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To Study Chlorophyll is Necessary for Photosynthesis Video Lecture | Science Class 7 (Old NCERT)
FAQs on To Study Chlorophyll is Necessary for Photosynthesis Video Lecture - Science Class 7 (Old NCERT)
| 1. Why is chlorophyll necessary for photosynthesis? |  |
Ans. Chlorophyll is necessary for photosynthesis because it is the pigment that captures light energy from the sun. This light energy is then used to convert carbon dioxide and water into glucose (sugar) and oxygen, which are essential for the plant's survival.
| 2. How does chlorophyll capture light energy? | |
Ans. Chlorophyll molecules contain a structure called a chromophore, which is responsible for absorbing light. When light hits chlorophyll, the chromophore absorbs certain wavelengths of light, particularly in the red and blue regions of the spectrum. This absorbed light energy is then used in the photosynthetic process.
| 3. Can photosynthesis occur without chlorophyll? | |
Ans. No, photosynthesis cannot occur without chlorophyll. Chlorophyll is the primary pigment involved in capturing light energy for photosynthesis. While other pigments, such as carotenoids, can also absorb light, they do not play the same central role as chlorophyll in the photosynthetic process.
| 4. What happens if a plant lacks chlorophyll? | |
Ans. If a plant lacks chlorophyll, it will not be able to carry out photosynthesis effectively. Without chlorophyll, the plant will not be able to capture light energy and convert it into chemical energy in the form of glucose. This will result in the plant being unable to produce its own food and eventually lead to its death.
| 5. Are there any organisms that do not require chlorophyll for photosynthesis? | |
Ans. Yes, there are some organisms, such as certain bacteria and algae, that can carry out photosynthesis without chlorophyll. These organisms use different pigments, such as bacteriochlorophyll or phycobilins, to capture light energy. However, it is important to note that chlorophyll is the most common and efficient pigment used in photosynthesis by the majority of plants and algae.
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