Biology MCQs Online Quiz Test 17

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Biology Class 9th And 10th Online MCQs Test

Q.1: Which statement is true about an aqueous medium——–?

  1. Ionic as well as non ionic substance in aqueous media retains their identity
  2. Enzymes can not perform catalysis reaction in this medium
  3. Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions
  4. It is less favorable media for chemical reactions


Q.2: Which of the following carbohydrate is tasteless——?

  1. Monosaccharide
  2. Oligosaccharide
  3. Polysaccharide
  4. None of these


Q.3: Which of the statement is not true for compounds like glycoprotein and glycolipids——?

  1. They are conjugated molecules of carbohydrates
  2. Both have role in the extra cellular matrix of animals and bacterial cell wall
  3. They are components of biological membranes.
  4. Both are produced and secreted by endoplasmic reticulum


Q.4: A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called—–?

  1. Lipid
  2. Carbohydrate
  3. Protein
  4. Carotein


Q.5: Specific heat of vaporization of water is——–?

  1. 574 Kcal/kg
  2. 674 Kcal/kg
  3. 774 Kcal/kg
  4. 874 Kcal/kg


Q.6: Cn(H2O)n. is a general formula of——-?

  1. Monosaccharides
  2. Oligosaccharides
  3. Ploysacharides
  4. Carbohydrates


Q.7: Which one are most complex sugar——-?

  1. Monosaccharides
  2. Oligosaccharides
  3. Polysaccharides
  4. None of these


Q.8: Variety among amino acids is produced due to——-?

  1. NH2 group
  2. COOH group
  3. R group
  4. All of these


Q.9: Primary structure of proteins determines—–?

  1. Number of polypeptide chains involved
  2. Bending of polypeptide chains
  3. Amino acid sequence
  4. Coiling of polypeptide chains


Q.10: Ribose is an example of——?

  1. Trioses
  2. Tetroses
  3. Pentose
  4. Hexose