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. Master
- B. Inducer
- C. Guest
- D. Slave
Explanation: Bacteriophage is called master in lytic cycle.In lytic cycle,virus takes the charge of the metabolic machinery of the host and order it to…
Correct answer: Master- A. Animal cell
- B. Bacterial cell
- C. Fungal cell
- D. Both A & B
Explanation: Bacteriophages, also known as phages, are viruses that infect and replicate only in bacterial cells.
Correct answer: Bacterial cell- A. Protein sheath
- B. Genome
- C. Protein coat
- D. Tail
Explanation: Genome of bateriophage enters the host cell.Here is the explaination of each of the options:1.
Correct answer: Genome- A. Anywhere on the cell
- B. Adhering surface
- C. Receptor site
- D. Binding site
Explanation: Bacteriophage attaches on specific receptor site on the surface of bacterial cell.The bacteriophage replicates only inside the bacterial…
Correct answer: Receptor site- A. Viral DNA becomes incorporated into the host DNA.
- B. Host cell produces many new viruses before it breaks apart.
- C. The viral DNA replicates and it is separated by the cell's spindle apparatus
- D. Antiviral defenses of the cell expel the viral DNA
Explanation: The virus uses the host to help copy its DNA or genetic information, but it is not producing any proteins.In the lysogenic cycle of a…
Correct answer: Viral DNA becomes incorporated into the host DNA.- A. Dehydrogenase
- B. Urease
- C. Lysozyme
- D. Arginase
Explanation: Lysozyme is an ubiquitous enzyme present in all living organisms and viruses to breakdown cell walls.
Correct answer: Lysozyme- A. Influenza
- B. Polio
- C. Mumps
- D. Herpes
Explanation: Lesions around the mouth and lips are most commonly associated with herpes (specifically HSV-1).
Correct answer: Herpes- A. Mumps
- B. Small pox
- C. Herpes simplex
- D. Influenza
Explanation: Mumps belongs to group paramyxoviruses. It is highly contagious and this disease cause painful swelling of parotid glands.Mumps is a viral…
Correct answer: Mumps- A. Influenza
- B. Polio
- C. Mumps
- D. Tetanus
Explanation: So, among the options, "Tetanus" is not a viral disease; it's a bacterial infection caused by Clostridium tetani.
Correct answer: Tetanus- A. ssRNA
- B. dsRNA
- C. dsDNA
- D. ssDNA
Explanation: Viruses can be classifying on the bases of genome, HAV contains single standard RNA.
Correct answer: ssRNA- A. Blood
- B. Scrum
- C. Fecal oral route
- D. Syringes
Explanation: The virus spreads by the fecal-oral route, and infections often occur in conditions of poor sanitation and overcrowding.
Correct answer: Fecal oral route- A. Sensory neuron
- B. Brain
- C. Motor neuron
- D. Muscles
Explanation: Poliovirus replicates in oropharynx, intestine and spread through blood to nervous system.
Correct answer: Motor neuron- A. DNA Naked Virus
- B. RNA Enveloped Virus
- C. RNA Naked Virus
- D. DNA Enveloped Virus
Explanation: Poxvirus is DNA enveloped virus, which caused epidemic in the past causing samII pox, but now this disease, has been eradicated from the…
Correct answer: DNA Enveloped Virus- A. Virus
- B. Virion
- C. Viroid
- D. Prion
Explanation: Prions are infectious particles made up of only proteins containing information for replication and cause mad cow infection and mysterious…
Correct answer: Prion- A. Infections Hepatitis
- B. Scrum Hepatitis
- C. Infusion Hepatitis
- D. Delta Hepatitis
Explanation: Hepatitis C virus is RNA enveloped virus that causes infusion hepatitis.
Correct answer: Infusion Hepatitis- A. Hepatitis A
- B. Hepatitis B
- C. Hepatitis C
- D. Hepatitis E
Explanation: Most recent work of Halbur and coworker (2001) reveals that pig could be the source of infection of hepatitis E.
Correct answer: Hepatitis E- A. By the host cell
- B. On the interior surface of viral membrane
- C. On the viral ribosomes
- D. On the interior surface of viral coat
Explanation: Viruses are obligate intracellular parasites. They use host biosynthetic machinery for protein synthesis.
Correct answer: By the host cell- A. Hepatitis C
- B. Hepatitis B
- C. Hepatitis A
- D. Hepatitis D
Explanation: Ribavirin is an antiviral medication used in combination with other drugs to treat Hepatitis C.
Correct answer: Hepatitis C- A. HCV
- B. HSV
- C. HIV
- D. Pox virus
Explanation: Different viruses attack different parts of human body such as hepatitis virus affects liver and polio virus affects nervous system.
Correct answer: HSV- A. Rabies, Measles
- B. Cholera, Tuberculosis
- C. Typhoid, Tetanus
- D. AIDS, Syphilis
Explanation: Cholera, typhoid, tuberculosis, syphilis and tetanus are bacterial diseases.
Correct answer: Rabies, Measles