Reduction of carbondioxide to carbohydrates occurs during
digestion
respiration
photosynthesis
excretion
________ molecules are located in the thylakoid membrane.
Xanthophyll
Phaeophytin
Rhodophytin
Chlorophyll
CO2 enters through stomata into the cells by ___________.
Imbibition
Plasmolysis
Diffusion
None of these
Intact structure of ___________ is required for glucose to be formed.
Tonoplast
Leukoplast
Chloroplast
None
In submerged plants like Hydrilla carbondioxide diffuses directly through
Cuticle
Epidermis
Stomata
Transpiration has been described as a necessary evil because it is inevitable, but potentially harmful. Which of the following are the after-effects of transpiration ?i) Absorption of mineral salts.ii) Regulation of plant temperature.iii) Wilting and injury in plants.iv) Ascent of sap.
i & iv
i,ii & iii
i,ii & iv
All of these
Given below are the events of photosynthesis. Identify which of the following is/are not correct ?a) Absorption of light energy by chlorophyll.b) Conversion of light energy to chemical energy and splitting of carbon dioxide into carbohydrates and oxygen.c) Reduction of carbon dioxide to carbohydrates.d) Conversion of chemical energy to radiant energy and splitting of water molecules into hydrogen and oxygen.
a & b
b only
b and c
b and d
The gas which is given off by chloroplasts in the Sunlight is
Oxygen
Water
Carbon dioxide
A ____________ is a disc shaped membrane sac present in the granum of chloroplast.
Xylem
Phloem
Thylakoid
Stoma
The autotrophic mode of nutrition requires
carbon dioxide and water
chlorophyll
sunlight
all of the above