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Chapter 13: Problem 4

Photosynthesis is important because (a) It is the primary source of all food on earth (b) It is responsible for the release of \(\mathrm{O}_{2}\) (c) Both (a) and (b) (d) None of these

Short Answer

Expert verified
The correct answer is (c) Both (a) and (b), as they correctly state the functions of photosynthesis.

Step by step solution

01

Understanding the options

The first step is to understand each of the provided options. \n (a) contends that photosynthesis is the primary source of all food on earth. This is because through photosynthesis, plants convert sunlight, water, and carbon dioxide into glucose (food) and oxygen. \n (b) indicates that photosynthesis is responsible for the release of oxygen (O2). In the photosynthesis process, oxygen is a byproduct released into the atmosphere when water is split to provide electrons to replace the ones lost by chlorophyll.\n (c) includes both (a) and (b).\n (d) says none of the options are correct.
02

Combining the knowledge

Since photosynthesis indeed produces glucose (a form of food for plants) which eventually forms the basis of nutrition for animals and humans, option (a) is correct. Also, indeed oxygen is a byproduct of photosynthesis as water is split in its process, hence option (b) too is correct.
03

Conclusion

Since both options (a) and (b) are correct, therefore the right answer is (c), which includes both.

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Most popular questions from this chapter

Which one of the following is wrong in relation to photorespiration? (a) It is a characteristic of \(\mathrm{C}_{3}\) plants (b) It occurs in chloroplasts (c) It occurs in day time only (d) It is a characteristic of \(\mathrm{C}_{4}\) plants

Which of the following is correct about light reaction? (a) Light is required (b) ATP is produced during reaction (c) NADPH is produced during reaction (d) All of these

Where water splitting complex associated with PS II is situated? (a) Inner side of chloroplast outer membrane (b) Inner side of thylakoid membrane (c) Outer side of thylakoid membrane (d) Inner side of chloroplast outer membrane

The correct equation of photosynthesis is (a) \(\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O} \stackrel{\text { Light }}{\longrightarrow}\left[\mathrm{CH}_{2} \mathrm{O}\right]+\mathrm{O}_{2}\) (b) \(2 \mathrm{H}_{2} \mathrm{~A}+\mathrm{CO}_{2} \stackrel{\text { Light }}{\longrightarrow} 2 \mathrm{~A}+\mathrm{CH}_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{O}\) (c) \(6 \mathrm{CO}_{2}+12 \mathrm{H}_{2} \mathrm{O} \stackrel{\text { Light }}{\longrightarrow} \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{H}_{2} \mathrm{O}+6 \mathrm{O}_{2}\) (d) \(6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O}\) Light \(\longrightarrow \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2}\)

Within chloroplast, the membranous system is made up of (a) Grana (b) Stroma lamellae (c) Stroma (d) Both (a) and (b)
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