport
3 Two photo systems operating simultaneously
4 Photophosphorylation and cyclic electron transport
Explanation:
C Emerson's enhancement effect and the red drop experiment were crucial in revealing that photosynthesis relies on two photosystem operating together: Photosystem I (PS-I) and photosystem II (PSII). These system work simultaneously to convert light energy into chemical energy which produce ATP and NADPH, essential for the process of photosynthesis.
NEET-2016 Phase-I
Photosynthesis in higher plants
237977
In photosynthesis electron transport system, manganese ions are associated with:
1 oxygen evolving complex
2 $\mathrm{CF}_{0}-\mathrm{CF}_{1}$ complex
3 cytochrome $\mathrm{b}_{6}-\mathrm{f}$ complex
4 plastoquinones
Explanation:
A In PS - II there is a complex of proteins with $\mathrm{Mn}^{2+}$ known as the water splitting center, which extracts the electrons from water with the release of oxygen and protons $\left(\mathrm{H}^{+}\right)$and passes them on to $\mathrm{P}_{680}$ molecules.
AP EAMCET-2002
Photosynthesis in higher plants
237978
Photosynthetic enhancement with flashing light was first observed by :
1 Benson and Calvin
2 Hill and Calvin
3 Hatch and Slack
4 Emerson and Arnold
Explanation:
D Photosynthetic enhancement with flashing light was first observed by Emerson and Arnold. Robert Emerson and his coworkers gives the evidence of two pigment system in light reaction of photosynthesis. These are photosystem I and photosystem II.
237968
A plant is provided with ideal conditions for photosynthesis and supplied with isotope ${ }^{4} \mathrm{CO}_{2}$. When the products of the process are analysed carefully, what would be the nature of products?
1 Both glucose and oxygen are labelled.
2 Only oxygen is labeled but glucose is normal.
3 Both glucose and oxygen are normal.
4 Only glucose is labeled and oxygen is normal
Explanation:
D When a plant provided with ${ }^{14} \mathrm{CO}_{2}$ indicates that the $\mathrm{CO}_{2}$ contains a radioactive isotope of carbon (C), only glucose will be labeled with radioactive carbon. This is because during photosynthesis, plants use $\mathrm{CO}_{2}$ to synthesize glucose.
Karnataka CET-2016
Photosynthesis in higher plants
237970
Emerson's enhancement effect and Red drop have been instrumental in the discovery of:
1 Oxidative phosphorylation
2 Photophosphorylation and non-cyclic electron transport
3 Two photo systems operating simultaneously
4 Photophosphorylation and cyclic electron transport
Explanation:
C Emerson's enhancement effect and the red drop experiment were crucial in revealing that photosynthesis relies on two photosystem operating together: Photosystem I (PS-I) and photosystem II (PSII). These system work simultaneously to convert light energy into chemical energy which produce ATP and NADPH, essential for the process of photosynthesis.
NEET-2016 Phase-I
Photosynthesis in higher plants
237977
In photosynthesis electron transport system, manganese ions are associated with:
1 oxygen evolving complex
2 $\mathrm{CF}_{0}-\mathrm{CF}_{1}$ complex
3 cytochrome $\mathrm{b}_{6}-\mathrm{f}$ complex
4 plastoquinones
Explanation:
A In PS - II there is a complex of proteins with $\mathrm{Mn}^{2+}$ known as the water splitting center, which extracts the electrons from water with the release of oxygen and protons $\left(\mathrm{H}^{+}\right)$and passes them on to $\mathrm{P}_{680}$ molecules.
AP EAMCET-2002
Photosynthesis in higher plants
237978
Photosynthetic enhancement with flashing light was first observed by :
1 Benson and Calvin
2 Hill and Calvin
3 Hatch and Slack
4 Emerson and Arnold
Explanation:
D Photosynthetic enhancement with flashing light was first observed by Emerson and Arnold. Robert Emerson and his coworkers gives the evidence of two pigment system in light reaction of photosynthesis. These are photosystem I and photosystem II.
237968
A plant is provided with ideal conditions for photosynthesis and supplied with isotope ${ }^{4} \mathrm{CO}_{2}$. When the products of the process are analysed carefully, what would be the nature of products?
1 Both glucose and oxygen are labelled.
2 Only oxygen is labeled but glucose is normal.
3 Both glucose and oxygen are normal.
4 Only glucose is labeled and oxygen is normal
Explanation:
D When a plant provided with ${ }^{14} \mathrm{CO}_{2}$ indicates that the $\mathrm{CO}_{2}$ contains a radioactive isotope of carbon (C), only glucose will be labeled with radioactive carbon. This is because during photosynthesis, plants use $\mathrm{CO}_{2}$ to synthesize glucose.
Karnataka CET-2016
Photosynthesis in higher plants
237970
Emerson's enhancement effect and Red drop have been instrumental in the discovery of:
1 Oxidative phosphorylation
2 Photophosphorylation and non-cyclic electron transport
3 Two photo systems operating simultaneously
4 Photophosphorylation and cyclic electron transport
Explanation:
C Emerson's enhancement effect and the red drop experiment were crucial in revealing that photosynthesis relies on two photosystem operating together: Photosystem I (PS-I) and photosystem II (PSII). These system work simultaneously to convert light energy into chemical energy which produce ATP and NADPH, essential for the process of photosynthesis.
NEET-2016 Phase-I
Photosynthesis in higher plants
237977
In photosynthesis electron transport system, manganese ions are associated with:
1 oxygen evolving complex
2 $\mathrm{CF}_{0}-\mathrm{CF}_{1}$ complex
3 cytochrome $\mathrm{b}_{6}-\mathrm{f}$ complex
4 plastoquinones
Explanation:
A In PS - II there is a complex of proteins with $\mathrm{Mn}^{2+}$ known as the water splitting center, which extracts the electrons from water with the release of oxygen and protons $\left(\mathrm{H}^{+}\right)$and passes them on to $\mathrm{P}_{680}$ molecules.
AP EAMCET-2002
Photosynthesis in higher plants
237978
Photosynthetic enhancement with flashing light was first observed by :
1 Benson and Calvin
2 Hill and Calvin
3 Hatch and Slack
4 Emerson and Arnold
Explanation:
D Photosynthetic enhancement with flashing light was first observed by Emerson and Arnold. Robert Emerson and his coworkers gives the evidence of two pigment system in light reaction of photosynthesis. These are photosystem I and photosystem II.
