Advertisements
Advertisements
Question
Onion cells have no chloroplast. How can we tell they are plants?
Short/Brief Note
Advertisements
Solution
- The bulb of an onion is a modified form of leaves.
- While photosynthesis takes place in the leaves (present above the ground) of an onion containing chloroplast, the little glucose that is produced from this process is converted into starch (starch granules) and stored in the bulb.
- Starch act as reserved food material in plants.
- Using an iodine solution, we can test for the presence of starch in onion cells. If starch is present, the iodine changes from brown to blue-black or purple. Hence, we can say that though onion cells have no chloroplast they are considered as plants.
shaalaa.com
Components of Eukaryotic Cell
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Mitochondria DNA is ______.
Choose the correct option.
Golgi body is absent in
Answer the following question.
Plants have no circulatory system? Then how cells manage intercellular transport?
How cytoplasm differs from nucleoplasm in chemical composition?
Answer the following question.
Mitochondria are power house of the cell. Give reasons.
Label the diagram and write down the detail of the concept in your word.
Label the diagram and write down the detail of the concept in your word.
Label the diagram and write down the detail of concept in your word.
Complete the flow chart.
Identify cell structure or organelle from it's the description below.
Carrys out photosynthesis
