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Karnataka PUC II Amines and Biomolecules — practice questions — page 4

Explore 201 free Amines and Biomolecules questions in Karnataka PUC II Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Amines and Biomolecules questions and exercises with answers

Showing questions 91–120 of 201.

The alpha helix and the beta pleated sheet belong to which level?Read the answer and worked solution →The arrangement of sub-units in a protein is its:Read the answer and worked solution →On denaturation a protein loses which structures?Read the answer and worked solution →The coagulation of egg white on boiling is an example of:Read the answer and worked solution →Almost all enzymes are which kind of protein?Read the answer and worked solution →The name of an enzyme almost always ends in:Read the answer and worked solution →Enzymes speed a reaction by lowering its:Read the answer and worked solution →Which set of vitamins is fat soluble?Read the answer and worked solution →Water soluble vitamins must be eaten regularly because they are:Read the answer and worked solution →The sugar found in a DNA molecule is:Read the answer and worked solution →Which base occurs in RNA but not in DNA?Read the answer and worked solution →A base attached to a sugar without phosphate is called a:Read the answer and worked solution →Nucleotides in a chain are joined by which linkage?Read the answer and worked solution →In the DNA double helix adenine pairs with:Read the answer and worked solution →Aniline heated with sulphuric acid finally yields:Read the answer and worked solution →The chief drawback of ammonolysis is that it yields a:Read the answer and worked solution →In ammonolysis the order of reactivity of alkyl halides is:Read the answer and worked solution →NEET · Chemistry · Carbohydrate FamilyRead the answer and worked solution →The alpha helix and the beta pleated sheet belong to which level?Read the answer and worked solution →The arrangement of sub-units in a protein is its:Read the answer and worked solution →The name of an enzyme almost always ends in:Read the answer and worked solution →Water soluble vitamins must be eaten regularly because they are:Read the answer and worked solution →The coagulation of egg white on boiling is an example of:Read the answer and worked solution →The sequence of amino acids in a chain is its:Read the answer and worked solution →Two monosaccharides joined through an oxygen atom share a:Read the answer and worked solution →Sucrose is a non reducing sugar because both its:Read the answer and worked solution →The laevorotatory mixture left after hydrolysing sucrose is called:Read the answer and worked solution →Maltose on hydrolysis gives two units of:Read the answer and worked solution →Cellulose is a straight chain polymer built only from:Read the answer and worked solution →Carbohydrate is stored in the animal body as:Read the answer and worked solution →

Worked practice questions

The alpha helix and the beta pleated sheet belong to which level?

  1. Symmetrical
  2. Sequential
  3. Secondary
  4. Sedimentary
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Correct answer: C. Secondary

1. These arise from regular folding of the backbone. 2. Hydrogen bonds between peptide groups hold them. 3. They are the secondary structure. _Source: syllabus Chemistry Part 2, Unit 10 'Biomolecules'_

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The arrangement of sub-units in a protein is its:

  1. Elementary structure
  2. Stationary structure
  3. Filamentary structure
  4. Quaternary structure
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Correct answer: D. Quaternary structure

1. Some proteins are built of several chains. 2. Each chain is called a sub-unit. 3. How they sit together is the quaternary structure. _Source: syllabus Chemistry Part 2, Unit 10 'Biomolecules'_

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On denaturation a protein loses which structures?

  1. Second and third
  2. First and third
  3. First and second
  4. First and fourth
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Correct answer: A. Second and third

1. Heat or a pH change breaks the hydrogen bonds. 2. The helix uncoils and the globule unfolds. 3. Secondary and tertiary go, but primary survives. _Source: syllabus Chemistry Part 2, Unit 10 'Biomolecules'_

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