BIOMOLECULESMultiple Choice Questions1) Which one is not fibrous protein?a) Globulinb) Clloagenc) keratind) actin 2)Casein contained contained in milk is a/ana) Carbohydratesb) Lipidc) Proteind) Important molecules3) Which of the following has an imino(>NH)group instead of amino group(NH2)?a) Prolineb) Isoleucinec) Tyrosined) Serine4) RNA containsa) Ribose sugar and thymine thymineb) Ribose sugar and Uracilc) Deoxyribose sugar and Uracild) Deoxyribose sugar and thymine5) A compound give negative test with ninhydrin and positive test with benedictssolution. The compound isa) A proteinb) An amino acidc) A lipidd) A monosaccharide6) Raffinose isa) Di h id Disaccharideb) Monosaccharidec) Trisaccharided) None of these7) Insulin isa) protienb) An amino acidc) A carbohydrated) A lipid8) Complete Complete hydrolysis hydrolysis of cellulose cellulose givesa) Dfructoseb) Dribosec) Dglucosed) Lglucose9) The change in optical rotation of freshly prepared solution of glucose is known asa) Tautomerismb) Racemizationc) Specific rotationd) Mutarotation10) Which of the following compounds, when heated at 483k turns to caramel?a) Glucoseb) Sucrosec) Fructosed) Lactose11) There are 20 naturally naturally occurring occurring aminoacids. The maximum number of tripeptides that can be obtained obtained area) 8000b) 6470c) 7465d) 536012) Which amino acid has imidazole imidazolering?a) Alanineb) Leucinec) Trysoined) Histidine13) Iscoeletric point isa) Specific temperatureb) Suitable concentration of amino acidc) Hydrogen ion concentration that does notallow migration of amino acid under electricfieldd) Melting point of amino acid under theinfluence of electric field14) Proteins Proteins when heated with conc.Nitric acid give a yellow color. This isa) Hoppes testb) Acid base testc) Biurets testd) Xhi antoprotic test 15) The change in optical rotation with time of freshly prepared solution of sugar(with enzymes) is known asa) Specific rotationb) Inversionc) Rotator motiond) Mutarotation16) A nucleotide consists ofa) Base and sugarb) Sugar and phosphatec) Base, Sugar and phosphated) Base and phosphate17) Gene is a segment segment ofa) DNAb) Proteinc) mRNAd) rRNA18) insulin production of its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories?a) A coenzymeb) A hormonec) An enzymed) An antibiotic19) When glucose reacts with brominene water,the main product isa) Acetic acidb) Saccharic acidc) Glyceraldehydesd) Gluconic acid20) Nucleic Nucleic acids are polymers polymers ofa) Nucleosidesb) Globulinsc) Nucleonsd) Nucleotides21) Night blindness may be caused by the deficiency of vitamina) Ab) Bc) Cd) D22) The number of amino acids in insulin isa) 21b) 574c) 51d) 573323) Which of the following contains cobalt?a) VitaminAb) VitaminCc) VitaminB12d) VitaminK24) A l my o pectin is a polymer ofa) Dglucoseb) Dfructosec) lactosed) amylase25) The term anomers of glucose refers toa) isomers of glucose that differ in differ in configuration configuration at carbons carbons one andfour(C1 and C4)b) a mixture mixture of(D) glucose glucose and (L) glucose glucosec) enantiomers of glucosed) isomers of glucose that differ inconfiguration at carbons one(C1)26) The reason for double helical helical structure structure of DNA is operation ofa) Vander waals forcesb) Dipoledipole interactionc) Hydrogen bondingd) Electro static attraction27) The pyrimidine bases present in DNA area) Cytosine and adenineb) Cytosine and guaninec) Cytosine and thymine thymined) Cytosine and Uracil28) Which of the following is example of ketohexose?a) Mannoseb) Galactosec) Maltosed) Fructose29) RNA and DNA are chiral molecules this chirality is due toa) Lsugar componentsb) Chiral basesc) Dsugar componentd) Chiral phosphate phosphate ester units30) Whi hc one of the following is a peptidehormone?a) Glucagonb) Testosteronec) Thyroxind) Ad li rena ne31) M th l e y D gl id ucos e and meth l y Dglucoside area) Epimersb) Anomersc) Enantiomersd) Conformational diastereomers32) Which functional group participates indisulphide bond formation in proteins?a. Thiolactoneb. Thiolc. Thioetherd. Thioester33) Which one of the following following bio molecules molecules isinsoluble in water?a) keratinb) hemoglobinc) Ribonucleased) Adenine34) N b um er of chi l ra carbon atoms in D(+)glucose isa) Fiveb) Sixc) Threed) Four35) Which of the following set consists of onlyessential amino acid?a) Alanine, tyrosine, cysteineb) Leucine, phenyl alanine alanine, tryptophan tryptophanc) Alanine, glutamine, lysined) Leucine, proline proline, glycine glycine36) which of the following is conjugatedprotein?a. Phospho proteinb. Glycoproteinc. Chromoproteind. All of these37) Which one of the