QBManager

Photosynthesis in higher plants

238124 Which of the following characteristics out of $I$ , II and III are exhibited by $C_{4}$ plants?
I. Kranz anatomy.
II. The product of photosynthesis is oxalo acetic acid.
III. Both PEP carboxylase and ribulose-bis phosphate carboxylase act as carboxylating enzyme.
Choose the correct option:

1 I and II, but not III

2 II and III but not I

3 I and III, but not II

4 All of these

Explanation:

D $C_{4}$ plants have an alternative ${CO}_{2}$ fixation pathway called the Hatch and Slack cycle where OAA is the first stable product. The leaf of these plants has kranz anatomy where the vascular bundles are surrounded by the bundle sheath. Here, two carboxylation reactions take place, first by PEP carboxylase in the mesophyll chloroplast and second by RuBisCO in the bundle sheath chloroplast.

JIPMER-2015

Photosynthesis in higher plants

238125 If ' $X$ ' molecules of ATP are utilised to produce one molecule of glucose during photosynthesis of a $C_{3}$ -plant and ' $Y$ ' molecules of ATP are formed through substrate level phosphorylation during the breakdown of one molecule of glucose in aerobic respiration, then the ratio of ' $X$ ' and ' $Y$ ' is

1

3 : 1

2

5 : 2

3

1 : 1

4

2 : 3

Explanation:

A In the photosynthesis of $C_{3}$ plants, one molecule of glucose is produced using 6ATP molecules, and 2ATP molecules is produced during the aerobic respiration process when one molecule of glucose is broken down. Hence the ratio of $x$ and $y$ is $3 : 1$ .

AP EAMCET-2010

Photosynthesis in higher plants

238134 Which one is a $C_{4}$ - plant?

1 Papaya

2 Pea

3 Potato

4 Maize/corn

Explanation:

D A Maize/corn $C_{4}$ plant that utilizes the $C_{4}$ fixation pathway. This pathway is when the ${CO}_{2}$ is first bound to phosphoenol pyruvate in the mesophyll cell. Example of $C_{4}$ plants are sugar cane, maize/corn etc. $C_{4}$ plants are well adapted to habitats with high day time temperature, intense sunlight, low water condition.

AIPMT-1993

Photosynthesis in higher plants

238135 In $C_{4}$ plants, Calvin cycle operates in

1 stroma of bundle sheath chloroplasts

2 grana of bundle sheath chloroplasts

3 grana of mesophyll chloroplasts

4 stroma of mesophyll chloroplasts

AIPMT-1989

Photosynthesis in higher plants

238136 $C_{4}$ plants can absorb ${CO}_{2}$ from

1 Its much low concentration

2 Its much high concentration

3 Carbonates

4 Bicarbonates

Explanation:

A The enzyme PEP carboxylase present in $C_{4}$ plants is very sensitive to ${CO}_{2}$ that is why $C_{4}$ plant can absorb ${CO}_{2}$ even from its much low concentration. An increase in the concentration of ${CO}_{2}$ increase the rate of photosynthesis.

CMC Vellore-2007

Photosynthesis in higher plants

238124 Which of the following characteristics out of $I$ , II and III are exhibited by $C_{4}$ plants?
I. Kranz anatomy.
II. The product of photosynthesis is oxalo acetic acid.
III. Both PEP carboxylase and ribulose-bis phosphate carboxylase act as carboxylating enzyme.
Choose the correct option:

1 I and II, but not III

2 II and III but not I

3 I and III, but not II

4 All of these

Explanation:

D $C_{4}$ plants have an alternative ${CO}_{2}$ fixation pathway called the Hatch and Slack cycle where OAA is the first stable product. The leaf of these plants has kranz anatomy where the vascular bundles are surrounded by the bundle sheath. Here, two carboxylation reactions take place, first by PEP carboxylase in the mesophyll chloroplast and second by RuBisCO in the bundle sheath chloroplast.

JIPMER-2015

Photosynthesis in higher plants

238125 If ' $X$ ' molecules of ATP are utilised to produce one molecule of glucose during photosynthesis of a $C_{3}$ -plant and ' $Y$ ' molecules of ATP are formed through substrate level phosphorylation during the breakdown of one molecule of glucose in aerobic respiration, then the ratio of ' $X$ ' and ' $Y$ ' is

1

3 : 1

2

5 : 2

3

1 : 1

4

2 : 3

Explanation:

A In the photosynthesis of $C_{3}$ plants, one molecule of glucose is produced using 6ATP molecules, and 2ATP molecules is produced during the aerobic respiration process when one molecule of glucose is broken down. Hence the ratio of $x$ and $y$ is $3 : 1$ .

AP EAMCET-2010

Photosynthesis in higher plants

238134 Which one is a $C_{4}$ - plant?

1 Papaya

2 Pea

3 Potato

4 Maize/corn

Explanation:

D A Maize/corn $C_{4}$ plant that utilizes the $C_{4}$ fixation pathway. This pathway is when the ${CO}_{2}$ is first bound to phosphoenol pyruvate in the mesophyll cell. Example of $C_{4}$ plants are sugar cane, maize/corn etc. $C_{4}$ plants are well adapted to habitats with high day time temperature, intense sunlight, low water condition.

