Question

A scientist who worked on a single celled green plant (an alga) treated it with ultraviolet rays and produced mutant cells that did not contain chloroplasts. To keep these cells alive, the scientist had to a) provide them with high light intensity b) keep them in the dark c) provide them with a sugar solution d) give them chlorophyll

Answer 1

provide them with a sugar solution because in absence of chloroplasts with chlorophyll, the plant will not synthesise food and eventually die if not given artificial sugar solution

Answer 2

Question :

Choose the correct option :

A scientist who worked on a single celled green plant (an alga) treated it with ultraviolet rays and produced mutant cells that did not contain chloroplasts. To keep these cells alive, the scientist had to

a) provide them with high light intensity

b) keep them in the dark

c) provide them with a sugar solution

d) give them chlorophyll

Answer :

Option d.give them chlorophyll is correct.

A scientist who worked on a single celled green plant (an alga) treated it with ultraviolet rays and produced mutant cells that did not contain chloroplasts. To keep these cells alive, the scientist had to give them chlorophyll.

• We know that mutant cells do not contain chloroplasts.
• Also, chloroplasts contain the pigment chlorophyll (which is reason of the green color of leaves of plant).
• Chlorophyll is also required for the process of photosynthesis ( the process of plants of preparing their own food in the presence of sunlight ).
• Hence, Chlorophyll is required to keep these cells alive .

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