See Also: 100 General Science MCQs For Competetive Tests
50 Biology MCQs on Introductory Topics for Competetive Exams
- Which of the following is an example of a prokaryotic cell?
a) Plant cell
b) Animal cell
c) Bacterial cell
d) Both a and b - The process by which a cell divides its nucleus to form two or more nuclei is called:
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Both a and c - The flow of energy through an ecosystem is typically represented by:
a) Food web
b) Food chain
c) Nutrient cycle
d) Trophic level - The process by which organisms obtain energy from organic compounds is known as:
a) Photosynthesis
b) Chemosynthesis
c) Cellular respiration
d) Fermentation - Mendel’s law of independent assortment states that:
a) Alleles of different genes are inherited independently
b) Alleles of the same gene are inherited independently
c) Traits are determined by dominant and recessive alleles
d) Both a and b - Which of the following is NOT a mechanism of evolution?
a) Mutation
b) Genetic recombination
c) Horizontal gene transfer
d) Lamarckian inheritance - The theory that proposes that new species arise through the sudden appearance of large, inheritable variations is called:
a) Gradualism
b) Catastrophism
c) Punctuated equilibrium
d) Creationism - The ability of an organism to maintain a stable internal environment is called:
a) Adaptation
b) Homeostasis
c) Acclimation
d) Regulation - The branch of biology that studies the relationships between organisms and their physical environment is known as:
a) Ecology
b) Ethology
c) Taxonomy
d) Physiology - The principle that all living things are composed of one or more cells is known as:
a) The cell theory
b) The germ theory
c) The theory of evolution
d) The law of biogenesis
A molecular biologist and aspiring bioinformatician with a passion for genomics, rare diseases, and precision medicine. With an MPhil in Molecular Biology and experience in genetics and genomics, he has contributed to clinical research projects on rare genetic disorders. He’s passionate about making genomic data meaningful — and ultimately helpful — for patients and clinicians alike.