Previous Year Repeated Questions on Biology

Biology is a crucial subject for NEET aspirants, and it covers a vast range of topics. It is essential to understand the concepts and practice them regularly. Here are some of the previous year repeated questions on Biology:

Question 1: What is the function of Ribosomes in a cell?

Ribosomes are small, spherical structures that are present in the cytoplasm of a cell. They are made up of RNA and proteins and have two subunits. The function of ribosomes is to synthesize proteins by reading the genetic code present in the messenger RNA (mRNA).

Question 2: What is the difference between Prokaryotic and Eukaryotic cells?

Prokaryotic cells are unicellular organisms that lack a nucleus and other membrane-bound organelles. Examples of prokaryotic cells are bacteria and archaea. Eukaryotic cells are complex, multicellular organisms that have a nucleus and various membrane-bound organelles. Examples of eukaryotic cells are animals, plants, fungi, and protists.

Question 3: What is the function of Mitochondria in a cell?

Mitochondria are organelles that are present in the cytoplasm of a cell. They are often referred to as the powerhouses of the cell as they produce energy in the form of ATP through cellular respiration. Mitochondria have an outer and inner membrane, and the inner membrane has folds called cristae that increase the surface area for ATP production.

Question 4: What is the difference between DNA and RNA?

DNA (Deoxyribonucleic acid) is a double-stranded molecule that contains the genetic code of an organism. It is found in the nucleus of a cell and is responsible for the transmission of genetic information from one generation to another. RNA (Ribonucleic acid) is a single-stranded molecule that is involved in protein synthesis. It is found in the cytoplasm of a cell.

Question 5: What is the function of Chloroplasts in a plant cell?

Chloroplasts are organelles that are present in plant cells. They are responsible for photosynthesis, which is the process of converting light energy into chemical energy in the form of glucose. Chloroplasts have a green pigment called chlorophyll, which helps in the absorption of light energy.