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ISC Class 12 Amines and Biomolecules — practice questions — page 3

Explore 108 free Amines and Biomolecules questions in ISC Class 12 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 61–90 of 108.

In the DNA double helix adenine pairs with:Read the answer and worked solution →Which set of vitamins is fat soluble?Read the answer and worked solution →A chain of more than ten amino acids is called a:Read the answer and worked solution →Carbohydrates are also known by which other name?Read the answer and worked solution →Polysaccharides are also called non-sugars because they are not:Read the answer and worked solution →Match each name to the reaction it labelsRead the answer and worked solution →The carbon whose hydroxyl decides alpha or beta glucose is called:Read the answer and worked solution →Amino acids the body cannot make and must eat are called:Read the answer and worked solution →The dipolar ion form of an amino acid is called a:Read the answer and worked solution →Which amino acid is not optically active?Read the answer and worked solution →Most naturally occurring amino acids carry which configuration?Read the answer and worked solution →The bond joining two amino acids in a protein is a:Read the answer and worked solution →Keratin and myosin are examples of which class of protein?Read the answer and worked solution →On denaturation a protein loses which structures?Read the answer and worked solution →Almost all enzymes are which kind of protein?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 →Oligosaccharides give on hydrolysis how many monosaccharide units?Read the answer and worked solution →Sugars that reduce Tollens' reagent are called:Read the answer and worked solution →Glucose is an aldohexose also known as:Read the answer and worked solution →Prolonged heating of glucose with hydrogen iodide gives:Read the answer and worked solution →Glucose pentaacetate shows that glucose carries how many hydroxyls?Read the answer and worked solution →The water soluble component of starch is:Read the answer and worked solution →All proteins are polymers of which kind of amino acid?Read the answer and worked solution →The five membered ring form of fructose is called the:Read the answer and worked solution →Glucose oxidised by bromine water yields:Read the answer and worked solution →NEET · Chemistry · Physisorption or ChemisorptionRead the answer and worked solution →NEET · Chemistry · Addition or Condensation PolymerRead the answer and worked solution →Polythene is best classified as an:Read the answer and worked solution →

Worked practice questions

In the DNA double helix adenine pairs with:

  1. Cytosine
  2. Guanine
  3. Uracil
  4. Thymine
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Correct answer: D. Thymine

1. The two strands are held by hydrogen bonds. 2. Each base pairs with only one partner. 3. Adenine pairs with thymine. _Source: syllabus Chemistry Part 2, Unit 10 'Biomolecules'_

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Which set of vitamins is fat soluble?

  1. B, C, E and K
  2. A, D, E and K
  3. B, C, D and E
  4. A, B, C and D
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Correct answer: B. A, D, E and K

1. Fat soluble vitamins are stored in liver and fat tissue. 2. They do not dissolve in water. 3. They are vitamins A, D, E and K. _Source: syllabus Chemistry Part 2, Unit 10 'Biomolecules'_

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A chain of more than ten amino acids is called a:

  1. Polynucleotide
  2. Polyphosphate
  3. Polypeptide
  4. Polysaccharide
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Correct answer: C. Polypeptide

1. Two amino acids make a dipeptide. 2. Three make a tripeptide, and so on. 3. Past ten the chain is called a polypeptide. _Source: syllabus Chemistry Part 2, Unit 10 'Biomolecules'_

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