Quiz - biology - Bimolecules-A & R questions

Q1. Assertion (A): We do not at the moment, understand the role or functions of all the secondary metabolite in host organisms.
Reason (R): Secondary metabolites arise from interaction of products of metabolic reactions.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q2. Assertion (A): Biomolecules which are found in the acid insoluble fraction are consider as macromolecules.
Reason (R): Biomolecules found in acid insoluble fraction have molecular weight more than 1000 Dalton.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q3. Assertion (A): Lipids whose molecular weight does not exceed 800 Dalton come under acid insoluble fraction.
Reason (R): Lipids are present not only as such but also arranged in structures like membranes during grinding these lipid form vesicle.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q4. Assertion (A): GLUT-4 is one of the essential protein for bioenergetics of the cell.
Reason (R): GLUT-4 enables glucose transport into cell.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q5. Assertion (A): Starch can be stained with iodine but cellulose can not be stained by iodine although both are homopolymer of glucose monomers.
Reason (R): Cellulose does not contain complex helices so can not hold iodine molecules.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q6. Assertion (A): Cellulose is a homopolymer, while chitin is a heteropolymer.
Reason (R): Cellulose is made up of identical monomers while chitin is made up of variable monomer units.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q7. Assertion (A): A nucleotide is an assemblage of three distinct components.
Reason (R): Nucleotide is made up of a heterocyclic compound, monosaccharide and nitrogenous base.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q8. Assertion (A): Adenine and Guanine are substituted purines.
Reason (R): In Adenine and Guanine purine heterocyclic ring has either amino or amino and oxy groups.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q9. Assertion (A): All living organisms from bacteria to human being show a dynamic state of body constituents.
Reason (R): Such dynamic state of body constituents keep maintain the level of energy and biochemicals required for livingness.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q10. Assertion (A): Living state is a non equilibrium steady state to be able to perform work.
Reason (R): Any system of equilibrium can not work and living organisms work continuously so they can not afford to reach equilibrium.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q11. Assertion (A): In enzyme catalysed reaction there is obligatory formation of an E-S complex.
Reason (R): Such complex formation is a transient phenomenon which leads to creation of transition state structure in which bond making/breaking is completed.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q12. Assertion (A): The activity of an enzyme can be affected by change in the conditions which can alter the tertiary structure of the protein.
Reason (R): Tertiary structure of protein helps in determination of structural specificity of an enzyme.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q13. Assertion (A): When inhibitor closely resembles the substrate in its molecular structure and inhibit the activity of the enzyme then it is known as competitive inhibitor.
Reason (R): Due to close structural similarity with the substrate the inhibitor compete with the substrate for active sites of enzymes.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q14. Assertion (A): Metal ions are important for functioning of cells.
Reason (R): Metal ions may act as cofactor for several enzymes.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q15. Assertion (A): Codon for methionine & tryptophan said to be degenerate.
Reason (R): Methionine and tryptophan amino acids coded by more than one codons.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q16. Assertion (A): Glucose is commonest sugar which provides energy on hydrolysis.
Reason (R): Glucose is the precursor of all the types of carbohydrates.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q17. Assertion (A): All monosaccharides are reducing sugar.
Reason (R): Monosaccharides contain free aldehyde or free ketonic group.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q18. Assertion (A): Cholesterol is an important biochemical.
Reason (R): Cholesterol is parental steroid it plays important role in the synthesis of other biologically active steroid hormones.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q19. Assertion (A): Constant diameter of DNA double helix is 20 Å.
Reason (R): Purines always pair with pyrimidines and vice-versa.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q20. Assertion (A): Sucrose is known as invert sugar.
Reason (R): Sucrose is a disaccharide.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q21. Assertion (A): All monosaccharides give Benedict's test.
Reason (R): All monosaccharides contain free aldehyde or ketonic group.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q22. Assertion (A): Amino acids are interlinked by hydrogen bonds to form secondary structure in a polypeptide chain.
Reason (R): Beta pleated sheet and alpha helices are secondary structures shown by polypeptide chain.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q23. Assertion (A): Enzymes have active sites and substrates has reactive sites, on their surfaces respectively.
Reason (R): Active and reactive sites push the enzyme and substrate molecules away from each other.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q24. Assertion (A): Enzymes are defined as biological proteins.
Reason (R): Chemically all enzymes are globular proteins (with few exceptions).

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q25. Assertion (A): Water accounts for about 80 to 90% of a plant cell's expansion.
Reason (R): Enzymes are active in hydrated medium only.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q26. Assertion (A): Deoxyribose, C₅H₁₀O₄ is not exactly hydrate of carbon.
Reason (R): Carbohydrates are hydrates of carbon so compounds which follow Cₓ(H₂O)ᵧ formula are carbohydrates.

hard

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q27. Assertion (A): All the polysaccharides are homopolymers.
Reason (R): All the polysaccharides contain repeating units of glucose.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q28. Assertion (A): In solutions of different pH, the structure of amino acids changes.
Reason (R): A particular property of amino acids is the ionizable nature of –NH₂ and –COOH groups.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q29. Assertion (A): Dietary proteins are the source of essential amino acids.
Reason (R): Amino acids are organic compounds containing an amino group and an acidic group as substituents on the same carbon.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q30. Assertion (A): Lipids separate in the macromolecular fraction of a cell.
Reason (R): Lipids are associated with membranes in a cell.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q31. Assertion (A): Enzyme catalysed reactions proceed at rates vastly higher than that of uncatalysed ones.
Reason (R): Enzymes require an optimum temperature and optimum pH to work efficiently.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q32. Assertion (A): The starch-I₂ is blue in colour.
Reason (R): Starch forms helical secondary structures and can hold I₂ molecules in the helical portion.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q33. Assertion (A): With the increase in substrate concentration, the velocity of the enzymatic reaction rises at first but ultimately reaches a maximum velocity which is not exceeded by any further rise in concentration of the substrate.
Reason (R): The enzyme molecules are fewer than the substrate molecules and after saturation of these molecules, there are no free enzyme molecules to bind with the additional substrate molecules.

medium

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Q34. Assertion (A): Dietary proteins are the source of essential amino acids.
Reason (R): All essential amino acids are aromatic.

easy

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

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Biology - Bimolecules-A & R questions

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Biology - Bimolecules-A & R questions

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