Proteins

Cellulose is major component in plants while collagen in animals.

Explain the triple helical structure of the collagen.

Describe the formation of polypeptide bonds.

The short chain of amino acids that are linked by peptide bonds is called a polypeptide.

Write a short note on the fibrous proteins.

Write a note on the properties of fibrous proteins.

_____ (Lecithin/Pectin/Haemoglobin) is an example of globular protein.

Mention the properties of globular proteins.

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:

Assertion (A): Glucose $+\mathrm{ATP}\stackrel{\text{ Hexokinase }}{⟶}$ Glucose $-6-$ Phosphate $+\mathrm{ADP}$.

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?

Living organisms have