Free Biodiversity and Variety of Life MCQs with Answers
3,130 Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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- A. Purple spheres
- B. Clear rods
- C. Pink rods
- D. Purple spirals
Explanation: Methicillin-resistant Staphylococcus aureus (MRSA) is a type of Gram-positive bacterium that is resistant to multiple antibiotics…
Correct answer: Purple spheres- A. Gram-positive bacteria
- B. Gram-negative bacteria
- C. Chemosynthetic bacteria
- D. None of above
Explanation: Pili, are more commonly found in Gram-negative bacteria. While some Gram-positive bacteria may have surface appendages or structures that…
Correct answer: Gram-negative bacteria- A. Motility
- B. Conjugation
- C. Chemical detection
- D. None of above
Explanation: Based on the explanations provided, the correct answer to the question is option B) Conjugation.
Correct answer: Conjugation- A. Staphylococci
- B. Pseudomonas
- C. Diplococcus pneumonia
- D. Mycoplasmas
Explanation: Based on the explanations provided, the correct answer to the question is option D) Mycoplasmas.
Correct answer: Mycoplasmas- A. Cell membrane
- B. Chromatin
- C. Ribosome
- D. Capsule
Explanation: Based on the explanations provided, the correct answer to the question is option D) Capsule.
Correct answer: Capsule- A. Conjugation
- B. Transformation
- C. Transduction
- D. Binary Fission
Explanation: Based on the explanations provided, the correct answer to the question is option D) Binary Fission.
Correct answer: Binary Fission- A. Cocci
- B. Bacilli
- C. Streptobacillus
- D. Vibrio
Explanation: Based on the explanations provided, the correct answer to the question is option A) Cocci. Cocci bacteria do not commonly have flagella.
Correct answer: Cocci- A. The bacteria is anaerobic
- B. The bacterial sample was pretreated with 3% ethanol
- C. The bacteria's periplasmic space
- D. The bacteria's thick peptidoglycan cell walls
Explanation: Based on the explanations provided, the correct answer to the question is option D) The bacteria's thick peptidoglycan cell walls.
Correct answer: The bacteria's thick peptidoglycan cell walls- A. Protein
- B. Enzyme
- C. Chemical
- D. None of above
Explanation: Flagella is composed of protein flagellin.
Correct answer: Protein- A. Absence of membrane bound cell organelles
- B. Absence of nucleus
- C. Presence of 70S ribosomes
- D. All of these
Explanation: Prokaryotes lack membrane-bound organelles such as mitochondria. They do not contain a nucleus as there is no membrane separating the…
Correct answer: All of these- A. To give cells rigidity
- B. To give specific shape
- C. To protect from osmotic lysis
- D. All of the above
Explanation: The cell wall provides structural support to the cell, preventing it from collapsing under its internal pressure.
Correct answer: All of the above- A. Eubacteria
- B. Archaeobacteria
- C. Cyanobacteria
- D. None of above
Explanation: Eubacteria, also known as true bacteria or bacteria, are a major group of prokaryotic microorganisms.
Correct answer: Eubacteria- A. Diplococcus
- B. Tetrad
- C. Peritriehous
- D. Monotrichous
Explanation: A type of bacterial cell that is completely surrounded by flagella is called peritrichous.
Correct answer: Peritriehous- A. Spores
- B. Cysts
- C. Granules
- D. All of Above
Explanation: Spores are the most heat resistant form of bacteria. They are formed by some bacteria when environmental conditions become very harsh.
Correct answer: Spores- A. It forms a bridge between two bacterial cells
- B. It involves transport of genetic material via vectors
- C. It is a form of sexual reproduction
- D. Both B and C
Explanation: The answer is Both B and C.Bacterial conjugation is a form of horizontal gene transfer, which is the transfer of genetic material between…
Correct answer: Both B and C- A. Proteins
- B. Lipids
- C. Enzymes
- D. Chemicals
Explanation: ATP synthase: This enzyme is responsible for the synthesis of ATP from ADP and phosphate.
Correct answer: Enzymes- A. Binary fission and mitosis
- B. Binary fission and meiosis
- C. Binary fission and transformation
- D. Binary fission
Explanation: Prokaryotic cells divide through a form of asexual reproduction called binary fission.
Correct answer: Binary fission- A. Glycoproteins
- B. Polysaccharides
- C. Proteins
- D. Peptidoglycan
Explanation: Archaebacteria doesn't contain peptidoglycan.
Correct answer: Peptidoglycan- A. Cilia
- B. Flagella
- C. Pili
- D. Pseudopodia
Explanation: Flagella are long thread like structures which are used for locomotion.
Correct answer: Flagella- A. Nuclear body
- B. Nuclear region
- C. Nucleoid
- D. All of Above
Explanation: Chromatin bodies in prokaryotes is termed as Nuclear Body, Nuclear region and Nucleoid.
Correct answer: All of Above