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Assignment for Class 12 Chemistry Unit 14 Biomolecules
Class 12 Chemistry students should refer to the following printable assignment in Pdf for Unit 14 Biomolecules in Class 12. This test paper with questions and answers for Class 12 Chemistry will be very useful for exams and help you to score good marks
Unit 14 Biomolecules Class 12 Chemistry Assignment
ANS: Amylose and Amylopectin
ANS: Deoxyribonuclic acid and Ribonuclic acid.
12.What are Zwitter ions?
ANS: A Zwitter ion is a dipolar ion formed by neutralisation of acidic and basic centers present within the molecule .
13.What is non reducing sugar? Give example.
ANS: The groups like CHO, - C= O, which are not freely available in the molecule do not answer tollens or fehlings test are called non reducing sugar. E.g. maltose and lactose
14.Define mutarotation? Give example.
ANS: The anomers of glucose i. e. alpha and beta are having specific rotation of + 111 0Cand
+ 19.20Crespectively. The mixtures of these two have a rotation of +52.40 C. this is called a mutarotation.
15.Amino acids are amphoteric in behavior? Explain.
ANS: they form zwitterion(dipolar ion) and behave as neutral molecule at pH 7(isoelectric point)
Level Two Questions
1.Define native state and denaturation of protein.
What happens when:
a. Protein is cooled to zero degree C?
b. Protein is heated to 800 C
ANS: protein in the native state has definite configuration and biological activity. The higher structure of protein is affected without disturbing the primary structure is called denaturation.
a. no change
b.the coagulation of the protein takes place.
2. Which forces are responsible for stability of alpha Helix of protein? Why it is called 3.613 helix?
A: Hbonding. It has 3.6 amino acids in one single turn,and a 13 member ring is formed by H bonding.
3. What are essential amino acids? Give example and what happens when it is polymerized?
ANS: amino acids required by the body and cannot be synthesized in our body are called essential amino acids. e.g. Lysine. When it is polymerized polypeptide chains are formed.
4. Glucose and sucrose are soluble in water but Cyclohexane and benzene are not soluble. Why?
ANS: Glucose and sucrose form H bonding with water
5.(i) Write the sequence of base on mRNA molecule synthesized on the following strand of DNA: TATCTACCTGGA
ANS: AUAGAUGGACCU
(ii)Name a powerful antioxidant which is a water soluble vitamin. A: Vitamin C
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CBSE Class 12 Chemistry Unit 14 Biomolecules Assignment
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Assignment for Chemistry CBSE Class 12 Unit 14 Biomolecules
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Unit 14 Biomolecules Assignment Chemistry CBSE Class 12
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Unit 14 Biomolecules Assignment CBSE Class 12 Chemistry
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CBSE Chemistry Class 12 Unit 14 Biomolecules Assignment
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