A certain compound gives negative test with ninhydrin and positive test with Benedicts solution. The compound is
1.A protein
2.A monosaccharide
3.A lipid
4.An amino acid.
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A nucleoside is made up of a
1.base and sugar
2.base and phosphoric acid
3.sugar and phosphoric acid
4.sugar, a base and phosphoric acid.
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A pyranose ring consists of a skeleton of
1.5 carbon atoms and one oxygen atom
2.6 carbon atoms
3.6 carbon atoms and one oxygen atom
4.4 carbon atoms and one oxygen atom.
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A sucrose molecule on hydrolysis yields
1.Gloucose
2.Fructose
3.Glucose and fructose
4.Glucose and galactose.
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Adenosine monophosphate (AMP) is a/an
1.nucleotide
2.nucleoside
3.enzyme
4.nucleic acid.
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Amino acids are formed on hydrolysis of
1.Fats
2.Proteins
3.Nucleic acids
4.Carbohydrates.
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An example of zwitter ion is
1.Glucine hydrochloride
2.Ammonium acetate
3.Aniline
4.Alanine.
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At isoelectric point, the amino acid has
1.Least viscosity
2.Maximum surface tension
3.Maximum solubility
4.All of the above.
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ATP represents
1.abnormal temperature ande pressure
2.atmospheric temperature
3.adenosine triphosphate
4.None of these.
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Biochemical reactions which require oxygen are called
1.Metabolic
2.both synthesis as well as
3.Anaerobic
4. No specific name.
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Biuret test is used for the detection of
1.Sugars Proteins
2.Proteins
3.Fats
4.Starch.
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Catabolism refers to
1.breakdown of complex molecules in living organisms
2.synthesis of complex molecules
3. breakdown of complex molecules
4.None of these.
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Chhse is an example of
1.Denaturede protein
2.Derived protein
3.Conjugated protein
4.Globular protein.
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Classification of proteins into fibrous and globular forms is on the basis of
1.Primary structure
2. Secondary structure
3.Tertiary structure
4.Quarternary structure.
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Denaturation of protein does not have any effect on its
1.Secondary structure
2.Tertiary structure
3.Quaternary structure
4.Primary structure.
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Digestion of carbohydrates mainly takes place in
1.Stomach
2.Small intestine
3.Large intestine
4.Mouth.
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Digestion of lipids occurs primarily in
1.Stomach
2.Small intestine
3.Mouth
4.Large intestine.
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During digestion which enzyme converts peptides into amino acids
1.Peptidase
2.Invertase
3.Lipase
4.Maltsae
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During glycolysis one molecule of glucose breaks into
1.Two molecules of acetic acid
2.Three molecules of acetic acid
3.Two molecules of pyruvic acid
4.Three molecules of pyruvic acid.
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Enzymes are
1.Steroids
2.Proteins
3.Fatty acids
4.Nucleic acids.
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Fructose has
1.Bitter taste
2.Sweet taste
3.Tasteless
4.Salty taste.
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Glucose and fructose are
1.Isomers of each other
2.Homologues of each other
3.Anomers of each other
4.Enantiomers of each other.
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Glucose cannot be classified as
1.Hexose
2.Carbohydrate
3.Aldose
4.Oligosaccharide.
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Glucose gives silver mirror with Tollens reagent. It shows the presence of a/an
1.Alcoholic group
2.Keto group
3.Aldehydic group
4.Acidic group.
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Glucose on oxidation with bromine water gives
1.Glyceric acid
2.Gluconic acid
3.Saccharic acid
4.Pyruvic acid.
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Glucose on oxidation with nitric acid yields
1.Giucaric acid
2.Gluconic acid
3.Oxalic acid
4.Sorbitol.
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Glucose on reaction with excess phenylhydrazine gives glucosazone. In this reaction one molecule of glucose reacts with_______ molecules of phenylhydrazine.
1.Two
2.Three
3.Four
4.Six.
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Glycoside linkage is an
1.amide linkage
2.ether linkage
3.ester linkage
4.None of these.
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Glycylalanine and alanylglycine are
1.Stereosisomers
2.Structural isomers
3.Diastereomers
4.Identical.
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Gums and pectins are examples of .
1.Protiens
2.Lipids
3.Enzymes
4.Polysaccharides
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he sweetest carbohydrate is .
1.Sucrose.
2.Glucose
3.Fructose
4.Saccharine
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Hydrolysis of sucrose into (+) glucose and (-) fructose is known as
1.Muta-rotation
2.Inversion
3.Pyrolysis
4.None of these.
