What are reducing and non-reducing sugars? What is the structura

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 Multiple Choice QuestionsShort Answer Type

151.

How are glucose molecules joined together to make starch, glycogen and cellulose?

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152.

What are reducing and non-reducing sugars? What is the structural feature characterizing reducing sugars ?


Those carbohydrates which contain free aldehyde or ketonic group reduce Fehling’s solutions and Tollen’s reagent are called reducing sugar e.g., monosaccharides like glucose, fructose, galactose are reducing sugars.

Those carbohydrates which do not contain free aldehydes or ketonic group and do not reduce Fehling’s solution and Tollen’s reagent are called non-reducing sugars, e.g., maltose, lactose, sucrose.

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153.

Write the following about protein synthesis:
Name the location where protein synthesis occurs.

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154.

Write the following about protein synthesis:
How do 64 codons code for only 20 amino acids?

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155.

Write the following about protein synthesis:
Which of the two bases of the codon are most important for coding?

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156.

What deficiency diseases are caused due to lack of vitamins A, B, B6 and K in human diet?

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157.

Draw open chain structure of aidopentose and aldohexose. How many asymmetric carbons are present in each?

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158.

Draw simple Fisher projections of D-and L-glucose. Are these enantiomers?

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159.

What type of linkages are responsible for the formation of:
(i)    Primary structure of proteins.
(ii)    Cross linking of polypeptides chains.
(iii)    α-Helix formation
(iv)    β-sheet structure.

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160.

Draw simple Fisher projections or L-galactose and L-mannose.

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