MCQ
Identify the plant parts whose transverse section shows a clear and prominent pith.
- ADicot and monocot stems
- ✓Dicot stem and monocot root
- CDicot and monocot roots
- DDicot stem and dicot root
✓
Answer
Correct option: B.
Dicot stem and monocot root
b
A thin-walled pith is generally present in monocot roots, while in dicot roots, a thin-walled conjunctive tissue is present in between vascular elements. Thinwalled pith is also well marked in dicot stems but absent in monocot stems.
A thin-walled pith is generally present in monocot roots, while in dicot roots, a thin-walled conjunctive tissue is present in between vascular elements. Thinwalled pith is also well marked in dicot stems but absent in monocot stems.
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Which one of the following are correct ?
(A) Chemiosmosis requires a membrane, a proton pump, a proton gradient and ATPase.
(B) The products of light reaction are ATP, NADPH and O2.
(C) The acceptor molecule of CO2in dark reaction is a 5-C aldehyde sugar – RuBP
(D) The fixations of 6 molecules of CO2 and 6 turns of the cycle are required for the removal of one molecule of glucose from the calvin cycle pathway.
(E) For every CO2 molecule entering the calvin cycle, 2 molecules of ATP and 2 of NADPH are required.
(F) C4 plants have a special type of leaf anatomy, tolerate higher temperatures and lack process of photorespiration and have greater productivity of biomass.
(G) Small cells around the vascular bundles of the C4 pathway plants are called bundles sheath cells and the leaves which have such anatomy are said to have kranz anatomy.
(H) ‘Kranz’ means wreath and is a reflection of the arrangement of cells.
(I) C4 pathway has been named Hatch and Slack pathway.
(J) In C4 plants, the primary CO2 acceptor is a 3-C molecule PEP and is present in the bundle sheath cells.
(K) In C4 plants, mesophyll cells lack RuBisCO enzyme. The C4 acid OAA is formed in mesophyll cells.
Choose the correct option given below :-
(A) Chemiosmosis requires a membrane, a proton pump, a proton gradient and ATPase.
(B) The products of light reaction are ATP, NADPH and O2.
(C) The acceptor molecule of CO2in dark reaction is a 5-C aldehyde sugar – RuBP
(D) The fixations of 6 molecules of CO2 and 6 turns of the cycle are required for the removal of one molecule of glucose from the calvin cycle pathway.
(E) For every CO2 molecule entering the calvin cycle, 2 molecules of ATP and 2 of NADPH are required.
(F) C4 plants have a special type of leaf anatomy, tolerate higher temperatures and lack process of photorespiration and have greater productivity of biomass.
(G) Small cells around the vascular bundles of the C4 pathway plants are called bundles sheath cells and the leaves which have such anatomy are said to have kranz anatomy.
(H) ‘Kranz’ means wreath and is a reflection of the arrangement of cells.
(I) C4 pathway has been named Hatch and Slack pathway.
(J) In C4 plants, the primary CO2 acceptor is a 3-C molecule PEP and is present in the bundle sheath cells.
(K) In C4 plants, mesophyll cells lack RuBisCO enzyme. The C4 acid OAA is formed in mesophyll cells.
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