Free Introduction to Biology MCQs with Answers
123 Introduction to Biology MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Biology is divided into fields such as botany, zoology, microbiology, genetics, ecology, physiology and biotechnology, each focusing on a different aspect of life. Levels of biological organization progress from atoms and molecules through organelles, cells, tissues, organs and organ systems to organisms, populations, communities, ecosystems and the biosphere.
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Read the Introduction to Biology notesFree MDCAT chapter notes with key terms123 questions · page 5 of 7
- A. Observations - Hypothesis - Law - Theory
- B. Observations - Hypothesis - Deduction - Experimentation
- C. Hypothesis - Observations - Deduction - Experimentation
- D. Law - Theory - Deduction - Observations
Explanation: The correct sequence in the scientific method is observation, hypothesis, deduction, and experimentation.
Correct answer: Observations - Hypothesis - Deduction - Experimentation- A. Increasing food production
- B. Combating disease
- C. Conservation of the environment
- D. All of these
Explanation: The correct answer is all of these. Biology significantly contributes to various fields that benefit humanity.
Correct answer: All of these- A. Selective breeding
- B. Using principles of genetics
- C. Biological control
- D. Both a and b
Explanation: The correct answer is 'Both a and b.'. Plant and animal breeders utilize both selective breeding and principles of genetics to develop…
Correct answer: Both a and b- A. Chicken
- B. Broiler
- C. Cow
- D. Sheep
Explanation: The correct answer is broiler. Broilers are chickens that are specifically bred for meat production and are known for their fast growth…
Correct answer: Broiler- A. Genetic engineering
- B. Cloning
- C. Gene therapy
- D. Biological
Explanation: The correct answer is genetic engineering. This process involves the manipulation of an organism's genome using biotechnology to introduce…
Correct answer: Genetic engineering- A. Clones
- B. Transgenic plants
- C. Eugenic plants
- D. Mutants
Explanation: The correct answer is transgenic plants. These are plants that have been genetically modified to include DNA from another species…
Correct answer: Transgenic plants- A. Introduction of the desired gene into the organism
- B. Replacement of the nucleus of an unfertilized egg with a diploid nucleus of a somatic cell
- C. Produced from a zygote
- D. Asexual reproduction
Explanation: The correct answer is the introduction of a desired gene into the organism.
Correct answer: Introduction of the desired gene into the organism- A. Tissue culture technique
- B. Hydroponic culture technique
- C. Biological control
- D. All of these
Explanation: Astronauts may use hydroponics for growing vegetables in space. Hydroponics is a method of cultivating plants without soil, using…
Correct answer: Hydroponic culture technique- A. Louis Pasteur
- B. Edward Jenner
- C. Gregor Mendel
- D. Beadle and Tatum
Explanation: Edward Jenner is considered the pioneer of the vaccination technique. In 1796, he demonstrated that exposure to cowpox could provide…
Correct answer: Edward Jenner- A. Cloning
- B. Gene therapy
- C. Genetic engineering
- D. Chemotherapy
Explanation: This question tests knowledge of genetic medicine, essential for medical students in biochemistry and molecular biology.
Correct answer: Gene therapy- A. Clone
- B. Mutant
- C. Eugenic organisms
- D. Transgenic organisms
Explanation: The correct answer is "Clone." A clone refers to a cell or organism, along with its entire asexually produced offspring, that is…
Correct answer: Clone- A. Cloning
- B. Hydroponic culture technique
- C. Bioremediation
- D. Tissue culture technique
Explanation: The correct answer is cloning. Cloning is a technology that can be used to achieve eugenic aims by replicating organisms with desirable…
Correct answer: Cloning- A. Genetic engineering
- B. Tissue culture technique
- C. Cloning
- D. Gene therapy
Explanation: Cloning is the process of producing genetically identical individuals, which is ideal for the commercial production of valuable animals…
Correct answer: Cloning- A. Using all methods to combat disease
- B. Participation of community
- C. Both A and B
- D. None of these
Explanation: The correct answer is Option C: 'Both A and B' Integrated disease management is a comprehensive approach that effectively combines various…
Correct answer: Both A and B- A. The method is less effective as compared with the use of insecticides
- B. The practical difficulty of introducing the predator to specific areas
- C. The predator develops a preference for other diets and may itself become a pest
- D. The predator does not always survive when transferred to a new environment
Explanation: Insect enemies play an important role in nature for managing the phytophagous insect pests and keeping a balance.
Correct answer: The predator does not always survive when transferred to a new environment- A. Antisepsis
- B. Disinfection
- C. Disinfestation
- D. Chemotherapy
Explanation: Antisepsis refers to the use of chemicals on living tissues to kill or inhibit bacteria, preventing infections, particularly in medical…
Correct answer: Antisepsis- A. Tissues
- B. Organs
- C. Cells
- D. All of these
Explanation: Organs in plants, such as leaves, stems, and roots, are less distinctly defined compared to the highly specialized organs found in…
Correct answer: Organs- A. Plants
- B. Animals
- C. Bacteria
- D. Viruses
Explanation: The correct answer is plants. While plants do have organs such as roots, stems, and leaves, their organ systems are not as distinct or…
Correct answer: Plants99. A group of different tissues organized to perform a function with great efficiency is known as what?
- A. An organism
- B. An organ
- C. Tissue
- D. Population
Explanation: The correct answer is an organ. An organ is a structure made up of different types of tissues that work together to perform a specific…
Correct answer: An organ- A. Microbiology
- B. Marine Biology
- C. Social Biology
- D. Freshwater Biology
Explanation: The correct answer is freshwater biology. This field specializes in studying organisms that inhabit freshwater environments like rivers…
Correct answer: Freshwater Biology