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i, 12., 13., , iM., 15., , 16., , 17., , CHEMISTRY-TEST, CLASS-12th, , Which of the following statements is incorrect ?, , (a) Maltose gives two molecules of glucose only,, (b) Cellulose and sucrose are polysaccharides., , {c) Polysaccharides are not sweet in taste, , (d) Polysaccharides are also known as non-sugars, , Which of the following statements is incorrect regarding, glucose’?, , (a) It isan aldohexose, , (b) It is also known as dextrose, , (ce) Hismonomer of cellulose, , (d) It is the least abundant organic compound on earth, , Glucose gives silver mirroe test with Tollen’s reagent. It, shows the presence of, , (a) acidic group {b) alcoholic group, , (c) ketonic group {d) aldehyde group, , The symbols D and L represent, , (a) the optical actavity of compounds., , (b) the relative configuration ofa particular stereoisomer, (ec) the dextrorotatory nature of molecule, , (d) the levorotatory nature of molecule, , When glucose reacts with bromine water, the main product, is, , (a) gluconic acid {b) glyceraldehyde, {c) saecharic acid {d) acetic acid, Glucose docs not react with, , (a) Bro (b) H,NOH, , (c) HI (d) NaHSO,, Which is the least stable form of glucose ?, , (a) c-D-Glucose (b) B-D-Gillucose, , (ce) Open chain structure (d) All are equally stable, Isomenzation of glucose produces, , (a) gulactose (b) fructose, , (c) mannose (d) allose, , The number of chiral carbon atoms present in cyclic, structure a-D +) glucose, , fa) 3 {b) 4 (ce) $ (a) 6, , ‘The a-D glucose und f-D glucose differ from each other, due to difference in carbon atom with respect to its, , (a) conformation {b) configuration, , fc) number of OH groups (d) size of hemiacetal ring, Which of the following ts the sweetest sugar?, , (a) Sucrose (b) Glucose — (c) Fructose (d) Maltose, Cellulose is a polymer of, , (a) Glucose (b) Fructose {(c) Ribose, Sucrose on hydrolysis gives, , (a) fructosetribose (bh) glucose + fructose, , (c) glucose+glucose (d) fructose + fructose, Carbohydrates are stored in the body as, , (a) sugars (b) starch (c) glucose (d) glycogen, Which of the following carbohydrate docs not correspond, tothe general formula C (H,O), ?, , (a) Glucose (b) 2-Deoxyribose, , (c) Fructose (d) Arabinose, , Lactose is made of, , (a) o-D-glucose only, , (b) a-D-glucose and §-D-glucose, , (c) a-D-galactose and f§-D-glucose, , {d) f-D-galactose and f-D-glucose, , (d) Sucrose, , Which of the following monosaccharides are present as, five membered cyclic structure (furanose structure)?, , (i) Ribose Gi) Glucose, (i) Fructose (vy) Galactose, (a) (i)and (ui) (b) (i)and (tii), , (c) (im)and (rv) (@) (nyand (in), , ts, , 20., , 21., , 22., , 26,, , Invert sugar is, , (a) chemically mactive form of sugar, , (b) equimolecular mixture of glucose and fructose, (c) mixture of glucose and sucrose, , (d) a variety of cane sugar, , Chemically amylose is a with 200-1000, a-D-(+}-glucose units held by glycosidic linkage, (a) long unbeanched chain, C1- C6, , (b) beanched chain, C1 -—C4,, , (c) long unbeanched chain, C1-C4., , (d) branched cham, C1 C6., , Match the columns, Column -1 Column - I, (Enzymes) (Reactions), (A) Invertase ({p) Decomposition of urea into, NH, and CO,, (RB) Maltase {q) Conversion of glucose into, ethyl alcohol, (©) Pepsin (cr) Hydrolysis of maltose into, glucose, (D) Urease (s) Hydrolysis of cance sugar, (EF) Zymase (1) Hydrolysis of proteins into, , peptides, A (8), B47), C0, D-(p), E-@), A-(9), B-(q), C—(s), D-(p), E-(), A (@).B (pC ().D (s),E (ty, A-(s), B—(p), C-(), D-(q), E-(1), , fa), (b), (ce), (d), , Assertion : Sucrose 1s called an invert sugar., , Reason : On hydrolysis, sucrose bring the change in the, sign of rotation from dextro (+) to laevol_), , (a) Assertion is correct, reason is correct, reason is a, correct explanation for assertion., , Assertion is correct, reason is correct, reason is not a, correct explanation for assertion, , Assertion 1s correct, reason 1s incorrect, , Assertion 1s incorrect, reason 1s correct., , ib), , «), (d), , One of essential ct-amino aeads ts, , fa) lysine (b) serine, , (c) glycine (d) proline, , Two functional groups that are present in all amino acids are, the, , fa) hydroxy, amine (b) hydroxy, amide, , {c) carboxyl, amino (d) carboxyl, amide, , Which of the following is not an optically active amino, acid?, , fa) Valine (b) Glycine, , {c) Leucine (d) Argmine, , Denaturation of proteins leads to loss of its biological, activity by, , fa) Formation of ammo acids, , (hb) Loss of primary structure, , (c) Loss of both primary and secondary structures, , {d) Loss of both secondary and tertiary structures, Amino acids generally exist in the form of Zwitter ions, This, means they contain, , {a) basic—NH, group and acidic —COOH group, , (bh) the basio— NH, group and acidic —COO™ group, {c) basic—NH, and acidic —H’* group, , (4) basic -COO™ group and acidic — NH group

