Biomolecules Quiz

Biomolecules

Quiz

 

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.

Indian Knowledge Systems: A Calendar for the year 2021 Past, Present & Future

 Made  By  NEHRU MUSEUM OF SCIENCE & TECHNOLOGY INDIAN INSTITUTE OF TECHNOLOGY KHARAGPUR. 

It is dedicated to Centre of Excellence for Indian Knowledge Systems (IKS)  Actually it is made with brief knowledge about The Seven Sages of India, Sanskrit, Arthashastra, Rasayana, Ayurveda, Jyotir tatha Mahajagatik Vidya, Prakriti Vidya, Prakriti Vidya, Nandan Tatya and Vaastu Vidya, Nyaya Shastra, Shilpa tatha Natya Shastra etc.

Biomolecules assertion-reasons type questions

 

Assertion-Reason Type Question from Biomolecules

(A) Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.

(B) Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion

(C)  Assertion is correct, but reason is wrong statement. 

(D)  Assertion is wrong, but reason is correct statement.

1. Assertion- sucrose is a non-reducing sugar.

        Reason-  it has glycosidic linkage

        Ans-b

     2. Assertion- Glucose and fructose can be distinguished by Tollen’s reagent.

        Reason- Glucose contains an aldehyde group while fructose contains a keto group.

        Ans-d

     3. Assertion- Carbohydrates were earlier called as hydrates of carbon.

        Reason – Carbohydrates can be hydrolysed.

       Ans- b (hydrates of carbon due to their general formula, C_x (H₂O)_y.

     4. Assertion- Starch is a non-sugar

        Reason- Starch is polysaccharides.

       Ans- b    (non-sugar means not sweet in taste)

    5. Assertion- Cellulose is a carbohydrate.

       Reason- Cellose has Molecular formula (C₆H₁₀O₅) _n

       Ans- a

    6. Assertion-all naturally occurring α- amino acids except glycine are optically active.

        Reason- Most naturally occurring amino acid acids have L- configuration.

        Ans- b

    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

      Ans-a

    8. Assertion – Valine is non-essential amino acid.

       Reason - The lack of essential amino acids in the diet causes kwashiorkor.

      Ans- d

            Hint-      Essential amino acid (cannot synthesized in body)  example-Valine, Leucine, Isoleucine, Phenylalanine, Arginine, Threonine, Tryptophan, Methionine, Lysine, Arginine, Histidine

    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

         Ans-a

          Hint- (the pH at which the lack of movement of ions during electrophoresis happens is known as isoelectronic point of amino acids i.e. no net charge

    10.  Assertion- α- amino acids exists as dipolar ions or Zwitter ions

           Reason- α- amino acids are the building blocks of protein.

          Ans- b

    11.  Assertion- Two strands are complementary to each other.

           Reason- The hydrogen bonds are formed between specific pairs of bases.

          Ans- a

    12.  Assertion- Two strands are complementary to each other.

          Reason- Disulphide bonds are formed between specific pairs of bases.

          Ans- c

    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.

         Ans-a

    14.  Assertion- proteins are made up α- amino acids.

            Reason- During denaturation, secondary and tertiary structure of proteins are destroyed

            Ans-b

    15.  Assertion- proteins are made up α- amino acids.

           Reason- During denaturation, secondary and tertiary structure of proteins are destroyed but primary remains intact

           Ans-b

   16.  Assertion – Denaturation of protein occurs in stomach.

           Reason – The enzymes pepsin, trypsin and chymotrypsin present in stomach hydrolyse proteins to α- amino acids.

         Ans- a

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Vaccination

 Vaccination

It is a common saying that prevention is better than cure.  To prevent certain diseases, you can follow an immunization programme through vaccines.  By vaccination, you can prevent diseases by enabling your body systems to fight against the disease-causing germs.  They may enter the body through different ways and sources.  As you already know, developing the fighting capability in a body is called immunization.  A new-born baby is inoculated with triple vaccine of diphtheria, tetanus and  pertussis or whooping cough (DPT).  Vaccines are given on a massive scale to restrict or prevent epidemics, such as cholera and typhoid. A vaccine stimulates your immune system to produce antibodies exactly like it would if you were exposed to the disease. After getting vaccinated, you develop immunity to that disease first. This is what makes vaccines such powerful medicine.

Oral Polio Vaccine (OPV)

You have heard of pulse polio immunization.  It constitutes the largest single day public health event, it was conducted for the first time in December, 1995, in an attempt to eradicate polio from our country.  Let us know something about the Oral Polio Vaccine (OPV).  A dose of 3 drops is given orally to the child as per the National Immunisation Schedule (NIS), which, is, one dose each at 1.5, 2.5 and 3.5 months age and a booster dose at the age of 1.5 years.  The vaccine consists of milder forms of polio viral particles. 

Q1. Find the odd one out:                                                                                    (1 mark)

a) BCG                   b) DPT                    c) OPV                   d) NIS

Ans-d

Q2. The diseases in   DPT are:                                                                               (1 mark)

a)    Diarrhoea, pneumonia, tetanus

b)    Diphtheria, pneumonia, TB

c)    Diphtheria, pertussis, tetanus

d)    Diarrhoea, pneumonia, tetanus

Ans- c

Q3. State True or False:                                                                                         (5 marks)

a)    A dose of 4 drops is given orally to the child as per the National immunization schedule.

b)    Small pox is the disease which has been totally eradicated from the world.

c)    Vaccine consists of dead or weakened form of microbes, its toxins or one of its surface.

d)    A booster dose of OPV is given at 2.5 years.

e)    All vaccines are 100% effective.

Q4. How vaccines protect individuals and community?                            (3 marks)

Q5 . In this pandemic era everybody wants to develop immunity and is waiting for covid19 vaccine. In this regard doctors are using a term frequently “herd immunity”. What is herd   immunity  ? Is it real? Does it work?                                              (5 marks)

Q6 . A child is invited to a chicken pox party. Would it be better for the child to get the chicken pox this way?                                                                      (5 marks)

 

Important name reaction -organic chemistry

 

Rajasthan Eligibility Examination For Teachers- 2021(Application form)

                         Rajasthan Eligibility Examination For Teachers- 2021

The Board of Secondary Education, Rajasthan (BSER) has started the online application window for recruitment to the various posts of Grade 3 teachers through Rajasthan Eligibility Examination For Teachers (REET 2021) for 32000 vacancies.

Here we are going to deliver all major information regarding REET 2020 Application Form

Notification	REET 2021 Notification Released @education.rajasthan.gov.in, Few Changes Made in Eligibility & Selection Process, Online Application Starts from 11 January
Notification Date	Jan 5, 2021
Starting Date of Submission	Jan11, 2021
Last Date of submission	Feb 8, 2021
State	Rajasthan
Last Fee payment date	Feb 4, 2021
Online direct application form Link Click here👉	BOARD OF SECONDARY EDUCATION, RAJASTHAN, AJMER