NURSING EXAM QUESTIONS
NUTRITION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
A student wanted to see if covering a leaf in foil would stop it from producing starch. Why should the student put the plant in a dark cupboard for 48 hours before returning it to the light and starting the experiment?
|
|
To make the results reliable
|
|
|
So that the plant would photosynthesise faster when returned to the light
|
|
|
So that any starch already in the leaf was used up by the plant
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -The plant is kept in the dark for 24-48 hrs. During this time, photosynthesis is halted due to an absence of light. Therefore production of new starch is also stopped. The stored starch is used up by the plant for other activities like respiration, transportation etc.
Detailed explanation-2: -Starch is a stored form of glucose in plants. Before experimenting on photosynthesis, the plant is kept in the dark for some hours to remove starch from the experimental leaf.
There is 1 question to complete.