Why do plant cells need chloroplasts? explain.

Plant cells need chloroplast as they are the site for photosynthesis.

Explanation:

The chloroplast is the green-colored double membrane-bound organelles present mostly in cells of leaves of green plants. Chloroplasts have chlorophyll pigments which serve to trap the sunlight for the process of photosynthesis. Both light-dependent and light-independent phases of photosynthesis take place in chloroplast to form organic sugars.

Hence, chloroplasts serve as a site for photosynthesis in plants.  

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

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