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. Unicelularity
- B. Lack of membrane bound organelles
- C. A cell wall
- D. Examples are protists and fungi
Explanation: Option D is correct since fungi and protists are classified as eukaryotes. Prokaryotes and Eukaryotes are two different domains.
Correct answer: Examples are protists and fungi- A. Absence of locomotion
- B. Absence of nuclear envelope
- C. Absence of Protein
- D. Absence of nuclear material
Explanation: Prokaryotic life is characterized by the absence of a nucleus and membrane-bound organelles in the cells.
Correct answer: Absence of nuclear envelope- A. Robert Kuch's work
- B. Louis Pasteur's work
- C. Linneaus's work
- D. Ernst Hackel's work
Explanation: Louis Pasteur was the scientist who is credited with definitively proving the existence of microbes.
Correct answer: Louis Pasteur's work- A. Gram-negative bacteria
- B. Gram-positive bacteria
- C. Eubacteria
- D. Ancient bacteria
Explanation: Most of the ancient bacteria must have evolved to form modern bacteria or must have gone extinct, that is the reason for their small number.
Correct answer: Ancient bacteria- A. 0
- B. 1
- C. 3
- D. 2
Explanation: Gram negative and gram positive bacteria contain the same number of membrane bound organelles.
Correct answer: 0- A. Slime
- B. Cell wall
- C. Cell membrane
- D. Capsule
Explanation: Correct option: A slime is an extracellular layer that surrounds a bacterial cell and is composed of exopolysaccharide,glycoprotein and…
Correct answer: Slime- A. Archaebacteria
- B. Lactobacteria
- C. Eubacteria
- D. Anaerobic bacteria
Explanation: Archaebacteria are a distinct group of microorganisms that can survive in extreme environments and are among the oldest forms of life on…
Correct answer: Archaebacteria- A. All bacilli are gram-positive
- B. All bacilli are aerobic
- C. All bacilli are rod-shaped
- D. Both A and B
Explanation: Option D is correct because the question mentions to mention the incorrect options and both options A and B are incorrect about bacilli.
Correct answer: Both A and B- A. Eukarya
- B. Fungi
- C. Protista
- D. Archaea
Explanation: The most likely classification for a single-celled organism with a cell wall lacking a nucleus is Archaea.
Correct answer: Archaea- A. Functional
- B. Conjugation
- C. Normal
- D. Non-functional
Explanation: Coagulation refers to the formation of a solid clot. When bacteria are heated, the bacterial proteins coagulate and become…
Correct answer: Non-functional- A. All of these
- B. Moist heat
- C. Gamma rays
- D. Dry heat
Explanation: Sterilization refers to any process that removes, kills, or deactivates all forms of life and other biological agents like prions present…
Correct answer: All of these- A. Cocci
- B. Bacilli
- C. Streptococcus
- D. Spirochete
Explanation: Mainly, bacteria have three shapes: spherical, rod-shaped, and spiral. 1. Spherical: A coccus is a spherical bacteria.
Correct answer: Spirochete- A. Mycoplasma genitalum
- B. Staphylococcus aureus
- C. Streptococcus pneumoniae
- D. Eulopiscium fishelsoni
Explanation: Epulopiscium is a group of Gram-positive bacteria that have a symbiotic relationship with surgeonfish.
Correct answer: Eulopiscium fishelsoni- A. Capsule
- B. Slime
- C. Spore
- D. Cell wall
Explanation: In the bacterial cell wall, lying between the outer membrane layer and the cytoplasmic membrane is a site where some species of enzymes…
Correct answer: Cell wall- A. Producers
- B. Decomposers
- C. Consumers
- D. Denvers
Explanation: Bacteria and fungi are examples of decomposers, and gain energy from breaking down dead organisms or waste from other organisms.
Correct answer: Decomposers- A. Rapid cure
- B. Increased resistance in pathogen
- C. Disturbance of metabolism
- D. Immunity
Explanation: Misuse and overuse of antibiotics gives the bacteria more chances to develop resistance to that antibiotic, and this resistance can be…
Correct answer: Increased resistance in pathogen- A. Lag phase
- B. Log phase
- C. Death phase
- D. Stationary phase
Explanation: Option A is incorrect because Lag phase is phase of no growth and bacteria prepare themselves for division.Option B is incorrect because…
Correct answer: Stationary phase- A. Actinomycetes
- B. Oomycetes
- C. Ascomycetes
- D. Basidiomycetes
Explanation: Antibiotics are synthesized and secreted by certain bacteria (actinomycetes) and fungi. (PTB)
Correct answer: Actinomycetes- A. Gram-positive bacteria have more lipids in their cell wall
- B. Gram-negative bacteria have more lipids in their cell wall
- C. Lipids are absent in cell wall of both gram positive and negative bacteria
- D. Both have equal amount of lipids
Explanation: Gram-negative bacteria have a more complex cell wall structure compared to gram-positive bacteria.
Correct answer: Gram-negative bacteria have more lipids in their cell wall- A. Staphylococcus
- B. Sarcinae
- C. Streptococci
- D. Cocci
Explanation: Pair of cocci are, called diplococci Rows or chains of cells are called streptococci. Grapelike clusters of cells are staphylococci.
Correct answer: Streptococci