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. Attachment
- B. Fimbriae
- C. Sex pili
- D. Flagella
Explanation: Flagella are extremely thin hair like appendages, whereas pili are non-helical, filamentous appendages.
Correct answer: Flagella- A. Sarcina
- B. Tetrad
- C. Streptococcus
- D. Staphylococcus
Explanation: When cocci divides in three plane it forms cube of 8 cocci or sarcina. Sarcina is a genus of bacteria characterized by their distinctive…
Correct answer: Sarcina- A. Cocci
- B. Bacilli
- C. Spirilli
- D. Repulsion
Explanation: Cocci bacteria, which are characterized by their spherical or ovoid shape, typically do not have flagella.
Correct answer: Cocci2344. Bacteria can also detect and move in response to chemical signals. This type of behavior is called:
- A. Chemotropism
- B. Chemotaxis
- C. Locomotion
- D. Repulsion
Explanation: Chemotaxis is the biological process by which cells, typically microorganisms such as bacteria, move in response to chemical gradients in…
Correct answer: Chemotaxis- A. Spirochaete
- B. Pseudomonas
- C. Spirillum
- D. Rhizobium
Explanation: Spirillum is a type of bacterium characterized by its spiral or helical shape. Spirilla are often elongated and have a rigid structure.
Correct answer: Spirillum- A. Monotrichous
- B. Lophotrichous
- C. Amphitrichous
- D. Peritrichous
Explanation: "Monotrichous" is a term used to describe the arrangement of flagella on a bacterial cell.
Correct answer: Monotrichous- A. Flagella
- B. Pilli
- C. Trichomes
- D. Plasmids
Explanation: These are hollow, nonhelical, filamentous appendages. Pili are smaller than flagella and are not involved in motility.
Correct answer: Pilli- A. Nuclear body
- B. Chromatin body
- C. Nuclear region
- D. Nucleus
Explanation: The nucleus is a membrane-bound organelle found in eukaryotic cells. It is often referred to as the "control center" of the cell since it…
Correct answer: Nucleus- A. Spirochetes
- B. Diplococci
- C. Streptococci
- D. Cocci
Explanation: Spirochetes are a group of bacteria that are characterized by their spiral shape.
Correct answer: Spirochetes- A. Flagella
- B. Plasmid
- C. Mesosome
- D. Pili
Explanation: Pili (singular: pilus) are hair-like appendages on the surface of bacteria.
Correct answer: Pili- A. 100
- B. 200
- C. 300
- D. 400
Explanation: This is a fact that you will need to remember that Certain electromagnetic radiations below 300 nm are effective in killing of…
Correct answer: 300- A. Cell membrane
- B. Nucleoid
- C. Ribosomes
- D. Capsule
Explanation: The capsule is a slimy, protective layer that surrounds some bacterial cells.
Correct answer: Capsule- A. Paramecium
- B. Amoeba
- C. Plasmodium
- D. Lactobacillus
Explanation: Lactobacillus is a genus of bacteria, and bacteria do not have nuclei in the same way that eukaryotic cells (such as protists) do.
Correct answer: Lactobacillus- A. Streptococci
- B. Staphylococci
- C. Tetrad
- D. Sarcina
Explanation: Streptococci is the correct answer. Streptococci refer to a chain-like arrangement of spherical bacteria (cocci).
Correct answer: Streptococci- A. Fibrin
- B. Tubulin
- C. Keratin
- D. Flagellin
Explanation: The flagella of bacteria are composed of flagellin, which is a protein.
Correct answer: Flagellin- A. Cocci
- B. Bacilli
- C. Pseudomonas
- D. Spirillum
Explanation: A spirillum is a type of bacteria that has a spiral shape. They are typically rod-shaped, but they have a helix that can vary in length…
Correct answer: Spirillum- A. Cytoplasmic matrix
- B. Cytoplasm
- C. Protoplast
- D. Cell Structure
Explanation: A bacterial protoplast refers to a bacterial cell that has had its cell wall removed or partially digested, leaving only the cell membrane…
Correct answer: Protoplast- A. Unicellular
- B. Lack of membrane-bound organelle
- C. Lack of a nucleus
- D. They are found in protists and fungi
Explanation: Prokaryotic cells are not typically found in protists or fungi. Instead, prokaryotic cells are a characteristic of bacteria and archaea.
Correct answer: They are found in protists and fungi- A. Flagella
- B. Capsule
- C. Gas vesicles
- D. None of these
Explanation: Cyanobacteria, also known as blue-green algae, can exhibit motility through a few different mechanisms, although many species are…
Correct answer: Gas vesicles- A. Mesosomes and cell membrane
- B. Cell membraneand ribosome
- C. Mesosomes and ribosomes
- D. All of Above
Explanation: The cell membrane regulates the transport of proteins, nutrients, sugar, and electrons or other metabolites.
Correct answer: Mesosomes and cell membrane