Biomolecules Quiz

Biomolecules

Quiz

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1. Assertion- sucrose is a non-reducing sugar.
   Reason- it has glycosidic linkage
   
   1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
   2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
   3.   Assertion is correct statement and assertion is incorrect statement.
   4.   Assertion is incorrect statement and reason is correct statement
2. Assertion- Glucose and fructose can be distinguished by Tollen’s reagent.
   Reason- Glucose contains an aldehyde group while fructose contains a keto group.
   1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
   2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
   3.   Assertion is correct statement and assertion is incorrect statement.
   4.   Assertion is incorrect statement and reason is correct statement
3. Assertion- Carbohydrates were earlier called as hydrates of carbon.
   Reason – Carbohydrates can be hydrolysed.
   1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
   2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
   3.   Assertion is correct statement and assertion is incorrect statement.
   4.   Assertion is incorrect statement and reason is correct statement
4. Assertion- Starch is a non-sugar
   Reason- Starch is polysaccharides.
   1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
   2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
   3.   Assertion is correct statement and assertion is incorrect statement.
   4.   Assertion is incorrect statement and reason is correct statement
5. Assertion- Cellulose is a carbohydrate.
   Reason- Cellose has Molecular formula (C6H10O5) n
   1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
   2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
   3.   Assertion is correct statement and assertion is incorrect statement.
   4.   Assertion is incorrect statement and reason is correct statement
6. Assertion-all naturally occurring α- amino acids except glycine are optically active.
   Reason- Most naturally occurring amino acid acids have L- configuration.
   1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
   2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
   3.   Assertion is correct statement and assertion is incorrect statement.
   4.   Assertion is incorrect statement and reason is correct statement
7. Assertion- α- amino acids exist as internal salt in solution as these have amino and carboxylic group in vicinity.
   Reason- H+ ions given by carboxylic group (-COOH) is captured by amino group(-NH2) having lone pair of electrons
   1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
   2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
   3.   Assertion is correct statement and assertion is incorrect statement.
   4.   Assertion is incorrect statement and reason is correct statement
8. Assertion – Valine is non-essential amino acid.
   Reason - The lack of essential amino acids in the diet causes kwashiorkor.
   1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
   2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
   3.   Assertion is correct statement and assertion is incorrect statement.
   4.   Assertion is incorrect statement and reason is correct statement
9. Assertion – solubilities of protein (which are made of α- amino acids) is minimum at the isoelectric point.
   Reason-At isoelectric point protein molecules stop behaving as Zwitter ions.
   1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
   2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
   3.   Assertion is correct statement and assertion is incorrect statement.
   4.   Assertion is incorrect statement and reason is correct statement
10. Assertion- α- amino acids exists as dipolar ions or Zwitter ions
    Reason- α- amino acids are the building blocks of protein.
    1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
    2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
    3.   Assertion is correct statement and assertion is incorrect statement.
    4.   Assertion is incorrect statement and reason is correct statement
11. Assertion- Two strands are complementary to each other.
    Reason- The hydrogen bonds are formed between specific pairs of bases.
    1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
    2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
    3.   Assertion is correct statement and assertion is incorrect statement.
    4.   Assertion is incorrect statement and reason is correct statement
12. 12.Assertion- Two strands are complementary to each other.
    Reason- Disulphide bonds are formed between specific pairs of bases.
    1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
    2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
    3.   Assertion is correct statement and assertion is incorrect statement.
    4.   Assertion is incorrect statement and reason is correct statement
13. Assertion- Glucose reacts with hydroxylamine to form an oxime and also adds a molecule of hydrogen cyanide to give cyanohydrin.
    Reason The carbonyl group is present in the open chain structure of glucose.
    1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
    2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
    3.   Assertion is correct statement and assertion is incorrect statement.
    4.   Assertion is incorrect statement and reason is correct statement
14. Assertion- proteins are made up α- amino acids.
    Reason- During denaturation, secondary and tertiary structure of proteins are destroyed
    1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
    2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
    3.   Assertion is correct statement and assertion is incorrect statement.
    4.   Assertion is incorrect statement and reason is correct statement
