Q: Kranz anatomy is one of the characteristics of the leaves of

Kranz anatomy occurs in the chloroplast of C\$_4\$ plants such as sugarcane, maize (Zea mays), sorghum etc. It has two types of photosynthetic cell arranged in a specific manner. These are bundle sheath cells that surround the vascular centres, and mesophyll cells that, in turn, surround the bundle sheath cells. Rubisco is localised only within internalised bundle sheath cells which helps in fixation of carbon dioxide.So, the correct answer is option D.

Q: A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rate of photosynthesis at high temperature and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

In C\$_4\$ plants, chloroplasts exist not only in the mesophyll cells in the outer part of their leaves but in the bundle sheath cells as well. Instead of direct fixation to RuBisCO in the Calvin cycle, CO\$_2\$ is incorporated into a 4-carbon organic acid, which has the ability to regenerate CO\$_2\$ in the chloroplasts of the bundle sheath cells. C\$_4\$ plants have a competitive advantage over plants possessing the more common C\$_3\$ carbon fixation pathway under conditions of drought, high temperatures, and nitrogen or CO\$_2\$ limitation. This increased water use efficiency of C\$_4\$ grasses means that soil moisture is conserved, allowing them to grow for longer in arid environments.

Question 1

Kranz anatomy is one of the characteristics of the leaves of

Accepted Answer

Kranz anatomy occurs in the chloroplast of C$_4$ plants such as sugarcane, maize (Zea mays), sorghum etc. It has two types of photosynthetic cell arranged in a specific manner. These are bundle sheath cells that surround the vascular centres, and mesophyll cells that, in turn, surround the bundle sheath cells. Rubisco is localised only within internalised bundle sheath cells which helps in fixation of carbon dioxide.So, the correct answer is option D.

Question 2

In Kranz anatomy, the bundle sheath cells have

Accepted Answer

Correct Option: BExplanation:Kranz anatomy is a specialized structure in C4 Plants where the mesophyll cells are clustered around the bundle-sheath cells in a ring-like fashion. The number of chloroplasts in the bundle-sheath cells is more than that in the mesophyll cells.In this type of anatomy the bundle sheath cells form several layers around the vascular bundles; they are characterized by having a large number of chloroplasts, thick walls impervious to gaseous exchange and no intercellular spaces.

Question 3

A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rate of photosynthesis at high temperature and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

Accepted Answer

In C$_4$ plants, chloroplasts exist not only in the mesophyll cells in the outer part of their leaves but in the bundle sheath cells as well. Instead of direct fixation to RuBisCO in the Calvin cycle, CO$_2$ is incorporated into a 4-carbon organic acid, which has the ability to regenerate CO$_2$ in the chloroplasts of the bundle sheath cells. C$_4$ plants have a competitive advantage over plants possessing the more common C$_3$ carbon fixation pathway under conditions of drought, high temperatures, and nitrogen or CO$_2$ limitation. This increased water use efficiency of C$_4$ grasses means that soil moisture is conserved, allowing them to grow for longer in arid environments.

Photosynthesis In Higher Plants

Biology
9582 Views

Kranz anatomy is one of the characteristics of the leaves of

In Kranz anatomy, the bundle sheath cells have

A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rate of photosynthesis at high temperature and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

Photosynthesis In Higher Plants

Biology 9582 Views

Kranz anatomy is one of the characteristics of the leaves of

In Kranz anatomy, the bundle sheath cells have

A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rate of photosynthesis at high temperature and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

Biology
9582 Views