List of top Chemistry Questions on Biomolecules asked in CBSE CLASS XII

Which of the following statements is not true about glucose?
Assertion (A): All naturally occurring \(\alpha\)-amino acids except glycine are optically active.
Reason (R): Most naturally occurring amino acids have L-configuration.
Write the reactions involved when D-glucose is treated with the following reagents:
(a) HCN
(b) Br\(_2\) water
Which vitamin is responsible for the coagulation of blood?
Which one of the following is a disaccharide?
\[ \text{Glucose, Lactose, Amylose, Fructose} \]
What is the difference between native protein and denatured protein?
Which functional groups of glucose interact to form cyclic hemiacetal leading to pyranose structure?
‘Scurvy’ is caused by the deficiency of vitamin:
Two among the three components of DNA are $\beta$-D-2-deoxyribose and a heterocyclic base. The third component is:
What happens when D-glucose is treated with the following reagents?
Define the following terms:
(a) Denaturation of protein
(b) Invert sugar
Write the main product in each of the following reactions: 
oxidation of the hydroboration product
What type of linkages hold monomers of proteins together?
Give one example each for Fibrous protein and Globular protein.
What is meant by zwitter ionic form of amino acids?
What are essential amino acids?
In aqueous media, which is a stronger reducing agent — Cr³⁺ or Fe³⁺ and why?
Write the reactions of glucose with
(a) HI
(b)\((CH_3CO_2)O\)