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Standard XII
Biology
Amino Acids
Question

Why are proteins considered to be heteropolymers?

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Solution
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A polymer is a giant molecule made up of many smaller molecules called
monomers. If all the monomers are identical the polymer is a homopolymer.
For example starch is made solely of glucose molecules so starch is a homopolymer. If the monomers are not identical the polymer is heteropolymer . Proteins are made up of up to 20 different amino acids, so proteins are heteropolymers.

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Q1
Why are proteins considered to be heteropolymers?
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Q2
Assertion :A protein is a heteropolymer. Reason: Dietary proteins are the source of non- essential amino acids.
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Q3
A homopolymer has only one type of building block called monomer repeated 'n' number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers usually made of:
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A homopolymer has only one type of building block called a monomer repeated 'n' number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers made of amino acids. While a nucleic acid like DNA or RNA is made of only 4 types of nucleotide monomers, proteins are made of


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Q5

A homopolymer has only one type of building block called monomer repeated 'n' number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers usually made of

(a) 20 types of monomers (b) 40 types of monomers

(c) 30 types of monomers (d) only one type of monomer

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