The maintenance functions of all living organisms must go on even when they are not doing anything particular. Even when we are just sitting in a class or even asleep, this maintenance job has to go on. These maintenance processes require energy to prevent damage and break-down of cells and tissues, which is obtained by the individual organism from the food prepared by the autotrophs, called producers.
Read the passage carefully and answer the questions that follow.
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I notice sub-question (c) is incomplete — no actual question is stated under it. I will answer (a) and (b) fully, and note the issue for (c).
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Model Answer
(a) The process is Photosynthesis.
It is the process by which green plants (autotrophs) use sunlight, carbon dioxide, and water to prepare food (glucose) in the presence of chlorophyll.
(b) Chemical equation for photosynthesis:
$$6CO_2 + 6H_2O \xrightarrow{\text{Sunlight, Chlorophyll}} C_6H_{12}O_6 + 6O_2$$
(c) The sub-question (c) appears to be incomplete/missing in the paper as provided — no question text follows "Answer the following." Please check the original question paper and re-submit the missing part so it can be answered correctly.
Source: Life Processes, Chapter 6 (Class 10 Science, NCERT)
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Explanation
- (a) Examiners want the name + one-line definition of photosynthesis. Mention raw materials (CO₂, H₂O), energy source (sunlight), and site (chlorophyll).
- (b) Write the balanced chemical equation with reactants, products, and conditions (sunlight/chlorophyll) shown above the arrow. Losing the balance or omitting conditions costs marks.
- (c) Since the question text is missing, no answer can be given. In an exam, if a question is partially printed, inform the invigilator — never leave it blank without attempting what is visible.