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Hyperglycemia refers to
1.High blood sugar level
2.Low blood sugar level
3.High concentration of salts in blood
4.Low concentration of salts in blood.
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In cellular respiration, there is a net gain of _________ per molecule of glucose
1.38 ATP molecules
2.50 ATP molecules
3.36 ATP molecules
4.10 ATP molecules.
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In myoglobin the number of polypeptide chains associated with one heme unit is
1.Three
2.One
3.Two
4.Four.
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In stomach the proteins are broken down into peptides by enzyme
1.Trypsin
2.Pepsin
3.Chymotrypsin
4.Amylase.
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Insulin is
1.a protein
2.a hormone
3.Both of the above
4.None of these.
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Insulin is secreted by
1.Pancres
2.Stomach
3.Thyroid
4.Adernal medula.
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Lactose on hydrolysis yields
1.Glucose
2.Fructose
3.Glucose and fructose
4.Glucose and galactose.
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Maltose on hydrolysis yields
1.Fructose
2.Glucose
3.Galactose
4.Glucose + Fructose.
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nvert sugar is
1.A variety of cane sugar
2.Optically inactive form of sugar
3.Mixture of glucose and fructose in equimolar proportion
4.Mixture of glucose and galactose.
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Peptids on hydrolysis give .
1.Ammonia
2.Amines
3.Amino acids
4.Hydroxy acids
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Photosynthesis involves
1.conversion of chemical energy into radiant energy
2.conversion of chemical energy into mechanical energy
3.conversion of solar energy into chemical energy
4.conversio of mechanical energy into chemical energy.
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Pyrimidine bases present in RNA are
1.Adenine and guanine
2.Thymine and uracil
3.Uracil and cytosine
4.Thymine and cytosine.
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Reference proteins are those obtained from
1.Milk
2.Soyabean
3.Meat
4.Egg
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Ribose and 2-deoxyribose are
1.Isomers
2.Diastereomers
3.Enantiomers
4.Aldopentoses.
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Ribose is an example of
1.Polysaccharide
2.Disaccharide
3.Hexose
4.Pentose.
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Sucrose on hydrolysis yields a mixture which is
1.Optically inactive
2.Dextro rotatory
3.Laevo rotatory
4.Racemic.
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The amino acids are the end products of the digestion of
1.Lipids
2.Fats
3.Proteins
4.Enzymes.
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The constituent units of sucrose are
1.lactose and glucose
2.glucose and fructose
3.galactose and glucose
4.glucose and maltose.
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The destruction of the biological nature and activity of proteins by heat or chemical gaent is called
1.dehydration
2.denaturation
3.denitrogenation
4.deammination.
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The disease phenyl ketone urea is caused by the deficiency of .
1.Acetophenone
2.Phenyl acetone
3.Triosinase
4.Phenylalanine hydroxylase
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The energy released during conversion of ATP to ADP is approximately
1.31 KJ/mole
2.3.0 KJ/mole
3.28 KJ/mole
4.2.8 KJ/mole
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The enzyme that converts starch into maltose is called
1.Zymase
2.Maltase
3.Invertase
4.Amylase.
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The first stage of oxidation of carbohydrates is known as
1.Glycolysis
2.Celluar respiration
3.Krebs cycle
4.Anabolism.
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The force of attraction between the neighbouring peptide chains is
1.van der Waals force
2.Covalent bond
3.Hydrogen bond
4.Peptide linkage.
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The letter D in D-glucose signifies
1.dextri ritatory
2.mode of synthesis
3.its configuration
4.its dsiamagnetic nature.
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The linkage that holds monosaccharide units together in a polysaccharide is called
1.Peptide linkage
2.Glycoside linkage
3.Hydroxide linkage
4.Nucleoside linkage.
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The linkage which holds various amino acid units in primary structure of proteins is
1.glycoside linkage
2.peptide linkage
3.ionic linkage
4.hydrogen bond.
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The main structural feature of proteins is
1.Peptide linkage
2.Glucoside linkage
3.Ether linkage
4.All the three.
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The non-proteinous substances which certain enzymes require for their activity are called
1.Catalysts
2.Inhibitors
3.Co-enzymes
4.Epimers.
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The number of polyeptide chains present in a molecule of haemoglobin is
1.8
2.6
3.4
4.12
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The proteins with a prosthetic group are known as
1.Complix proteins
2.Conjutated proteins
3.Secondary proteins
4.Essential proteins.
