Advertisements
Advertisements
प्रश्न
How would you test the presence of starch in leaves?
Advertisements
उत्तर
Experiment to test the presence of starch in leaves:
- Take two healthy green potted plants of the same type.
- Keep one potted plant in a dark room for one or two days in order to remove all the starch from the leaves.
- Keep the other plant in sunlight.
- Now, take one leaf from each potted plant and put a few drops of iodine solution on them.
- Note down the change in the colour of both the leaves.
- Observation: No blue-black colour will be observed on the leaves of the plant kept in the dark room. This indicates the absence of starch. Blue-black colour will be observed on the leaves of the plant kept in sunlight. This indicates the presence of starch.
- Concept insight: Plants prepare glucose during photosynthesis which gets stored in plants in the form of starch. Iodine turns blue-black when reacted with starch.
APPEARS IN
संबंधित प्रश्न
In the food pyramid, cereals are given the maximum space because they fulfill our ______ requirement.
Classify according to food-type.
Tiger
Classify according to food-type.
Vulture
Classify according to food-type.
Buffalo
Very Short Answer Type Questions:
Name two sources of proteins provided by animals.
Very Short Answer Type Questions:
Write two sources of Vitamin B.
Short Answer Type Questions:
Name the vitamin that our body prepares in the presence of sunlight.
The nutrient required in trace amounts to accomplish various body functions is ______.
When we observe the lower surface of a leaf through a magnifying lens we see numerous small openings. Which of the following is the term given to such openings?
Paheli and Boojho peeled some potatoes and cut them into small pieces. They washed and boiled them in water. They threw away the excess water and fried them in oil adding salt and spices. Although the potato dish tasted very good, its nutrient value was less. Suggest a method of cooking potatoes that will not lower the nutrients in them.
