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.
Last updated
3,130 questions · page 35 of 157
- A. Serum hepatitis
- B. Infectious hepatitis
- C. Bacterial hepatitis
- D. Delta hepatitis
Explanation: Hepatitis A is also called "infectious hepatitis."Hepatitis B is called "serum hepatitis," and it is a highly contagious virus.Hepatitis…
Correct answer: Delta hepatitis- A. Sexual contact
- B. Blood
- C. Breast feeding
- D. All of the above
Explanation: HIV is a sexually transmitted disease that spreads to the blood, especially in target cells of the immune system known as T-cells; thus…
Correct answer: All of the above- A. RNA
- B. Ribosomes
- C. Envelope
- D. Matrix
Explanation: Ribosomes are not a component of HIV. HIV is a retrovirus, which means that it has RNA as its genetic material.
Correct answer: Ribosomes- A. Sensitivity
- B. Complexity
- C. Variability
- D. Viability
Explanation: HIV is best described by genetic variability, not sensitivity, complexity, or viability.
Correct answer: Variability- A. Simian immunodeficiency virus
- B. Silurian immunodeficiency virus
- C. Siberian immunodeficiency virus
- D. Both A and C
Explanation: SIV stands for Simian Immunodeficiency Virus, which is a retrovirus that infects non-human primates such as monkeys and chimpanzees.
Correct answer: Simian immunodeficiency virus- A. Safe and protected lifestyle.
- B. Use of sterile injections and needles.
- C. Use of available vaccines.
- D. Safe blood transfusion methods.
Explanation: HIV (human immunodeficiency virus) is a virus that attacks the body's immune system.
Correct answer: Use of available vaccines.- A. Adenovirus
- B. Pox virus
- C. Influenza Virus
- D. Herpes virus
Explanation: Influenza is caused specifically by the influenza virus because it belongs to the Orthomyxoviridae family, which has unique properties -…
Correct answer: Influenza Virus- A. Gag protein
- B. Env protein
- C. Pol protein
- D. All of these
Explanation: The HIV Gag protein is responsible for packaging and locking the viral genome inside the capsid because its nucleocapsid (NC) domain…
Correct answer: Gag protein- A. 1967
- B. 1975
- C. 1980
- D. 1985
Explanation: The World Health Organisation (WHO) declared that smallpox was completely eradicated in 1980.
Correct answer: 1980- A. HSV-2
- B. Varicella-zoster virus
- C. Oncoviruses
- D. Picomavirus
Explanation: Oncoviruses (also called oncogenic viruses) are viruses that can cause cancers in humans and animals.
Correct answer: Oncoviruses- A. Retrovirus
- B. Adenovirus
- C. Poliovirus
- D. All of the above
Explanation: Retroviruses are a type of virus that can potentially convert normal cells into cancer cells.
Correct answer: Retrovirus- A. Kidney damage
- B. Liver damage
- C. Heart damage
- D. Lung damage
Explanation: People with chronic hepatitis are at risk of developing serious complications due to long-term liver inflammation and damage.
Correct answer: Liver damage- A. Bacteria facilitator
- B. Bacteria eater
- C. Animal viruses
- D. Plant viruses
Explanation: Bacteriophages are viruses that infect and replicate within bacteria, not facilitators.
Correct answer: Bacteria eater- A. Lysogenic cycle
- B. Lytic cycle
- C. Both
- D. None of the above
Explanation: The bacteriophage incorporates into the host genome in the lysogenic cycle.
Correct answer: Lysogenic cycle- A. Replication
- B. Penetration
- C. Attachment
- D. Injection
Explanation: The bacteriophage first attaches itself to the host cell. It then penetrates and injects itself into the nucleus of the host cell.
Correct answer: Attachment- A. Tail fibers
- B. Bacterial cytoplasm
- C. Base plate
- D. Head
Explanation: The double-stranded DNA of the bacteriophage is found in the head (capsid).
Correct answer: Head- A. Self replication in host cell
- B. Duplication
- C. Self duplication
- D. Multiplication in host cell
Explanation: The most accurate answer is self-replication in a host cell, since bacteriophages can reproduce only by infecting bacteria and directing…
Correct answer: Self replication in host cell- A. Lysogenic cycle
- B. Lytic cycle
- C. Both A and B
- D. None
Explanation: All infections of bacterial cells by phages do not result in lysis. In some cases viral DNA, instead of taking over the control of the…
Correct answer: Lysogenic cycle- A. HIV
- B. HCV
- C. Bacteriophage
- D. COVID-19
Explanation: Bacteriophages, like other viruses, usually occur in two structural forms: cuboidal (icosahedral) and helical.
Correct answer: Bacteriophage- A. ssDNA phage
- B. ssRNA phage
- C. dsDNA phage
- D. dsRNA phage
Explanation: T2 phage is more properly called Enterobacteria phage T2. It is a virulent bacteriophage that infects Escherichia coli bacteria.
Correct answer: dsDNA phage