following sets ofmonosaccharide's forms sucrose?a) Dgalactopyranose andDglucopyranoseb) D glucopyranose D fructofuranosec) D giucopyranose giucopyranose and D fructofuranose fructofuranosed) D galactopyranose D fructofuranose38) Glucose mol l ecu e reacts with X number ofmolecules of phenyl hydrazine to yield osazone.The value of X isa) Fourb) Onec) Twod) Three39) Which base is present present in RNA but not inDNA?a) Uracilb) Cytosinec) Guanined) Thymine40) Which one of the following statementis not true regarding regarding (+) lactose? lactose?a) (+) lactose is aglycoside formed by the union ofmol l ecu e of D( ) + glucose and a mol l ecu e of D( ) +galactoseb) (+) lactose lactose is a reducing reducing sugar and does not exhibit exhibitmutarotationc) (+) lactose lactose, contains contains 8OH groupsd) On hydrolysis,(+) lactose gives equal amount of D(+)glucose (+)glucose and D(+)galactose galactose41) Glycogen is a branched chain polymer ofDglucose units in which chain is formed by C1C4glycosidic linkage whereas branching occurs by theformation of C1C6 glycosidic linkage. Structure ofglycogen is similar to __________. (i) Amylose (ii) Amylopectin (iii) Cellulose (iv) Glucose42) Which of the following polymer isstored in the liver of animals? animals?a) Amyloseb) Cellulosec) Amylopectind) Glycogen43) Sucrose (cane sugar) is a disaccharide. Onemolecule of sucrose on hydrolysisgives _________.a) 2 molecules molecules of glucose glucoseb) 2 molecules of glucose + 1 molecule offructosec) 1 molecule of glucose + 1 molecule offructosed) 2 molecles of fructose44) Which of the following acids is aa) A tisapric acidb) Ascorbic acidc) Adipic acidd) Saccharicd acid45) Which of the following statementsis not true ab t ou gl ? ucosea) It is an aldohexose.b)On heating heating with HI it forms nhexane. hexane.c)It is present in furanose form.d) It does not give 2 4, DNP t t es .46) Each polypeptide in a protein has amino acidslinked with each other in a specific specific sequence sequence. Thissequence of amino acids is said to be ____________.a) primary structure of proteins.b) secondary structure of proteins.c) tertiary tertiary structure structure of proteins proteins.d) quaternary structure of proteins.47) Which of the following B groupvitamins vitamins can be stored in our body?a) Vitamin B1b) Vitamin B2c) Vitamin B6d) Vitamin B1248) Which of the following bases is notpresent in DNA?a) Adenineb) Thyminec) Cytosined) Uracil49) Which of the following reactions of glucosecan be explained explained only by its cyclic structure? structure?a)Glucose forms pentaacetate.b)Glucose reacts with hydroxylamine to form anoxime.c)Pentaacetate of glucose does not react withhydroxylamine.d)Glucose is oxidised by nitric acid to gluconicacid.50) Based on reducing or nonreducing p p y, ro erty,Sucrose is a __________.a) monosaccharideb) disaccharidec) nonreducing sugard) reducing sugar51) Which of the following carbohydratesare branched polymer of glucose?a) Amyloseb) A l ti my opectinc) Glycogend)Cellulose52) Which of the following monosaccharides arepresent present as five membered membered cyclic structure structure(furanose structure)?a) Glucoseb) Ribosec) Manosed) Galactose53) In fibrous fibrous proteins, proteins, polypeptide polypeptide chainsare held together by .a) Van der Waals forcesb) Hydrogen bondsc) Disulphide linkaged) Both (b) and (c)54) Which of the following are purinebases?a) Guanineb) Adeninec) Thymined) Both (b) and (a)55) Which of the following terms arecorrect about enzyme?a)Dinucleotidesb)Nucleic acidsc) Amino acid.d) Biocatalysts56) Proteins are found to have two differenttypes of secondary secondary structures structures viz. helix and pleated sheet structure.helix structure ofprotein is stabilised stabilised by :a) Peptide bondsb) van der Waals forcesc) Hydrogen bondsd) Dipoledipole interactions57) DNA and RNA contain four bases each.Which of the following following bases is notpresent in RNA?a) Adenineb) Uracilc) Thymined) Cytosine58) Dinucleotide Dinucleotide is obtained obtained by joining joining twonucleotides together by phosphodiester linkage. Between Between which carbon atoms of pentose pentose sugars of nucleotides are these linkages present?a) 5 and 3b) 1 and 5c) 5 and 5d) 3 and 359) Lysine, is _____.a)Amino acidb) Basic amino acidc) Amino acid synthesised synthesised in bodyd)Amino acid60) Proteins can be classified into two types on the basis of their molecular shape i.e., fibrous proteins and globular proteins.Example of globular proteins is :a)Collagenb)Albuminc)Keratind)Myosin

BIOTECH QUESTION BANK ON BIOMOLECULES GROUP NO.:GROUP MEMBERS:SACHIN JAINARK DUTTAAAYUSHHIMANSHU