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Read the given statements and select the correct option.
i. Right end of a polysaccharide chain is called reducing end while left end is called non-reducing end.
ii. Starch can hold iodine molecules in its helical secondary structure but cellulose being non-helical, cannot hold iodine.
iii. Starch and glycogen are branched molecules.
iv. Starch and glycogen are the reserve food materials of plants and animals, respectively.
  • a)
    Statements (i) and (ii) are correct
  • b)
    Statements (ii) and (iii) are correct
  • c)
    Only statement (iv) is correct
  • d)
    All statements are correct
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Read the given statements and select the correct option.i. Right end o...
(i) The right end of the polysaccharide chain which has a free reactive end and is known as reducing and left side is the non-reducing end.
Starch is a polymer of glucose that is made up of two types of chains amylose and amylopectin.
(ii) Amylose is a straight polymer with 1-4 glycosidic linkages and amylopectin is a branched polymer with 1-6 glycosidic linkage.
(iii) Starch can hold iodine molecule in the amylopectin helical structure. Starch is the reserve food material in plants. Glycogen is also a storage food material in animals. It is also branched structure, a polymer of glucose which has linear 1-4 glycosidic bonds and branched 1-6 glycosidic linkage.
(iv) Cellulose is a linear polymer of Beta D glucose which does not trap iodine molecules.
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Most Upvoted Answer
Read the given statements and select the correct option.i. Right end o...
i. Right end of a polysaccharide chain is called reducing end while left end is called non-reducing end.
The reducing end of a polysaccharide chain refers to the end that has a free aldehyde or ketone group, which can undergo a reducing reaction. This end can reduce other compounds by donating electrons. The non-reducing end, on the other hand, does not have a free aldehyde or ketone group. Therefore, statement (i) is correct.

ii. Starch can hold iodine molecules in its helical secondary structure but cellulose being non-helical, cannot hold iodine.
Iodine molecules can form a complex with starch, resulting in a blue-black color. This is due to the helical structure of starch, which provides sites for iodine molecules to bind. On the other hand, cellulose does not have a helical structure, making it unable to form a complex with iodine. Therefore, statement (ii) is correct.

iii. Starch and glycogen are branched molecules.
Both starch and glycogen are polysaccharides composed of glucose units. They have a similar structure, consisting of linear chains of glucose molecules. However, both starch and glycogen also contain branches, where additional glucose units are attached to the main chain. These branches allow for more efficient storage and breakdown of glucose. Therefore, statement (iii) is correct.

iv. Starch and glycogen are the reserve food materials of plants and animals, respectively.
Starch is the primary reserve food material in plants, while glycogen serves as the main storage carbohydrate in animals. Both starch and glycogen are polysaccharides that can be broken down to release glucose when energy is needed. Therefore, statement (iv) is correct.

In conclusion, all the given statements (i, ii, iii, iv) are correct.
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Read the given statements and select the correct option.i. Right end of a polysaccharide chain is called reducing end while left end is called non-reducing end.ii. Starch can hold iodine molecules in its helical secondary structure but cellulose being non-helical, cannot hold iodine.iii. Starch and glycogen are branched molecules.iv. Starch and glycogen are the reserve food materials of plants and animals, respectively.a)Statements (i) and (ii) are correctb)Statements (ii) and (iii) are correctc)Only statement (iv) is correctd)All statements are correctCorrect answer is option 'D'. Can you explain this answer?
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