15. Assertion- proteins are made up α- amino acids.
    Reason- During denaturation, secondary and tertiary structure of proteins are destroyed but primary remains intact
    1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
    2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
    3.   Assertion is correct statement and assertion is incorrect statement.
    4.   Assertion is incorrect statement and reason is correct statement
16. Assertion – Denaturation of protein occurs in stomach.
    Reason – The enzymes pepsin, trypsin and chymotrypsin present in stomach hydrolyse proteins to α- amino acids
    1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
    2.   Assertion & reason both are the correct statements but reason is not the correct explanation of the assertion.
    3.   Assertion is correct statement and assertion is incorrect statement.
    4.   Assertion is incorrect statement and reason is correct statement
17. Curdling of milk is an example of:
    1.   breaking of peptide linkage
    2.   hydrolysis of lactose
    3.   breaking of protein into amino acids
    4.   denaturation of protein
18. Disaccharides that are reducing in nature are:
    1.   sucrose and lactose
    2.   sucrose and maltose
    3.   lactose and maltose
    4.   sucrose, lactose and maltose
19. Which of the following is an example of denaturation of protein?
    1.   Boiling egg
    2.   Curding milk
    3.   Both of these
    4.   None of these
20. The bond between two units of monosaccharide through O atom is called
    1.   Peptide linkage
    2.   Pyranose ring
    3.   Glycosidic linkage
    4.   Furanose ring
21. RNA and DNA are chiral molecules, their chirality is due to
    1.   chiral bases
    2.   chiral phosphate units
    3.   D-sugar component
    4.   L-sugar component
22. Glucose does not react with
    1.   NH2OH
    2.   Cone. HNO3
    3.   (CH3CO)2O
    4.   NaHSO3
23. The glycosidic linkage involved in linking the glucose units in amylose part of starch is
    1.   C1 -C4 β-linkage
    2.   C1 -C6 α-linkage
    3.   C1 -C4 α-linkage
    4.   C1 -C6 β-linkage
24. A basic amino acid among the following is
    1.   glycine
    2.   valine
    3.   histidine
    4.   leucine
25. Glucose on oxidation with Br2(aq) gives
    1.   Gluconic acid
    2.   Tartaric acid
    3.   Sachharic acid
    4.   Meso-oxalic acid
26. Which of the following is non-reducing sugar?
    1.   Glucose
    2.   Sucrose
    3.   Maltose
    4.   Lactose
27. Which of the following statements is not correct?
    1.   Ovalbumin is a simple food reserve in egg white.
    2.   Blood proteins thrombin and fibrinogen are involved in blood clotting.
    3.   Denaturation makes the proteins more active.
    4.   Insulin maintains sugar level in the blood of a human body.
28. In aqueous solution, an amino acid exist as
    1.   cation
    2.   anion
    3.   zwitter ion
    4.   neutral molecule
29. Glycogen is a branched chain polymer of α-D-glucose units in which chain is formed by C1—C4 glycosidic linkage whereas branching occurs by the formation of C1– C6 glycosidic linkage. Structure of glycogen is similar to __________ .
    1.   Amylose
    2.   Amylopectin
    3.   Cellulose
    4.   Glucose
30. Which of the following polymer is stored in the liver of animals?
    1.   Amylose
    2.   Cellulose
    3.   Amylopectin
    4.   Glycogen
31. Proteins are found to have two different types of secondary structures viz. α-helix and β-pIeated sheet structure, α-helix structure of protein is stabilised by : [
    1.   Peptide bonds
    2.   van der Waals forces
    3.   Hydrogen bonds
    4.   Dipole-dipole interactions
32. Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present?
    1.   5’and 3′
    2.   1’and 5′
    3.   5′ and 5′
    4.   3′ and 3′
33. Nucleic acids are the polymers of __________ .
    1.   Nucleosides
    2.   Nucleotides
    3.   Bases
    4.   Sugars
34. Each polypeptide in a protein has aminoacids linked with each other in a specific sequence. This sequence of amino acids is said to be __________
    1.   primary structure of proteins.
    2.   secondary structure of proteins
    3.   tertiary structure of proteins.
    4.   quaternary structure of proteins.
35. Which of the following reactions of glucose can be explained only by its cyclic structure?
    1.   Glucose forms pentaacetate.
    2.   Glucose reacts with hydroxylamine to form an oxime.
    3.   Pentaacetate of glucose does not react with hydroxylamine.
    4.   Glucose is oxidised by nitric acid to gluconic acid.
36. The sugar present in milk is
    1.   Sucrose
    2.   Maltose
    3.   Glucose
    4.   lactose
37. α-D (+) glucose and β-D (+) – glucose are
    1.   Enantiomers
    2.   Geometrical isomers
    3.   Anomers
    4.   Epimers
38. Kerating present in hair is an example of
    1.   Fibrous protein
    2.   Globular protein
    3.   Conjugated protein
    4.   Derived protein
39. DNA and RNA differ in
    1.   Sugar
    2.   Purines
    3.   Pyrimidines
    4.   Both (a) and (c)
40. Carbohydrates are classified on the basis of their behaviour on hydrolysis and also as reducing or non-reducing sugar. Sucrose is a __________ .
    1.   both (B) and (D)
    2.   disaccharide
    3.   reducing sugar
    4.   non-reducing sugar
41. Name the simplest amino acid
    1.   Lycine
    2.   Glycine
    3.   Histidine
    4.   Proline
42. Assertion: D (+) – Glucose is dextrorotatory in nature.
    Reason: ‘D’ represents its dextrorotatory nature.
    1.   Assertion & reason both statements are correct and reason is the correct explanation of assertion.
    2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
    3.   Assertion is correct, but reason is wrong statement.
    4.   Assertion is wrong, but reason is correct statement.