Carbohydrates are commonly found as starch in plants storage organs. Which of the following five properties of starch make it useful as a storage material? (1) Easily translocated (2) Chemically nonreactive (3) Easily digested by animals (4) Osmotically inactive (5) Synthesized during photosynthesis The useful properties are?
Correct answer: D. (2) and (4)
- A. (1), (3) and (5)
- B. (1) and (5)
- C. (2) and (3)
- D. (2) and (4)
Explanation
Starch is the major storage carbohydrate of plants. In most plant species it is accumulated in the chloroplast of leaves, whereas in storage organs it accumulates in the amyloplast as reserve starch. It is the osmotically inactive form of photosynthetic product and is a hexosan polysaccharide made of a large number of glucose units so it is chemically non-reactive.
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