AIPMT-1993

Photosynthesis in higher plants

238135 In $C_{4}$ plants, Calvin cycle operates in

1 stroma of bundle sheath chloroplasts

2 grana of bundle sheath chloroplasts

3 grana of mesophyll chloroplasts

4 stroma of mesophyll chloroplasts

AIPMT-1989

Photosynthesis in higher plants

238136 $C_{4}$ plants can absorb ${CO}_{2}$ from

1 Its much low concentration

2 Its much high concentration

3 Carbonates

4 Bicarbonates

Explanation:

A The enzyme PEP carboxylase present in $C_{4}$ plants is very sensitive to ${CO}_{2}$ that is why $C_{4}$ plant can absorb ${CO}_{2}$ even from its much low concentration. An increase in the concentration of ${CO}_{2}$ increase the rate of photosynthesis.

CMC Vellore-2007

Photosynthesis in higher plants

238124 Which of the following characteristics out of $I$ , II and III are exhibited by $C_{4}$ plants?
I. Kranz anatomy.
II. The product of photosynthesis is oxalo acetic acid.
III. Both PEP carboxylase and ribulose-bis phosphate carboxylase act as carboxylating enzyme.
Choose the correct option:

1 I and II, but not III

2 II and III but not I

3 I and III, but not II

4 All of these

Explanation:

D $C_{4}$ plants have an alternative ${CO}_{2}$ fixation pathway called the Hatch and Slack cycle where OAA is the first stable product. The leaf of these plants has kranz anatomy where the vascular bundles are surrounded by the bundle sheath. Here, two carboxylation reactions take place, first by PEP carboxylase in the mesophyll chloroplast and second by RuBisCO in the bundle sheath chloroplast.

JIPMER-2015

Photosynthesis in higher plants

238125 If ' $X$ ' molecules of ATP are utilised to produce one molecule of glucose during photosynthesis of a $C_{3}$ -plant and ' $Y$ ' molecules of ATP are formed through substrate level phosphorylation during the breakdown of one molecule of glucose in aerobic respiration, then the ratio of ' $X$ ' and ' $Y$ ' is

1

3 : 1

2

5 : 2

3

1 : 1

4

2 : 3

Explanation:

A In the photosynthesis of $C_{3}$ plants, one molecule of glucose is produced using 6ATP molecules, and 2ATP molecules is produced during the aerobic respiration process when one molecule of glucose is broken down. Hence the ratio of $x$ and $y$ is $3 : 1$ .

AP EAMCET-2010

Photosynthesis in higher plants

238134 Which one is a $C_{4}$ - plant?

1 Papaya

2 Pea

3 Potato

4 Maize/corn

Explanation:

D A Maize/corn $C_{4}$ plant that utilizes the $C_{4}$ fixation pathway. This pathway is when the ${CO}_{2}$ is first bound to phosphoenol pyruvate in the mesophyll cell. Example of $C_{4}$ plants are sugar cane, maize/corn etc. $C_{4}$ plants are well adapted to habitats with high day time temperature, intense sunlight, low water condition.

AIPMT-1993

Photosynthesis in higher plants

238135 In $C_{4}$ plants, Calvin cycle operates in

1 stroma of bundle sheath chloroplasts

2 grana of bundle sheath chloroplasts

3 grana of mesophyll chloroplasts

4 stroma of mesophyll chloroplasts

AIPMT-1989

Photosynthesis in higher plants

238136 $C_{4}$ plants can absorb ${CO}_{2}$ from

1 Its much low concentration

2 Its much high concentration

3 Carbonates

4 Bicarbonates

Explanation:

A The enzyme PEP carboxylase present in $C_{4}$ plants is very sensitive to ${CO}_{2}$ that is why $C_{4}$ plant can absorb ${CO}_{2}$ even from its much low concentration. An increase in the concentration of ${CO}_{2}$ increase the rate of photosynthesis.

CMC Vellore-2007

Photosynthesis in higher plants

238124 Which of the following characteristics out of $I$ , II and III are exhibited by $C_{4}$ plants?
I. Kranz anatomy.
II. The product of photosynthesis is oxalo acetic acid.
III. Both PEP carboxylase and ribulose-bis phosphate carboxylase act as carboxylating enzyme.
Choose the correct option:

1 I and II, but not III

2 II and III but not I

3 I and III, but not II

4 All of these

Explanation:

D $C_{4}$ plants have an alternative ${CO}_{2}$ fixation pathway called the Hatch and Slack cycle where OAA is the first stable product. The leaf of these plants has kranz anatomy where the vascular bundles are surrounded by the bundle sheath. Here, two carboxylation reactions take place, first by PEP carboxylase in the mesophyll chloroplast and second by RuBisCO in the bundle sheath chloroplast.

