Explain the role of RNA in protein synthesis in a cell. from Ch

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 Multiple Choice QuestionsShort Answer Type

161.

Which forces are responsible for the stability of α-helix? Why is it named as 3.6 helix?

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162.

Answer the following queries about proteins:
How are proteins related to amino acids?

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163.

Answer the following query about proteins:
How are oligopeptides different from polypeptides?

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164.

Answer the following query about proteins:
When is a protein said to be denatured?

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165.

What is mutation? What are the consequences of mutation?

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166.

Explain the role of RNA in protein synthesis in a cell.


Protein synthesis takes place in the cytoplasm and for this various types of RNA molecules are involved in it. Protein synthesis is a fast process; and about 20 amino acids are added in one second. During protein synthesis, amino acids are linked together by covalent bonds between the carbonyl groups of one and the amino group of next amino acid. In this way a polypeptide chain is formed; and a protein may be formed of many polypeptide chains.
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 Multiple Choice QuestionsLong Answer Type

167.

Describe briefly the following:
(i) Transcription   (ii) Translation.

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168. What reaction is involved in the formation of disaccharides from monosaccharides ? Give the chemical reaction.
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169.

Define the following terms: (i) Gene, (ii) Genetic code, (iii) Transcription, (iv) Translation, (v) Codon.

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 Multiple Choice QuestionsShort Answer Type

170.

List three functions of the nucleotides in a cell.

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