write an experiment to find what effect light has on the formation of starch? in leaves
Answers
Answer:
When you put iodine on the leaves, one of them will turn blue-black and the other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch. The leaf that was in the light turns blue-black, which demonstrates that the leaf has been performing photosynthesis and producing starch.
Answer:
The given experiment proves that for photosynthesis, the presence of sunlight is an important factor which is absorbed by the chlorophyll (green pigment) present in the chloroplast.
The leaf from a potted plant which was kept in a dark room for 24 hours when tested for starch will not turn blue-black (starch is tested with iodine which gives a blue-black colour if present).
This happens because when the potted plant was kept in a dark room (destarch), the plant was unable to prepare its food by photosynthesis.
So, the leaf A will give a negative test for starch.
Variegated leaves are those which have one colour on the inner region of the foliage and another colour along the edges or margin of the leaf.
Example of a plant with a variegated leaf is Cornus alba Elegantissima.The given experiment proves that for photosynthesis, the presence of sunlight is an important factor which is absorbed by the chlorophyll (green pigment) present in the chloroplast.
The leaf from a potted plant which was kept in a dark room for 24 hours when tested for starch will not turn blue-black (starch is tested with iodine which gives a blue-black colour if present).
This happens because when the potted plant was kept in a dark room (destarch), the plant was unable to prepare its food by photosynthesis.
So, the leaf A will give a negative test for starch.
Variegated leaves are those which have one colour on the inner region of the foliage and another colour along the edges or margin of the leaf.
Example of a plant with a variegated leaf is Cornus alba Elegantissima.The given experiment proves that for photosynthesis, the presence of sunlight is an important factor which is absorbed by the chlorophyll (green pigment) present in the chloroplast.
The leaf from a potted plant which was kept in a dark room for 24 hours when tested for starch will not turn blue-black (starch is tested with iodine which gives a blue-black colour if present).
This happens because when the potted plant was kept in a dark room (destarch), the plant was unable to prepare its food by photosynthesis.
So, the leaf A will give a negative test for starch.
Variegated leaves are those which have one colour on the inner region of the foliage and another colour along the edges or margin of the leaf.
Example of a plant with a variegated leaf is Cornus alba Elegantissima.