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. 1915
- B. 1920
- C. 1910
- D. 1820
Explanation: Bacteriophages were first discovered by Frederick W. Twort in 1915. While working with Staphylococcus colonies, he noticed that some of…
Correct answer: 1915- A. DNA-enveloped virus
- B. RNA-enveloped virus
- C. DNA non-enveloped virus
- D. RNA non-enveloped virus
Explanation: Viruses are classified by genome type and presence of an envelope. RNA-enveloped viruses (e.g., influenza, HIV) have RNA with a capsid and…
Correct answer: DNA-enveloped virus- A. Charles Darwin (1859)
- B. Rudolph virchow (1855)
- C. Louis Pasteur (1862)
- D. Carolus Linnaeus (1707)
Explanation: Tyrannosaurus rex is probably the most widely known binomial. The formal introduction of this system of naming species is credited to Carl…
Correct answer: Carolus Linnaeus (1707)424. Which of the following best characterizes the viruses with un-enveloped plus- (I point) strand RNA?
- A. Lacking envelope
- B. Having DNA
- C. Act indirectly
- D. Enveloped
Explanation: Lacking envelope: As indicated by their name, un-enveloped plus-strand RNA viruses lack envelopes and consist only of a nucleic acid core…
Correct answer: Lacking envelope- A. Cat
- B. Fox
- C. Dog
- D. Pig
Explanation: Rabies is most often spread by small, mammals such as dogs, racoons and foxes, most commonly by dogs.The rabies virus is spread by the…
Correct answer: Dog- A. Hepatitis A
- B. Hepatitis B
- C. Hepatitis C
- D. Hepatitis D
Explanation: Hepatitis B spreads through contact with infected body fluids. This includes blood, serum, saliva, breast milk, and it can also be passed…
Correct answer: Hepatitis B- A. Pompe disease
- B. Gaucher's disease
- C. Tay-Sachs disease
- D. Krabbe's disease
Explanation: Tay-Sachs disease is a genetic disorder where the enzyme Hexosaminidase A is absent.
Correct answer: Tay-Sachs disease- A. They survive for a short time.
- B. They are tolerant to antibodies.
- C. Their envelope is sensitive to sunlight.
- D. Envelope is derived from host..
Explanation: Enveloped viruses are less resistant to antibodies or disinfectants and can be easily destroyed.
Correct answer: They are tolerant to antibodies.- A. Glycolipid
- B. Cholesterol
- C. Glycoprotein
- D. Phospholipid
Explanation: Cholesterol is a component of eukaryotic cell membranes and is typically absent in prokaryotic cell membranes, such as those of bacteria.
Correct answer: Cholesterol- A. Kingdom Protista
- B. Kingdom Fungi
- C. Kingdom Plantae
- D. Kingdom Animalia
Explanation: Organisms with multicellular structures, heterotrophic nutrition, and the absence of cell walls in their cells belong to the Kingdom…
Correct answer: Kingdom Animalia- A. Viroid
- B. Prions
- C. Virus
- D. Virion
Explanation: Prions are infectious proteins that do not have genetic material and are composed of a misfolded host protein.
Correct answer: Prions- A. HIV
- B. Influenza virus
- C. Morbilli virus (Measles)
- D. Vibrio Cholerae (Cholera)
Explanation: HIV (Human Immunodeficiency Virus) is primarily transmitted through several key routes.
Correct answer: HIV- A. Adenovirus
- B. Herpes virus
- C. Parvovirus
- D. Pox virus
Explanation: Parvoviruses are a group of viruses that carry a single-stranded DNA genome.
Correct answer: Parvovirus- A. Aerobic respiration
- B. External respiration
- C. Internal respiration
- D. Anaerobic respiration
Explanation: During the process of baking, anaerobic respiration is used by yeast to convert sugars in dough into carbon dioxide gas, which causes the…
Correct answer: Anaerobic respiration- A. Cellular agent
- B. Infectious agent
- C. Non-infectious agent
- D. Non-protein agent
Explanation: Viruses are regarded as infectious agents because they enter and take over host cells, leading to various diseases.
Correct answer: Infectious agent- A. Interferons
- B. Histone
- C. Antigen
- D. Serum
Explanation: Interferons are proteins that play a key role in controlling viral infections.
Correct answer: Interferons- A. ssRNA
- B. ssDNA
- C. dsRNA
- D. dsDNA
Explanation: The provirus of HIV (Human Immunodeficiency Virus) is structurally and chemically made up of dsDNA (double-stranded DNA)HIV, a retrovirus…
Correct answer: dsDNA- A. Bacteria
- B. Fungi
- C. Yeast
- D. Virus
Explanation: Viruses can easily pass through filter paper. Viruses are the smallest type of biological agent, with most being smaller than 0.1…
Correct answer: Virus- A. 4
- B. 6
- C. 8
- D. 10
Explanation: The influenza virus genome is composed of eight pieces of ribonucleic acid (RNA).
Correct answer: 8- A. 6 Sides
- B. 10 Sides
- C. 15 Sides
- D. 20 Sides
Explanation: The head of some phages are icosahedral, which means that the head possesses 20 sides.
Correct answer: 20 Sides