Proteins
Proteins: Overview
This Topic covers sub-topics such as Proteins, Amino Acid, Structure of Haemoglobin, Primary Structure of a Protein, Secondary Structure of Protein, Peptide Bond, Tertiary Structure of a Protein, Quaternary Structure of Protein and, Polypeptides
Important Questions on Proteins
Cellulose is major component in plants while collagen in animals.
Explain the triple helical structure of the collagen.
The short chain of amino acids that are linked by peptide bonds is called a polypeptide.
Write a note on the properties of fibrous proteins.
_____ (Lecithin/Pectin/Haemoglobin) is an example of globular protein.
Biuret Test is used for testing of _____ (lipids/proteins).
Biuret test is performed for the testing of carbohydrates.
The following diagram illustrates a common food test:
Identify the substance 'X'
Which fibrous protein is the major constituent of the fibrous protein? (Answer in a single word)
Arrange the following four levels of protein structures - Primary (I), Secondary (II), Tertiary (III), and Quaternary (IV) in a correct match:
I | First terminal , Last terminal |
1 Polypeptide |
II | Right-handed, Helical polypeptide | 1 Polypeptide |
III | Long-chain folded like a ball | 2 Polypeptides |
IV | Protein subunits present | More than one Polypeptides |
Assertion (A): Glucose Glucose Phosphate .
Reason (R): The enzyme which catalyzes this reaction belongs to the enzyme class "transferase".
The correct answer is:
Identify the amino acids containing a hydroxyl group in their structure:
i) Cysteine
ii) Threonine
iii) Tyrosine
iv) Glutamic acid
The most abundant protein in the human body is _________.
Select the neutral amino acid among the following.
Find the wrong statement:
(A) Polymers of polysaccharides, fats and proteins are synthesised from monomers by ionic bonding.
(B) Molecules with polar heads and hydrophobic tails are present in the cell membrane.
(C) Left end of the protein chain is N-terminal end.
(D) Right and left-handed helices are observed in protein.
The correct answer is
Which of the following is an incorrect statement?