Biology
Complete the following by filling the blanks 1 to 5 with appropriate words/ terms/ phrases:
To test the leaf for starch, the leaf is boiled in water to (1) …………… . It is next boiled in methylated spirit to (2) …………… . The leaf is placed in warm water to soften it. It is then placed in a dish and (3) ………… solution is added. The region, which contains starch, turns (4) …………… and the region, which does not contain starch, turns (5) ……………… .
Answer
To test the leaf for starch, the leaf is boiled in water to (1) kill the cells. It is next boiled in methylated spirit to (2) remove chlorophyll. The leaf is placed in warm water to soften it. It is then placed in a dish and (3) iodine solution is added. The region, which contains starch, turns (4) blue-black and the region, which does not contain starch, turns (5) brown.
Related Questions
Name these :
(a) Two aquatic plants which can be used for the experiment of photosynthesis.
(b) Two plants having variegated leaves.
(c) Two raw materials for photosynthesis.
(d) Four essentials for photosynthesis.
(e) Two main phases of photosynthesis.
Match the terms given in column A with column B:
Column A Column B Chlorophyll Removes/absorbs CO2 Methylated spirit Tests presence of starch Potassium hydroxide Traps solar energy Iodine solution Produces oxygen Water Bleaches chlorophyll Write the exact location of each :
(a) Chlorophyll
(b) Chloroplast in the parts of a plant
(c) Stroma
(d) Guard cells
(e) Palisade cells
Define the following terms:
(a) Photosynthesis
(b) Thylakoids
(c) Chloroplast
(d) Photolysis of water
(e) Polymerisation