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. Nucleoid
- B. Pili
- C. Plasmid
- D. Cell wall
Explanation: The nucleoid is a region within bacterial cells where the genetic material (DNA) is located.
Correct answer: Nucleoid- A. Cell wall
- B. Capsule
- C. SIime
- D. Cell membrane
Explanation: The correct answer is C) Slime, as it is the type of glycocalyx that is loosely attached to the bacterial cell.
Correct answer: SIime- A. Virions
- B. Prions
- C. Viroids
- D. Non-enveloped viruses
Explanation: The correct answer is B) Prions, as they are particles that don't have nucleic acid as their hereditary material.
Correct answer: Prions- A. Envelope
- B. Tail
- C. Nucleic acid
- D. Capsid
Explanation: The correct answer is C) Nucleic acid. The pathogenicity of bacteriophages is primarily due to their nucleic acid, which carries the…
Correct answer: Nucleic acid- A. Bacteria
- B. Angiosperms
- C. Viruses
- D. Fungi
Explanation: The correct answer is A) Bacteria, as many antibiotics are obtained from bacteria themselves.
Correct answer: Bacteria- A. Without CO2
- B. Without chlorophyll a
- C. Without pigment
- D. Without light
Explanation: The correct answer is B) Without chlorophyll a, as bacterial photosynthesis can occur using different photosynthetic pigments, such as…
Correct answer: Without chlorophyll a- A. Nucleoid
- B. Cell wall
- C. Cytoplasm
- D. Ribosomes
Explanation: The correct answer is B) Cell wall, as Gram-positive bacteria have a different cell wall structure (thick peptidoglycan layer) compared to…
Correct answer: Cell wall- A. Obligate aerobes
- B. Obligate anaerobes
- C. Microaerophilic
- D. Facultative anaerobes
Explanation: The correct answer is D) Facultative anaerobes, as they can grow in the presence or absence of oxygen.
Correct answer: Facultative anaerobes- A. Dinoflagellates
- B. Liverworts
- C. Rhizobium
- D. Moss
Explanation: The correct answer is C) Rhizobium, as it is a nitrogen-fixing organism that forms symbiotic relationships with certain leguminous plants.
Correct answer: Rhizobium- A. Pox virus
- B. Herpes Virus
- C. Paramyxovirus
- D. Adenovirus
Explanation: The correct answer is B) Herpes Virus, as herpes viruses can cause infections that lead to cold sores or fever blisters on or around the…
Correct answer: Herpes Virus291. Tumor causing virus:
- A. DNA enveloped
- B. DNA non-enveloped
- C. RNA enveloped
- D. RNA non-enveloped
Explanation: The correct answer is C) RNA enveloped, as some RNA enveloped viruses, particularly retroviruses like HTLV-1, are known to cause tumors in…
Correct answer: RNA enveloped- A. E. coli
- B. Mycoplasma
- C. Spirochete
- D. Streptococci
Explanation: The correct answer is B) Mycoplasma, as they are among the smallest known bacteria due to the absence of a cell wall, which contributes to…
Correct answer: Mycoplasma- A. Leucoplast
- B. Phragmoplast
- C. Protoplast
- D. Cytoplasm
Explanation: The correct answer is C) Protoplast, as it refers to the living part of the cell, including the plasma membrane and everything in it.
Correct answer: Protoplast- A. Scrum
- B. Blood
- C. Faeces
- D. Saliva
Explanation: The correct answer is C) Faeces, as Hepatitis A and E are primarily transmitted through contact with fecal matter from infected individuals.
Correct answer: Faeces- A. Mammals
- B. Humans
- C. Bacteria
- D. All of these
Explanation: The correct answer is D) All of these, as viruses can infect and parasitize mammals, humans, bacteria, and various other hosts.
Correct answer: All of these- A. Mutation
- B. Genome
- C. Replication
- D. Crystallization
Explanation: The correct answer is D) Crystallization, as it is not a living characteristic of the virus
Correct answer: Crystallization- A. HIV
- B. TMV
- C. HBV
- D. T2
Explanation: Based on the information provided in the options, the correct answer is B) TMV, as Wendell Stanley is associated with crystallizing the…
Correct answer: TMV- A. Sheath
- B. Core
- C. Head
- D. Tail
Explanation: The correct answer is D) Tail, as the tail of the bacteriophage is responsible for attaching to the bacterial cell surface.
Correct answer: Tail- A. Replication
- B. Transcription
- C. Translation
- D. All of these
Explanation: The correct answer is D) All of these, as replication, transcription, and translation all take place during the lytic cycle of viral…
Correct answer: All of these- A. HIV infection
- B. Reverse transcription in HIV particle
- C. Destruction of T cells
- D. Cure after proper medication
Explanation: The false statement is D) Cure after proper medication, as there is currently no cure for HIV/AIDS.
Correct answer: Cure after proper medication