JEE Questions for Chemistry Biomolecules Quiz 2 - MCQExams.com

Which one of the following is an example of a non-reducing sugar?
  • Sucrose
  • Lactose
  • Maltose
  • Cellobiose
Methyl α-D-glucoside and methyl- β-D-glucoside are
  • epimers
  • anomers
  • enantiomers
  • conformational diastereomers
Iodine test is shown by
  • glucose
  • starch
  • glycogen
  • polypeptide
Main constituent of plants is
  • cellulose
  • starch
  • fructose
  • lipids
When glucose reacts with bromine water the main product is
  • gluconic acid
  • glyceraldehyde
  • sorbitol
  • saccharic acid
Raffinose is
  • trisaccharide
  • disaccharide
  • monosaccharide
  • polysaccharide
Glucose is a/an
  • polyhydroxy ketone
  • alcohol
  • hydrate of carbon
  • pentahydroxy aldehyde
Lactose gives on hydrolysis
  • glucose
  • glucose and galactose
  • fructose
  • glucose and fructose
All monosaccharides.......... Tollen's reagent.
  • oxidises
  • condense with
  • reduces
  • add to
The two forms of D-glucopyranose obtained from the solution of D-glucose are called
  • isomers
  • anomers
  • epimers
  • enantiomers
Which of the following compounds is found abundantly in nature?
  • Fructose
  • Starch
  • Glucose
  • Cellulose
Water insoluble component of starch is
  • amylopectin
  • amylose
  • cellulose
  • None of these
Ribose is an example of
  • ketohexose
  • disaccharide
  • pentose
  • polysaccharide
Which of the following enzymes hydrolysis starch to glucose?
  • Amylase
  • Invertase
  • Lactase
  • Maltase
Energy is stored in our body in the form of
  • ATP
  • ADP
  • fats
  • carbohydrates
The number of disulphide linkages present in insulin are
  • 1
  • 2
  • 3
  • 4
The number of amino acids and number of peptide bonds in a linear tetrapeptide (made of different amino acids, are respectively
  • 4 and 4
  • 5 and 5
  • 5 and 4
  • 4 and 3
α-helix is found in
  • DNA
  • RNA
  • lipid
  • carbohydrates
  • protein
Dialysis can be used to separate
  • protein and starch
  • glucose and protein
  • glucose and NaCl
  • glucose and fructose
Which of the following is a simplest amino acids?
  • Glycine
  • Alanine
  • Leucine
  • Valine
Which of the following element is present in haemoglobin?
  • Na
  • Ca
  • Fe
  • Au
Hydrolysis of proteins give
  • α-amino acids
  • β-amino acids
  • γ-amino acids
  • mixture of all, i.e. α, βγ-amino acids
In an alkaline medium, glycine predominantly exists as/in a/an
  • cation
  • anion
  • Zwitter ion
  • covalent form
Biuret test is not given by
  • carbohydrates
  • polypeptides
  • urea
  • proteins
Which one of the following is not a protein?
  • Wool
  • Nail
  • Hair
  • DNA
In alkaline medium, alanine exits predominantly as
  • anion
  • Zwitter ion
  • cation
  • covalent form
Which of the following is a heterocyclic amino acid?
  • Glycine
  • Alanine
  • Phenylalanine
  • Tryptophan
Which amino acid has imidazole ring?
  • Alanine
  • Leucine
  • Tyrosine
  • Histidine
Helical structure of protein is stablilised by
  • peptide bond
  • hydrogen bond
  • van der Waals' force
  • dipole association
The α-amino acid which does not give purple colour in the ninhydrin test is
  • proline
  • glycine
  • lysine
  • aspartic acid
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