IIT JEE/IIT JEE CHEMISTRY Biomolecules And Biological Processes Sample Test,Sample questions

Question:
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.


Question:
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.


Question:
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.


Question:
A sucrose molecule on hydrolysis yields




1.Gloucose

2.Fructose

3.Glucose and fructose

4.Glucose and galactose.


Question:
Adenosine monophosphate (AMP) is a/an

1.nucleotide

2.nucleoside

3.enzyme

4.nucleic acid.


Question:
Amino acids are formed on hydrolysis of

1.Fats

2.Proteins

3.Nucleic acids

4.Carbohydrates.


Question:
An example of zwitter ion is




1.Glucine hydrochloride

2.Ammonium acetate

3.Aniline

4.Alanine.


Question:
At isoelectric point, the amino acid has




1.Least viscosity

2.Maximum surface tension

3.Maximum solubility

4.All of the above.


Question:
ATP represents



1.abnormal temperature ande pressure

2.atmospheric temperature

3.adenosine triphosphate

4.None of these.


Question:
Biochemical reactions which require oxygen are called



1.Metabolic

2.both synthesis as well as

3.Anaerobic

4. No specific name.


Question:
Biuret test is used for the detection of




1.Sugars Proteins

2.Proteins

3.Fats

4.Starch.


Question:
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.


Question:
Chhse is an example of




1.Denaturede protein

2.Derived protein

3.Conjugated protein

4.Globular protein.


Question:
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.


Question:
Denaturation of protein does not have any effect on its




1.Secondary structure

2.Tertiary structure

3.Quaternary structure

4.Primary structure.


Question:
Digestion of carbohydrates mainly takes place in




1.Stomach

2.Small intestine

3.Large intestine

4.Mouth.


Question:
Digestion of lipids occurs primarily in



1.Stomach

2.Small intestine

3.Mouth

4.Large intestine.


Question:
During digestion which enzyme converts peptides into amino acids



1.Peptidase

2.Invertase

3.Lipase

4.Maltsae


Question:
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.


Question:
Enzymes are





1.Steroids

2.Proteins

3.Fatty acids

4.Nucleic acids.


Question:
Fructose has





1.Bitter taste

2.Sweet taste

3.Tasteless

4.Salty taste.


Question:
Glucose and fructose are




1.Isomers of each other

2.Homologues of each other

3.Anomers of each other

4.Enantiomers of each other.


Question:
Glucose cannot be classified as




1.Hexose

2.Carbohydrate

3.Aldose

4.Oligosaccharide.


Question:
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.


Question:
Glucose on oxidation with bromine water gives

1.Glyceric acid

2.Gluconic acid

3.Saccharic acid

4.Pyruvic acid.


Question:
Glucose on oxidation with nitric acid yields




1.Giucaric acid

2.Gluconic acid

3.Oxalic acid

4.Sorbitol.


Question:
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.


Question:
Glycoside linkage is an




1.amide linkage

2.ether linkage

3.ester linkage

4.None of these.


Question:
Glycylalanine and alanylglycine are

1.Stereosisomers

2.Structural isomers

3.Diastereomers

4.Identical.


Question:
Gums and pectins are examples of

.

1.Protiens

2.Lipids

3.Enzymes

4.Polysaccharides


Question:
he sweetest carbohydrate is



.

1.Sucrose.

2.Glucose

3.Fructose

4.Saccharine


Question:
Hydrolysis of sucrose into (+) glucose and (-) fructose is known as




1.Muta-rotation

2.Inversion

3.Pyrolysis

4.None of these.


Question:
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.


Question:
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.


Question:
In myoglobin the number of polypeptide chains associated with one heme unit is




1.Three

2.One

3.Two

4.Four.


Question:
In stomach the proteins are broken down into peptides by enzyme




1.Trypsin

2.Pepsin

3.Chymotrypsin

4.Amylase.


Question:
Insulin is


1.a protein

2.a hormone

3.Both of the above

4.None of these.


Question:
Insulin is secreted by


1.Pancres

2.Stomach

3.Thyroid

4.Adernal medula.


Question:
Lactose on hydrolysis yields




1.Glucose

2.Fructose

3.Glucose and fructose

4.Glucose and galactose.


Question:
Maltose on hydrolysis yields

1.Fructose

2.Glucose

3.Galactose

4.Glucose + Fructose.


Question:
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.


Question:
Peptids on hydrolysis give




.

1.Ammonia

2.Amines

3.Amino acids

4.Hydroxy acids


Question:
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.


Question:
Pyrimidine bases present in RNA are



1.Adenine and guanine

2.Thymine and uracil

3.Uracil and cytosine

4.Thymine and cytosine.


Question:
Reference proteins are those obtained from


1.Milk

2.Soyabean

3.Meat

4.Egg


Question:
Ribose and 2-deoxyribose are




1.Isomers

2.Diastereomers

3.Enantiomers

4.Aldopentoses.


Question:
Ribose is an example of

1.Polysaccharide

2.Disaccharide

3.Hexose

4.Pentose.


Question:
Sucrose on hydrolysis yields a mixture which is




1.Optically inactive

2.Dextro rotatory

3.Laevo rotatory

4.Racemic.


Question:
The amino acids are the end products of the digestion of




1.Lipids

2.Fats

3.Proteins

4.Enzymes.


Question:
The constituent units of sucrose are




1.lactose and glucose

2.glucose and fructose

3.galactose and glucose

4.glucose and maltose.


