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. AIDS
- B. Genital Herpes
- C. Gonorrhea
- D. Syphilis
Explanation: AIDS (Acquired Immunodeficiency Syndrome) is a serious condition caused by the Human Immunodeficiency Virus (HIV).
Correct answer: AIDS- A. Contain DNA
- B. Can replicate on their own
- C. Can infect bacteria
- D. They have a sub-cellular structure
Explanation: Viruses cannot replicate on their own. They lack the cellular machinery needed for reproduction and must infect a host cell to replicate.
Correct answer: Can replicate on their own- A. Enterovirus
- B. Hepatitis A virus
- C. Flu virus
- D. Polio virus
Explanation: The flu virus, or influenza virus, is an enveloped virus, meaning its genetic material (RNA) is enclosed within a protective lipid…
Correct answer: Flu virus- A. Surrounding the viral core
- B. Inside the capsid
- C. In the protein spikes
- D. Outside the capsid
Explanation: The enzymes required for HIV replication, such as reverse transcriptase and integrase, are indeed found within the capsid of the virus.
Correct answer: Inside the capsid485. Viruses can not:
- A. Crystallize
- B. Mutate
- C. Excrete
- D. Infect bacteria
Explanation: Viruses do not excrete waste in the same way that living organisms do. They are not considered living cells; instead, they are composed of…
Correct answer: Excrete- A. Conduction
- B. Production
- C. Induction
- D. None of the given options
Explanation: Induction occurs when a dormant virus (prophage) in the lysogenic cycle is activated due to stress factors like UV light or chemicals…
Correct answer: Induction- A. Loss of immunity
- B. Loss of T helper cells
- C. Blood cancer
- D. None of the given options
Explanation: Hepatitis mainly leads to inflammation of the liver, and this can show up as jaundice, tiredness, and a general feeling of being unwell.
Correct answer: None of the given options- A. Species
- B. Genus
- C. Family
- D. Order
Explanation: The first word in a scientific name refers to the genus, which groups together closely related species.
Correct answer: Genus- A. Childhood
- B. Adulthood
- C. In old age
- D. Difficult to say
Explanation: Polio is most commonly observed in children under five years old, although adults can also be affected.
Correct answer: Childhood- A. Shape
- B. Nucleic acid
- C. Envelope
- D. All of these
Explanation: Viruses are grouped by their overall shape, the type of genetic material they carry, and whether or not they have an outer envelope.
Correct answer: All of these- A. Plantae
- B. Animalia
- C. Monera
- D. Protista
Explanation: Plants are made up of many cells, and each of these cells has a true nucleus, which puts them in the eukaryotic group.
Correct answer: Plantae- A. Bacteria
- B. Fungi
- C. Algae
- D. Viruses
Explanation: Dmitri Ivanovsky discovered that viruses could pass through filters that trapped bacteria, leading to the discovery of these infectious…
Correct answer: Viruses- A. Hepatitis B
- B. HIV
- C. Rabies
- D. Chicken Pox
Explanation: HIV (Human Immunodeficiency Virus) is a retrovirus that has diploid single-stranded RNA and uses reverse transcription.
Correct answer: HIV- A. They are pathogens and cause infections
- B. They can replicate inside as well as outside the living cells
- C. They cause infections and can only replicate inside living cells
- D. They have a capsid to infect the host
Explanation: They cause infections and can only replicate inside living cells - Correct.
Correct answer: They cause infections and can only replicate inside living cells- A. Hepatitis
- B. Polio
- C. Syphilis
- D. AIDS
Explanation: Syphilis is caused by the bacterium Treponema pallidum, not a virus.It spreads mainly through sexual contact and can progress through…
Correct answer: Syphilis- A. Opium
- B. Alcohol
- C. Tobacco(chewing)
- D. Cocaine
Explanation: Cirrhosis is a condition in which the liver responds to injury or death of some of its cells by producing interlacing strands of fibrous…
Correct answer: Alcohol497. If a person shows production of interferons in his body, the chances are that he has an infection of
- A. Tetanus
- B. Malaria
- C. Typhoid
- D. Measles
Explanation: Interferons are antiviral proteins that increase a cell's resistance to viral attacks.
Correct answer: Measles- A. Tail fibres, Head, Sheath, Collar
- B. Sheath, Collar, Head, Tail fibres
- C. Head, Sheath, Collar, Tail fibres
- D. Collar, Tail fibres, Head, Sheath
Explanation: A-Head, B-Sheath, C-Collar, D-Tail fibreThe head contains the genetic material of the bacteriophage, usually in the form of DNA or RNA…
Correct answer: Head, Sheath, Collar, Tail fibres- A. Free infectious DNA
- B. Infectious protein
- C. Bacteriophage
- D. Free infectious RNA
Explanation: 1. Free infectious DNA-Avery, MacLeod, and McCarty (1944) indeed demonstrated that DNA is the "transforming principle," proving it carries…
Correct answer: Free infectious RNA- A. They require both RNA and DNA.
- B. They both need food molecules.
- C. They both require oxygen for respiration.
- D. Both require the environment of a cell to replicate.
Explanation: The correct answer is that both isolated chromosomes and viruses require the environment of a host cell to replicate because viruses, like…
Correct answer: Both require the environment of a cell to replicate.