Question

Science
Q1. Define Cells, Cell membrane & Cell wall.
Q2. Why is nucleus called the control centre of the cell?
Q3. What is the function of Chromoplast?
Q4. What is the role of Chlorophyll in plants?​

Answer 1

Answer:

1. The cell membrane is a biological membrane that separates the interior of all cells from the outside environment which protects the cell from its environment. The cell membrane consists of a lipid bilayer, including cholesterols that sit between phospholipids to maintain their fluidity at various temperatures.

2.The nucleus is generally considered the control center of the cell because it stores all of the genetic instructions for manufacturing proteins.

3.Chromoplasts function in the synthesis and storage of carotenoid pigments in flowers and fruits, and in certain leaves and roots. The colouration of petals by chromoplasts is an evolutionary strategy adopted by some angiosperms to attract pollinators .

4.Chlorophyll's job in a plant is to absorb light—usually sunlight. ... The process of photosynthesis produces oxygen, which is released by the plant into the air. Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light

Answer 2

Answer:

1. The plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment. In bacterial and plant cells, a cell wall is attached to the plasma membrane on its outside surface.
2. The nucleus is generally considered the control center of the cell because it stores all of the genetic instructions for manufacturing proteins.
3. Chromoplasts function in the synthesis and storage of carotenoid pigments in flowers and fruits, and in certain leaves and roots. The colouration of petals by chromoplasts is an evolutionary strategy adopted by some angiosperms to attract pollinators .
4. Chlorophyll's job in a plant is to absorb light—usually sunlight. ... The process of photosynthesis produces oxygen, which is released by the plant into the air. Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light.