RNA and DNA are chiral molecules, their chirality is due to
A
chiral bases
B
chiral phosphate ester units
C
$$D$$-sugar component
D
$$L$$-sugar component
Explanation
Each nucleic acid consists of a pentose
sugar a heterocyclic base, and phosphoric acid.
The sugar present in DNA is -D (–) -2-deoxy
ribose and the sugar present in RNA is D (–)-
ribose. The chirality of DNA and RNA molecules
are due to the presence of sugar components.
2
AIPMT 2007
MCQ (Single Correct Answer)
Which of the following vitamins is water-soluble?
A
Vitamin E
B
Vitamin K
C
Vitamin A
D
Vitamin B
Explanation
Vitamin B is water soluble whereas all other
are water insoluble.
3
AIPMT 2006
MCQ (Single Correct Answer)
During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process-
are respectively
A
invertase and zymase
B
amylase and maltase
C
diastage and lipase
D
pepsin and trypsin
Explanation
4
AIPMT 2006
MCQ (Single Correct Answer)
Which one of the following is a peptide hormone?
A
Adrenaline
B
Glucagon
C
Testosterone
D
Thyroxine
Explanation
Glucagon is a single chain peptide of 29
amino acids, synthesised by the $$\alpha $$-cells in the islets
of Langerhans of the pancreas.
Questions Asked from Biomolecules
On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