Question:
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.


Question:
The disease phenyl ketone urea is caused by the deficiency of




.

1.Acetophenone

2.Phenyl acetone

3.Triosinase

4.Phenylalanine hydroxylase


Question:
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


Question:
The enzyme that converts starch into maltose is called




1.Zymase

2.Maltase

3.Invertase

4.Amylase.


Question:
The first stage of oxidation of carbohydrates is known as




1.Glycolysis

2.Celluar respiration

3.Krebs cycle

4.Anabolism.


Question:
The force of attraction between the neighbouring peptide chains is




1.van der Waals force

2.Covalent bond

3.Hydrogen bond

4.Peptide linkage.


Question:
The letter D in D-glucose signifies



1.dextri ritatory

2.mode of synthesis

3.its configuration

4.its dsiamagnetic nature.


Question:
The linkage that holds monosaccharide units together in a polysaccharide is called



1.Peptide linkage

2.Glycoside linkage

3.Hydroxide linkage

4.Nucleoside linkage.


Question:
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.


Question:
The main structural feature of proteins is



1.Peptide linkage

2.Glucoside linkage

3.Ether linkage

4.All the three.


Question:
The non-proteinous substances which certain enzymes require for their activity are called




1.Catalysts

2.Inhibitors

3.Co-enzymes

4.Epimers.


Question:
The number of polyeptide chains present in a molecule of haemoglobin is

1.8

2.6

3.4

4.12


Question:
The proteins with a prosthetic group are known as




1.Complix proteins

2.Conjutated proteins

3.Secondary proteins

4.Essential proteins.


Question:
The reagent which forms crystalline osazone derivative when reacted with glucose is

1.Fehling solution

2.Phenylhydrazine

3.Benedict solution

4.Hydroxylamine.


Question:
The region of plants where photosynthesis occurs is called




.

1.Mitochondria

2.Chloroplast

3.Cytoplasm

4.None of these


Question:
Whcih of the following bases is a purine ?


1.Thymine

2.Uracil

3.Cytosine

4.Adenine.


Question:
Whcih of the following bases is not present in DNA ?


1.Thymine

2.Uracil

3.Adenine

4.Guanine.


Question:
Whcih of the following fatty acids is a saturated fatty acid ?

1.Oleic acid

2.Linoleic acid

3.Linolenic acid

4.Stearic acid.


Question:
Whcih of the following is protozoal disease ?

1.Mumps

2.Measles

3.Syphilis

4.Malaria.


Question:
Whcih one of following vitamins checks night blindness ?

1.A

2.B

3.C

4.D


Question:
When hemiacetal reacts with alcohol, the product is

1. Dihemiacetal

2.Alcohol

3.Peptide

4.Acetal.


Question:
Which carbohydrate is an essential constituent of plant cells ?




1.Starch

2.Sucrose

3.Glucose

4.Cellulose.


Question:
Which chemical substance act as emulsifiers in lipid metabolism ?


.

1.Hydrochloric acid

2.Bile acids

3.Nucleosde

4.Fatty acids


Question:
Which disaccharide is present in milk ?




1.Maltose

2.Galactose

3.Sucrose

4.Lactose.


Question:
Which name is associated with the chemical substances produced in endocrine ductless glands ?




1.Vitamins

2.Antigens

3.Bile acids

4.Hormones.


Question:
Which of following is an example of fibrous protein ?




1.Insulin

2.Haemoglobin

3.Fibroin

4.Glucogen.


Question:
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.


Question:
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.


Question:
Which of the following enzymes helps in digestion of proteins ?




1.Invertase

2.Trypsin

3.Triosinase

4.Urease.


Question:
Which of the following is a non reducing sugar ?




1.Glyceraldehyde

2.Glucose

3.Fructose

4.Sucrose.


Question:
Which of the following is a test for proteins ?



1.Molischs test

2.Beilstein test

3.Biuret test

4.Benedicts test.


Question:
Which of the following is an example of aldopentose ?




1.Glyceraldeyhde

2.Ribose

3.Fructose

4.Erythrose.


Question:
Which of the following is an example of globular protein ?




1.Myosin

2.Collagen

3.Keratin

4.Haemoglobin


Question:
Which of the following is an example of zwitter ion ?





1.Aniline

2.Alanine hydrochloride

3.Glycine

4.All of the above.


Question:
Which of the following is an example of zwitter ion ?




1.Alanine

2.Glycine hydrochloride

3.Both of the above

4.None of these.


Question:
Which of the following is an ketohexose ?




1.Fructose

2.Maltose

3.Glucose

4.Ribose.


Question:
Which of the following is most abundant in the living world ?

1.Starch

2.Proteins

3.Glucose

4.Cellulose.


Question:
Which of the following is not a monosaccharide ?




1.Glucose

2.Fructose

3.Glyceraldehyde

4.Surcose.


Question:
Which of the following is not a sugar ?




1.Sucrsoe

2.Glucose

3.Fructose

4.All are sugars.


Question:
Which of the following is not proteinous ?

1.Wool

2.Hair

3.Nails

4.DNA.


Question:
Which of the following is not sweet in taste ?


1.Lactose

2.Maltose

3.Galactose

4. Starch.


Question:
Which of the following is the simple carbohnydrate ?

1.Glucose

2.Maltose

3.Sucrose

4.Glyceraldehyde.


Question:
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


Question:
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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