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The reagent which forms crystalline osazone derivative when reacted with glucose is
1.Fehling solution
2.Phenylhydrazine
3.Benedict solution
4.Hydroxylamine.
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The region of plants where photosynthesis occurs is called .
1.Mitochondria
2.Chloroplast
3.Cytoplasm
4.None of these
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Whcih of the following bases is a purine ?
1.Thymine
2.Uracil
3.Cytosine
4.Adenine.
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Whcih of the following bases is not present in DNA ?
1.Thymine
2.Uracil
3.Adenine
4.Guanine.
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Whcih of the following fatty acids is a saturated fatty acid ?
1.Oleic acid
2.Linoleic acid
3.Linolenic acid
4.Stearic acid.
Posted Date:-2021-09-27 13:00:18
Whcih of the following is protozoal disease ?
1.Mumps
2.Measles
3.Syphilis
4.Malaria.
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Whcih one of following vitamins checks night blindness ?
1.A
2.B
3.C
4.D
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When hemiacetal reacts with alcohol, the product is
1. Dihemiacetal
2.Alcohol
3.Peptide
4.Acetal.
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Which carbohydrate is an essential constituent of plant cells ?
1.Starch
2.Sucrose
3.Glucose
4.Cellulose.
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Which chemical substance act as emulsifiers in lipid metabolism ? .
1.Hydrochloric acid
2.Bile acids
3.Nucleosde
4.Fatty acids
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Which disaccharide is present in milk ?
1.Maltose
2.Galactose
3.Sucrose
4.Lactose.
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Which name is associated with the chemical substances produced in endocrine ductless glands ?
1.Vitamins
2.Antigens
3.Bile acids
4.Hormones.
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Which of following is an example of fibrous protein ?
1.Insulin
2.Haemoglobin
3.Fibroin
4.Glucogen.
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Which of the following can be used for detection of traces of iodine ?
1.Glucose in aqueous solution
2.Starch in aqueous solution
3.Cellulose in alcoholic solution
4.Cellulose in aqueous solution.
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Which of the following compounds can reduce Tollens reagent ?I. Sucrose ; II. ; Glucose ; III. Fructose ; IV. Maltose.
1.I, II, III and IV
2.II
3.II and III
4.II, III and IV.
Posted Date:-2021-09-27 13:00:18
Which of the following enzymes helps in digestion of proteins ?
1.Invertase
2.Trypsin
3.Triosinase
4.Urease.
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Which of the following is a non reducing sugar ?
1.Glyceraldehyde
2.Glucose
3.Fructose
4.Sucrose.
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Which of the following is a test for proteins ?
1.Molischs test
2.Beilstein test
3.Biuret test
4.Benedicts test.
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Which of the following is an example of aldopentose ?
1.Glyceraldeyhde
2.Ribose
3.Fructose
4.Erythrose.
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Which of the following is an example of globular protein ?
1.Myosin
2.Collagen
3.Keratin
4.Haemoglobin
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Which of the following is an example of zwitter ion ?
1.Aniline
2.Alanine hydrochloride
3.Glycine
4.All of the above.
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Which of the following is an example of zwitter ion ?
1.Alanine
2.Glycine hydrochloride
3.Both of the above
4.None of these.
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Which of the following is an ketohexose ?
1.Fructose
2.Maltose
3.Glucose
4.Ribose.
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Which of the following is most abundant in the living world ?
1.Starch
2.Proteins
3.Glucose
4.Cellulose.
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Which of the following is not a monosaccharide ?
1.Glucose
2.Fructose
3.Glyceraldehyde
4.Surcose.
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Which of the following is not a sugar ?
1.Sucrsoe
2.Glucose
3.Fructose
4.All are sugars.
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Which of the following is not proteinous ?
1.Wool
2.Hair
3.Nails
4.DNA.
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Which of the following is not sweet in taste ?
1.Lactose
2.Maltose
3.Galactose
4. Starch.
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Which of the following is the simple carbohnydrate ?
1.Glucose
2.Maltose
3.Sucrose
4.Glyceraldehyde.
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Which one of the following is synthesized in our body by sun rays?
1.Vitamin D
2.Vitamin B
3.Vitamin K
4.Vitamin A
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With which of the following disease is Vitamin K associated ?
1.Rickets.
2.Coagulating property of blood
3.Scurvy
4.Sore throat.
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