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. Retrovirus
- B. Flavivirus
- C. Novavirus
- D. Tetanus
Explanation: HIV belongs to a special class of virus known as retrovirus. Retroviruses are a type of virus that uses RNA as its genetic material.
Correct answer: Retrovirus- A. Capsomere
- B. Genome
- C. Virion
- D. Capsid
Explanation: The correct answer is c. Virion. A virion is the complete, mature, and infectious virus particle, consisting of the viral genome (DNA or…
Correct answer: Virion- A. Bacteriophage
- B. Herpes virus
- C. Hepatitis virus
- D. Tobacco mosaic virus
Explanation: Tobacco mosaic virus (TMV) is a rod-shaped virus that infects plants, particularly tobacco and other solanaceous species.
Correct answer: Tobacco mosaic virus- A. cDNA
- B. DNA
- C. RNA
- D. rRNA
Explanation: HIV is a retrovirus with a genome made of two single-stranded RNA molecules, about 9,700 nucleotides long.
Correct answer: RNA- A. Morphology
- B. Host specificity
- C. Cell membrane
- D. Envelope
Explanation: Viruses are not classified based on the presence or absence of a cell membrane because:- Viruses do not have a cell membrane like cellular…
Correct answer: Cell membrane- A. Capsid
- B. DNA sheath
- C. Phage
- D. Viroid
Explanation: The capsule is an additional covering that surrounds the cell wall of some bacteria, providing protection against phagocytosis (engulfment…
Correct answer: Capsid- A. Diarrhea virus
- B. Mild rash virus
- C. Rubella virus
- D. Smallpox virus
Explanation: Parvovirus B19, which can cause mild rashes and conditions like fifth disease in children, is a single-stranded DNA virus.
Correct answer: Mild rash virus- A. Carbohydrates
- B. Lipids
- C. Lipoprotein
- D. Proteins
Explanation: Correct. Capsomeres are protein subunits that assemble to form the viral capsid, which provides structural support and protection for the…
Correct answer: Proteins- A. DNA virus
- B. DNA enveloped virus
- C. Protein tumor virus
- D. Retrovirus
Explanation: HIV (Human Immunodeficiency Virus) is an RNA virus that uses reverse transcriptase to convert its RNA into DNA inside host cells.This…
Correct answer: Retrovirus- A. 1
- B. 2
- C. 3
- D. 4
Explanation: HIV progresses through three main stages: an early phase where the person carries the virus without clear symptoms, a middle phase marked…
Correct answer: 3- A. Dengue
- B. Genital Herpes
- C. Gonorrhea
- D. Syphilis
Explanation: Genital herpes is an STI that develops when someone becomes infected with the Herpes Simplex Virus, usually HSV-2 and sometimes HSV-1.
Correct answer: Genital Herpes- A. Different
- B. Difficult
- C. Deficiency
- D. Degenerate
Explanation: The abbreviation of AIDS is Acquired Immune Deficiency Syndrome, so D in AIDS stands for deficiency. Thus option C is the correct option.
Correct answer: Deficiency- A. Sweet
- B. Sour
- C. Poison
- D. Toxic
- E. Acidic
Explanation: In Latin, virus means poison/ slimy liquid. It is a substance which is capable of infecting others.
Correct answer: Poison- A. A virus that infects bacteria
- B. A bacterium that infects virus
- C. A virus which behaves as bacteria
- D. Combination of Bacterium & Virion
Explanation: A bacteriophage is a type of virus that specifically infects bacteria. It attaches to the surface of bacterial cells and injects its…
Correct answer: A virus that infects bacteria- A. 2
- B. 4
- C. 6
- D. 8
Explanation: Bacteriophages typically have tail fibers attached to the end plate. These tail fibers help the phage attach to specific receptors on the…
Correct answer: 6- A. Hepatitis A virus
- B. Herpes virus
- C. Influenza virus
- D. Human immunodeficiency virus
Explanation: Human immunodeficiency virus (HIV) is a retrovirus, and it contains integrase, protease, and reverse transcriptase enzymes.
Correct answer: Human immunodeficiency virus- A. They do not respire
- B. They do not excrete
- C. They do not have the ability to reproduce
- D. They can be crystallised
Explanation: Viruses are acellular, obligate, intracellular parasites. Viruses are not alive, because they do not complete all of the seven life…
Correct answer: They do not have the ability to reproduce- A. Tobacco mosaic virus (TMV)
- B. Human immunodeficiency virus (HIV)
- C. Flu virus
- D. Polio virus
Explanation: Wendell Stanley studied the tobacco mosaic virus, which attacks the leaves of tobacco plants.
Correct answer: Tobacco mosaic virus (TMV)- A. Glycoprotein
- B. Glycolipid
- C. Lipoprotein
- D. Sulpholipid
Explanation: Lipoproteins are particles made of protein and fats (lipids). Viral envelopes consist of a lipoprotein bilayer that closely surrounds a…
Correct answer: Lipoprotein- A. Pancreas
- B. Liver
- C. Spleen
- D. Gall bladder
Explanation: Hepatitis means inflammation of the liver. The liver is a vital organ that processes nutrients, filters the blood, and fights infections.
Correct answer: Liver