Question

WHAT IS PHOTOSYNTHESIS​

Answer 1

PHOTOSYNTHESIS IS A PROCESS USED BY PLANTS AND OTHER HER ORGANISM TO CONVERT LIGHT ENERGY INTO CHEMICAL ENERGY THAT , THROUGH CELLULAR RESPIRATION , CAN LATER BE RELEASED TO FUEL THE ORGANISM'S METABOLIC ACTIVITIES

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Answer 2

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Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities.

Where Does This Process Occur?

Chloroplasts are the sites of photosynthesis in plants and blue-green algae. All green parts of a plant, including the green stems, green leaves, and sepals – floral parts comprise of chloroplasts – green colour plastids. These cell organelles are present only in plant cells and are located within the mesophyll cells of leaves.

Factors Affecting Photosynthesis

Photosynthesis process requires several factors such as:

Light Intensity: Increased light intensity results in a higher rate of photosynthesis. On the other hand, low light intensity results in a lower rate of photosynthesis.

The concentration of CO2: Higher concentration of carbon dioxide helps in increasing the rate of photosynthesis. Usually, carbon dioxide in the range of 300 – 400 PPM is adequate for photosynthesis.

Temperature: For efficient execution of photosynthesis, it is important to have a temperature range between 25° to 35° C.

Water: As water is an important factor in photosynthesis, its deficiency can lead to problems in the intake of carbon dioxide. The scarcity of water leads to the refusal of stomatal opening to retain the amount of water they have stored inside.

Pollution: Industrial pollutants and other particulates may settle on the leaf surface. This can block the pores of stomata which makes it difficult to take in carbon dioxide.

Photosynthetic Pigments

There are four different types of pigments present in leaves:

1. Chlorophyll a
2. Chlorophyll b
3. Xanthophylls
4. Carotenoids