Question

Molecular biology is the study of
A. Structure, function and cell reproduction.
B. Physio-biochemical studies of biomolecules.
C. Studying tissues under a microscope.
D. Metabolic activity of life.

Answer 1

Hint:-Biology is the branch of natural science in which we study life and living organisms present in our universe. Molecular biology is the field of biology that is concerned with the molecular basis of life.

Complete answer:
Molecular biology was first described by the scientist William Astbury in 1961. Molecular biology deals with the activity in and between the cells including their synthesis, modification, and interactions between them. It is a combination of biochemistry and genetics. In other words, it is the study of biomolecules and the composition, nature, and structure of cellular molecules including nucleic acids, proteins, sugars which carry the biological processes, and other bigger molecules such as DNA and RNA, which carry genetic information and are passed from one generation to the next.
Molecular biology is the study of macromolecules and their mechanisms present in all living organisms, for example, genes and different mechanisms related to them such as mutation, replication, and expression.

Additional information: The study of molecular biology started with the study of the nature of inheritance. For this purpose, scientists from many fields such as genetics, physics, and chemistry came together with their conceptual approaches to determine the structure of double-stranded DNA which was found to be the informational molecule. They also studied other related concepts about the genes.

So, the correct option is (B) Physio-biochemical studies of biomolecules.

Note:- The field of molecular biology which deals with clinical research and medical therapies is known as gene therapy, and the field of molecular biology which deals with the production of medicines is known as molecular medicine.