JIPMER-2015

Photosynthesis in higher plants

238125 If ' $X$ ' molecules of ATP are utilised to produce one molecule of glucose during photosynthesis of a $C_{3}$ -plant and ' $Y$ ' molecules of ATP are formed through substrate level phosphorylation during the breakdown of one molecule of glucose in aerobic respiration, then the ratio of ' $X$ ' and ' $Y$ ' is

1

3 : 1

2

5 : 2

3

1 : 1

4

2 : 3

Explanation:

A In the photosynthesis of $C_{3}$ plants, one molecule of glucose is produced using 6ATP molecules, and 2ATP molecules is produced during the aerobic respiration process when one molecule of glucose is broken down. Hence the ratio of $x$ and $y$ is $3 : 1$ .

AP EAMCET-2010

Photosynthesis in higher plants

238134 Which one is a $C_{4}$ - plant?

1 Papaya

2 Pea

3 Potato

4 Maize/corn

Explanation:

D A Maize/corn $C_{4}$ plant that utilizes the $C_{4}$ fixation pathway. This pathway is when the ${CO}_{2}$ is first bound to phosphoenol pyruvate in the mesophyll cell. Example of $C_{4}$ plants are sugar cane, maize/corn etc. $C_{4}$ plants are well adapted to habitats with high day time temperature, intense sunlight, low water condition.

AIPMT-1993

Photosynthesis in higher plants

238135 In $C_{4}$ plants, Calvin cycle operates in

1 stroma of bundle sheath chloroplasts

2 grana of bundle sheath chloroplasts

3 grana of mesophyll chloroplasts

4 stroma of mesophyll chloroplasts

AIPMT-1989

Photosynthesis in higher plants

238136 $C_{4}$ plants can absorb ${CO}_{2}$ from

1 Its much low concentration

2 Its much high concentration

3 Carbonates

4 Bicarbonates

Explanation:

A The enzyme PEP carboxylase present in $C_{4}$ plants is very sensitive to ${CO}_{2}$ that is why $C_{4}$ plant can absorb ${CO}_{2}$ even from its much low concentration. An increase in the concentration of ${CO}_{2}$ increase the rate of photosynthesis.

CMC Vellore-2007

Photosynthesis in higher plants

238124 Which of the following characteristics out of $I$ , II and III are exhibited by $C_{4}$ plants?
I. Kranz anatomy.
II. The product of photosynthesis is oxalo acetic acid.
III. Both PEP carboxylase and ribulose-bis phosphate carboxylase act as carboxylating enzyme.
Choose the correct option:

1 I and II, but not III

2 II and III but not I

3 I and III, but not II

4 All of these

Explanation:

D $C_{4}$ plants have an alternative ${CO}_{2}$ fixation pathway called the Hatch and Slack cycle where OAA is the first stable product. The leaf of these plants has kranz anatomy where the vascular bundles are surrounded by the bundle sheath. Here, two carboxylation reactions take place, first by PEP carboxylase in the mesophyll chloroplast and second by RuBisCO in the bundle sheath chloroplast.

JIPMER-2015

Photosynthesis in higher plants

238125 If ' $X$ ' molecules of ATP are utilised to produce one molecule of glucose during photosynthesis of a $C_{3}$ -plant and ' $Y$ ' molecules of ATP are formed through substrate level phosphorylation during the breakdown of one molecule of glucose in aerobic respiration, then the ratio of ' $X$ ' and ' $Y$ ' is

1

3 : 1

2

5 : 2

3

1 : 1

4

2 : 3

Explanation:

A In the photosynthesis of $C_{3}$ plants, one molecule of glucose is produced using 6ATP molecules, and 2ATP molecules is produced during the aerobic respiration process when one molecule of glucose is broken down. Hence the ratio of $x$ and $y$ is $3 : 1$ .

AP EAMCET-2010

Photosynthesis in higher plants

238134 Which one is a $C_{4}$ - plant?

1 Papaya

2 Pea

3 Potato

4 Maize/corn

Explanation:

D A Maize/corn $C_{4}$ plant that utilizes the $C_{4}$ fixation pathway. This pathway is when the ${CO}_{2}$ is first bound to phosphoenol pyruvate in the mesophyll cell. Example of $C_{4}$ plants are sugar cane, maize/corn etc. $C_{4}$ plants are well adapted to habitats with high day time temperature, intense sunlight, low water condition.

AIPMT-1993

Photosynthesis in higher plants

238135 In $C_{4}$ plants, Calvin cycle operates in

1 stroma of bundle sheath chloroplasts

2 grana of bundle sheath chloroplasts

3 grana of mesophyll chloroplasts

4 stroma of mesophyll chloroplasts

AIPMT-1989

Photosynthesis in higher plants

238136 $C_{4}$ plants can absorb ${CO}_{2}$ from

1 Its much low concentration

2 Its much high concentration

3 Carbonates

4 Bicarbonates

Explanation:

A The enzyme PEP carboxylase present in $C_{4}$ plants is very sensitive to ${CO}_{2}$ that is why $C_{4}$ plant can absorb ${CO}_{2}$ even from its much low concentration. An increase in the concentration of ${CO}_{2}$ increase the rate of photosynthesis.

CMC Vellore-2007