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. Pox virus
- B. Herpes virus
- C. Paramyxovirus
- D. Adenovirus
Explanation: Herpesviruses are DNA viruses that cause lifelong latent infections, commonly producing oral and genital herpes with painful vesicles…
Correct answer: Herpes virus- A. Serum
- B. Blood
- C. Faeces
- D. Saliva
Explanation: Hepatitis A and E viruses are enterically transmitted viruses, meaning their natural route of spread is through the gastrointestinal…
Correct answer: Faeces- A. Mutation
- B. Genome
- C. Replication
- D. Crystallization
Explanation: Viruses exhibit certain living characteristics such as mutation, replication, and the presence of a genome, but not crystallization.
Correct answer: Crystallization- A. Sheath
- B. Core
- C. Head
- D. Tail
Explanation: The attachment of a bacteriophage's tail to its host is a highly specific process that initiates infection.
Correct answer: Tail- A. Replication
- B. Transcription
- C. Translation
- D. All of these
Explanation: The lytic cycle is a viral reproduction process where a bacteriophage infects and destroys a host cell.
Correct answer: All of these546. It is antiviral:
- A. Penicillin
- B. Streptomycin
- C. Tetracycline
- D. Interferon
Explanation: Penicillin, tetracycline, and streptomycin are antibiotics that specifically target structures and processes unique to bacteria, which is…
Correct answer: Interferon- A. Hepatitis A
- B. Hepatitis B
- C. Hepatitis C
- D. Hepatitis D
Explanation: The second most common major form of hepatitis is hepatitis B. Hepatitis B is a viral infection that affects the liver and can lead to…
Correct answer: Hepatitis B- A. Without independent metabolism
- B. Multiplication outside living cells
- C. With independent metabolism
- D. It can be a culture in a cell-free medium
Explanation: Viruses lack the cellular machinery necessary for independent metabolism.
Correct answer: Without independent metabolism- A. Double-stranded DNA
- B. Single-stranded RNA
- C. Double stranded RNA
- D. Single stranded DNA
Explanation: While the original genetic material of HIV is single-stranded RNA, the virus undergoes a process called reverse transcription.
Correct answer: Single-stranded RNA- A. Cancer cells into normal cells
- B. Cancer cells into germ line cells
- C. Cancer cells into degenerated cells
- D. Normal cells into cancer cells
Explanation: Retroviruses can cause cancer by inserting their genetic material into the host cell's DNA.
Correct answer: Normal cells into cancer cells- A. Pasteur Institute in the USA
- B. National Institute of Health in France
- C. Pasteur Institute in the USA and the National Institute of Health in France
- D. Pasteur Institute in France and the National Institute of Health in the USA
Explanation: The Pasteur Institute is located in France, and the National Institute of Health (NIH) is located in the USA.
Correct answer: Pasteur Institute in France and the National Institute of Health in the USA- A. Intimate sexual contact and breastfeeding
- B. Use of common syringes and surgical instruments
- C. Blood transfusion without screening
- D. Human immunodeficiency virus
Explanation: HIV, the virus causing AIDS, spreads through specific means: intimate sexual contact, breastfeeding, shared needles or unsterilized…
Correct answer: Human immunodeficiency virus- A. Hepatitis C
- B. Hepatitis A
- C. HIV
- D. Hepatitis B
Explanation: It was claimed in 2001 that a vaccine against HIV had been developed, and after successful trials, it would be on the market for consumers.
Correct answer: HIV554. HIV is uncoated:
- A. Outside the cytoplasm
- B. At the surface of the host cell
- C. Inside the cytoplasm
- D. Inside the nucleus of the host cell
Explanation: After entering the host cell, HIV undergoes a process called uncoating, during which the viral capsid that surrounds its genetic material…
Correct answer: Inside the cytoplasm- A. Replication
- B. Transcription
- C. Reverse transcription
- D. Translation
Explanation: The answer is "Reverse Transcription."Explanation: RNA is converted into DNA by a process called reverse transcription.
Correct answer: Reverse transcription- A. Entry
- B. Uncoiling
- C. Reverse transcription
- D. Integration
Explanation: The answer is "Entry." Explanation: In the infection cycle of HIV, V occurs after the attachment of the virus to the host cell, followed…
Correct answer: Entry- A. HIV
- B. HBV
- C. HCV
- D. HAV
Explanation: The answer is "HIV."Explanation: Viruses are intracellular obligate parasites, and they require a specific receptor site for their…
Correct answer: HIV- A. Hexagonal structure
- B. Pyramidal structure
- C. Prism-shaped structure
- D. An oval structure
Explanation: The answer is "An oval structure."Explanation: The head of a bacteriophage is an elongated, pyramidal, hexagonal prism-shaped structure to…
Correct answer: An oval structure- A. Tail
- B. Head
- C. Collar
- D. Base plate
Explanation: "Two triangular structures with a common base" is the description of the structure of the base plate of the T4 phage.
Correct answer: Base plate- A. Single-Stranded DNA
- B. Double-Stranded DNA
- C. Single-Stranded RNA
- D. Double-stranded RNA
Explanation: The T4 bacteriophage contains a double-stranded DNA genome of about 169,000 base pairs.
Correct answer: Double-Stranded DNA