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27., , 29., , 3., , 32., , 36., , 38., , 39., , 40., , 41,, , 42., , Simplest proteins has one peptide linkage. It is, , {a) tripeptide (b) dipeptide, , {c) tetrapeptide (d) oligopeptide, Proteins are polypeptides of, , fa) B-wminoacids (b) a-hydroxy acids, (c) D-c-umino acids (d) L-a-amineacids, Globular proteins are present in, , ta) blood (b) less, , {c) milk (d) all of these, , In fibrous proteins, polypeptide chains are held together by, (a) van der waals forees, , (b) clectrostatic forces of attraction, , (c) hydrogen bonds, , (d) covalent bonds, , Which of the following is not a fibrous protein?, , fa) Keratin (b) Myosin, , {c) Insulin (d) Both (a) and (b), , Proteins are condensation polymers of, (a) c-aminoacids (b) B-amino acids, , {c) a-hydroxy acids (d) B-hydroxy acids, , The helical structure of protein is stabilized by, {a) dipeptide bonds (b) hydrogen bonds, {c) ether bonds (d) peptide bonds, , Coagulation of protein is known as., , (a) dehydration (b) decay, , {c) deamination (d) denaturing, , Which of the following terms refers to the overall three, dimensional shape of a protein, , (a) Primary structure ({b) Secondary structure, , {c) Tertiary structure (4) Quaternary structure, , Which of the following protein destroys the antigen when, i enters in body cell?, (a) Antibodies, , {c) Chromoprotein, , (b) Insulin, (@) Phosphoprotein, , Which of the following molecules is capable of forming, Zvatter ton?, , (a) NH,CH,COOH, (ce) CH,CH,COOH, , The presence of absence of hydroxy! group on which carbon, ittom of sugar differentiates RNA and DNA?, , fa) (by) 2, , © * (@) 4®, , (by CH;CH,NH,, , In DNA the linkages between different nitrogenous hases, , are:, , {a) peptide linkage (b) phosphate linkage, , {c) Le-bonding (d) glycosidic linkage, DNA multiplication is called as, , (a) translation (b) transduction, , {c) transcription (d) replication, Chromosomes are made from, , {a} proteins, , {b) nucleic acids, , {c) proteins and nucleic acids, , {d) carbohydrates and nucleic acids, , 43. The double helical structure of DNA was proposed by, , (a) Watson and Crick (b) Meichers, , (c) Emil Fischer (d) Khorana, 44, a - Helix is found in, , (a) DNA (b) RNA, , (c) liped (d) carbohydrates, , 58. Which of the following compounds is responsible for the, , 46,, , 47,, , 49,, , 3., , w, S, , transmission of heredity characters?, , (a) RNA {b) DNA, , (c) Glucose ({d) Haemoglobin, Energy ts stored in our body in the form of, , (a) ATP (b) ADP, , {c) fats (qd) carbohydrates, , The chemical change in DNA molecule that could lead to, synthesis of protein with an altered amino acid sequence is, called, (a) replication, (c) cellular membrane, , (b) lipid formation, (4) mutation, , DNA hes deoxyribose, a base and the third component which is, {a} phosphoric acid (b) ribose, (c) adenine (4d) thymine, , The process by which synthesis of protem takes place based, on the genetic information present in m-RNA is called, , (a) Translation (>) Transcription, , (c) Replication (d) Messenger hypothesis, Which of the following is not present in a nucleotide?, (a) Guanine (b) Cytosine, , (c) Adenine (d) Tyrosine, , The function of DNA in an organism is, (a) toasstst in the synthesis of RNA molecule, (b) tostore information of heredity characteristics, (c) to assist in the synthesis of proteins and polypeptides, (d) All of these, , In both DNA and RNA, heterocyclic base and phosphate, ester linkages are at—, , (a) Cand C, respectively of the sugar molecule, (b) C} and C5 respectively of the sugar molecule, (©) C) and Cy respectively of the sugar molecule, (d) Cs and C} respectively of the sugar molecule, , Which of the following polymer is strored in the liver of, animals?, , (a) Amylose (b) Cellulose, , {c) Amylopectin (d) Glycogen, , Sucrose (Cane sugar) ts a disaccharide. One molecule of, sucrose on hydrolysis gives .......... ., , {a) 2 molecules of glucose, , {b) 2 molecules of glucose + ! molecule of fructose, , {c) 1 molecule of glucose + | molecule of fructose, , {d) 2 molecules of fructose, , Structure of disaccharide formed by glucose and fructose is, given below. Identify anomeric carbon atoms in, monosaccharide units., , , , (a) ‘a’ carbon of glucose and ‘a’ carbon of fructose, (b) ‘a’ carbon of glucose and 'e’ carbon of fructose, {c) ‘a’ carbon of glucose and 'b’ carbon of fructose, (d) 'f' carbon of glucose and ‘f' carbon of fructase