• 072920 77839
  • info@smartachievers.in
Menu
Back
  • JEE ADVANCE
  • JEE MAIN
  • NEET
  • BITSAT
  • CBSE BOARD
  • UP BOARD
  • CUET
  • Other Competitive Exams
JEE ADVANCE
  • CLASS XI - XII
  • CRASH COURSE
JEE MAIN
  • CLASS XI - XII
  • CRASH COURSE
CRASH COURSE
NEET
  • CLASS XI - XII
  • CRASH COURSE
BITSAT
  • CLASS XI - XII
CBSE BOARD
  • CLASS IX
  • CLASS X
  • CLASS XI
  • CLASS XII
  • CLASS VI
  • CLASS VII
  • CLASS VIII
UP BOARD
  • CLASS IX
  • CLASS X
  • CLASS XI
  • CLASS XII
CUET
  • CRASH COURSE
Other Competitive Exams
  • NDA
Courses

Topic Question Set

Q 11 :

Identify the correct pair having amino acid (A) and the hormone (B) that is iodinated derivative of the amino acid (A).

(T and Y represent one letter code for amino acids)               [2026]

  • Amino acid (A)Hormone (A)TInsulin

     

  • Amino acid (A)Hormone (A)TThyroxine

     

  • Amino acid (A)Hormone (A)YThyroxine

     

  • Amino acid (A)Hormone (A)YInsulin

     

(3)

Thyroxine produced in the thyroid gland is an iodinated derivative of amino acid tyrosine(Y).

 

Q 12 :

Match List - I with List - II.

  List - I(Name of amino acid)   List - II(One letter symbol/type)
A. Arginine I. D / Non-essential
B. Aspartic acid II. R / Essential
C. Lysine III. E / Non-essential
D. Glutamic acid IV. K / Essential

Choose the correct answer from the options given below:           [2026]

  • A-II, B-I, C-IV, D-III

     

  • A-IV, B-III, C-II, D-I

     

  • A-III, B-IV, C-I, D-II

     

  • A-II, B-IV, C-I, D-III

     

(1)

Fact based

 

Q 13 :

Identify the incorrect statement about tertiary structure of proteins.               [2026]

  • The can be fibrous or globular in structure.

     

  • The main forces that stabilize the structure are hydrogen bonding, disulphide links, van der Waals and electrostatic forces of attraction.

     

  • The structure remains intact when exposed to pH changes.

     

  • A linear polypeptide chain will convert to a secondary structure and then further folding of the secondary structure will convert to tertiary structure.

     

(3)

When a protein in its native form, is subjected to physical change like change in temperature or chemical change like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturation of protein. During denaturation secondary and tertiary structures are destroyed but primary structure remains intact.

 

Q 14 :

Match List - I with List - II.

  List - I(Amino acid)   List - II(Positive reaction/Test forfunctional group presentin side chain of amino acid)
A. Glutamine I. Hinsberg's test
B. Lysine II. Neutral FeCl3 test
C. Tyrosine III. Ceric ammonium nitrate test
D. Serine IV. Hoffman bromamide degradation

Choose the correct answer from the options given below:               [2026]

  • A-IV, B-II, C-I, D-III

     

  • A-IV, B-I, C-II, D-III

     

  • A-III, B-II, C-I, D-IV

     

  • A-IV, B-I, C-III, D-II

     

(2)

Amino acid Structure Test
Glutamine

[IMAGE 292]

As it has amide functional group, it gives Hoffmann Bromamide degradation reaction.
Lysine

[IMAGE 293]

It has a primary amine group, hence gives Hinsberg test.
Tyrosine

[IMAGE 294]

It has a phenolic group, hence gives neutral ferric chloride test.
Serine

[IMAGE 295]

It has an alcoholic group, hence gives ceric ammonium nitrate test.

 

Q 15 :

Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution?         [2026]

  • Threonine

     

  • Serine

     

  • Tyrosine

     

  • Cysteine

     

(3)

[IMAGE 296]

As Tyrosine has a phenolic group. It gives violet colour with neutral ferric chloride solution.