Free Introduction to Biology MCQs with Answers

11. Hardy Weinberg is an example of which entity:

• A. Theory
• B. Biological law
• C. Hypothesis
• D. Observation

Explanation: A. Series of hypotheses supported by tests C. Statement per experience and background knowledge D. Based on experimental inquiry

12. Production of genetically identical copies of organisms by asexual reproduction is called as:

• A. Cloning
• B. Genetic engineering
• C. Biological control
• D. Tissue culture technique

Explanation: B. Genes with desirable characters are produced C Control by some living organisms D. Culturing tissues using specific medium

13. Which one of the following is an example of a contagious disease transmitted by blood contact?

• A. Whooping cough
• B. Polio
• C. Anemia
• D. Hepatitis

Explanation: The correct answer is d) hepatitis. Hepatitis is an example of a contagious disease that can be transmitted through blood contact, primarily through direct contact with infected blood or bodily fluids. Whooping cough, polio, and anemia are not primarily transmitted through blood contact.

14. This is a branch of biology that deals with parasites:

• A. Human Biology
• B. Social Biology
• C. Parasitology
• D. Biotechnology

Explanation: Parasitology is the branch of biology that studies parasites, their hosts, and the relationship between them.

15. Which of these is an example of the tissue level in a plant?

• A. Muscle tissue
• B. Glandular tissue
• C. Liver
• D. Phloem tissue

Explanation: Dermal tissue, for example, is a simple tissue that covers the outer surface of the plant and controls gas exchange. Vascular tissue is an example of a complex tissue and is made of two specialized conducting tissues: xylem and phloem.

16. Production of genetically identical copies of organisms by asexual reproduction is called:

• A. Cloning
• B. Genetic engineering
• C. Biological control
• D. Tissue culture technique

Explanation: Cloning is the process of producing genetically identical organisms from a single parent through asexual reproduction.

17. Protons are:

• A. Sub-atomic particles
• B. Atomic particles
• C. Micromolecules
• D. Macromolecules

Explanation: Protons are sub-atomic particles found in the nucleus of an atom. They have a positive charge and, along with neutrons, make up the nucleus.

18. Molecules composed of both carbon and hydrogen are called:

• A. Micromolecule
• B. Macromolecule
• C. Organic molecule
• D. Inorganic molecule

Explanation: Organic molecules are primarily composed of carbon and hydrogen.

19. Sub-cellular structures are known as:

• A. Cells
• B. Organelles
• C. Tissue
• D. Organ

Explanation: Organelles are specialized structures within a cell that perform distinct processes necessary for cellular function.

20. All of the following are double membrane-bounded organelles except:

• A. Mitochondria
• B. Chloroplast
• C. Vacuoles
• D. Nucleus

Explanation: Vacuoles are not typically bound by a double membrane. They are enclosed by a single membrane known as the tonoplast.