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. dsDNA
- B. ssRNA
- C. Single helix DNA
- D. None of these
Explanation: The genetic material in the influenza virus is single-stranded RNA. Influenza viruses are RNA viruses responsible for causing the flu in…
Correct answer: ssRNA- A. 32
- B. 252
- C. 162
- D. 262
Explanation: Option C is correct. The capsid of viruses is made up of protein subunits known as capsomeres.
Correct answer: 162- A. Leukocyte
- B. Monocyte
- C. Helper T-lymphocyte
- D. B-lymphocyte
Explanation: The correct answer is helper T-lymphocytes (option C). Leukocytes are white blood cells involved in immunity, including neutrophils…
Correct answer: Helper T-lymphocyte- A. Nucleic acid only
- B. Protein only
- C. Nucleic acid and protein
- D. Lipoproteins
Explanation: The correct answer is option C, which states that viruses are made up of both nucleic acid and protein.
Correct answer: Nucleic acid and protein505. AIDS is caused by:
- A. Bacteria
- B. Virus
- C. Fungi
- D. Algae
Explanation: Option B is correct. Yes, AIDS is caused by a virus. The virus is called the human immunodeficiency virus (HIV).
Correct answer: Virus- A. Nucleocapsid
- B. Envelope
- C. Capsomeres
- D. Prions
Explanation: Option A is correct. A nucleocapsid is the complex of viral nucleic acid (genome) and protein coat (capsid) that protects the genome and…
Correct answer: Nucleocapsid- A. Lipid
- B. Protein
- C. RNA
- D. DNA
Explanation: Option B is correct. Chemically, a virion is made up of a core of genetic material: either DNA or RNA surrounded by a protective coat…
Correct answer: Protein- A. Viruses
- B. Fungi
- C. Algae
- D. Bacteria
Explanation: Option A is correct. All viruses are obligate intracellular parasites, meaning they can only replicate inside living host cells because…
Correct answer: Viruses- A. 1/10
- B. 1/100 times
- C. 1/50
- D. 1/1000
Explanation: Option D is correct. Viruses are very small. The size of the largest virus (Poxvirus) is almost equal to the size of the smallest…
Correct answer: 1/1000- A. Viruses contain only RNA
- B. Viruses are cellular
- C. Tiny and infectious agent
- D. Independent metabolic activities.
Explanation: Viruses are tiny infectious agents that lack many of the key characteristics of living things.
Correct answer: Independent metabolic activities.- A. Animal cells
- B. Bacterial cells
- C. Living cells
- D. Non-living cells
Explanation: Option C is correct. Viruses are obligate intracellular parasites that can only reproduce inside living cells, whether plant, animal, or…
Correct answer: Living cells- A. Single-stranded RNA
- B. Double-stranded DNA
- C. Single-stranded DNA
- D. Double-stranded RNA
Explanation: Option A is correct.Influenza is an RNA enveloped virus. It contains a single standard RNA.Viruses are classified on different bases, such…
Correct answer: Single-stranded RNA- A. Smallpox virus
- B. Mumps and measles viruses.
- C. Influenza virus
- D. Polio virus
Explanation: Option A is correct. Mumps, measles, influenza, and polio viruses all contain RNA as their genetic material.
Correct answer: Smallpox virus- A. DNA
- B. RNA
- C. Capsid
- D. Envelope
Explanation: The capsid, or the protein coat, is present in all viruses. While not all viruses contain only DNA, nor do all contain only RNA.
Correct answer: Capsid- A. Nucleic acid
- B. Capsid
- C. Envelope
- D. None of these
Explanation: Viruses are acellular infectious agents that consist mainly of nucleic acid and a protein coat, and sometimes an outer envelope.
Correct answer: Envelope- A. Lipid
- B. RNA
- C. Protein
- D. DNA
Explanation: Capsomeres are protein in nature that makes up the capsid. While DNA and RNA are types of viral genomes.
Correct answer: Protein- A. DNA polymerase
- B. Reverse transcriptase
- C. RNA polymerase
- D. Ligase
Explanation: Among the options provided, "reverse transcriptase" is the enzyme naturally found in HIV.1.
Correct answer: Reverse transcriptase- A. DNA
- B. RNA
- C. A and B
- D. Protein
Explanation: It is composed of either RNA or DNA. Most animal viruses have a DNA genome, while most plant viruses have an RNA genome.
Correct answer: A and B- A. Virulent
- B. Temperate
- C. Lysogenic
- D. Latent
Explanation: Virulent phages immediately destroy their host cells through the lytic cycle.
Correct answer: Virulent- A. Animal cell
- B. Bacterial cell
- C. Fungal cell
- D. Animal and bacterial cell
Explanation: Bacteriophages are viruses that specifically infect and replicate within bacterial cells.
Correct answer: Bacterial cell