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 17 of 157
- A. Severe pneumonia and a rare vascular cancer
- B. Rare pneumonia and severe vascular cancer
- C. Sudden weight loss and swollen lymph nodes
- D. Swollen lymph nodes and general loss of immune functions
Explanation: These symptoms were present in individuals with AIDS during its early recognition.
Correct answer: Rare pneumonia and severe vascular cancer- A. Severe combined immunodeficiency syndrome
- B. Acquired immunodeficiency syndrome
- C. Non-Hodgkin's lymphoma
- D. Bubble boy disease
Explanation: HIV is a virus that attacks the immune system. It can eventually lead to AIDS (acquired immunodeficiency syndrome), which is a condition…
Correct answer: Acquired immunodeficiency syndrome- A. Heterosexual males
- B. Young homosexual males
- C. Monkeys
- D. Young homosexual females
Explanation: Recent studies of HIV reveal that the virus infects and multiplies in monkeys but does not cause disease in them which means that HIV is…
Correct answer: Monkeys- A. Intimate sexual contact and breastfeeding
- B. Use of common syringes and surgical instruments
- C. Blood transfusion without screening
- D. Human immunodeficiency virus
Explanation: AIDS (Acquired Immunodeficiency Syndrome) is caused by the Human Immunodeficiency Virus (HIV).
Correct answer: Human immunodeficiency virus- A. Avoiding intravenous drugs
- B. Avoiding intracellular drugs
- C. Avoiding use of syringes
- D. Avoiding the direct contact with HIV
Explanation: This is the most important and accurate measure. HIV is primarily transmitted through direct contact with certain body fluids, including…
Correct answer: Avoiding the direct contact with HIV- A. 1,2,3,4
- B. 1,2,3,5
- C. 2,3,4,5
- D. 1,2,4,5
Explanation: Answer is "1,2,3,5"Explanation: Other than envelop which have been derived from the cell membrane of host cell, rest of the all parts of…
Correct answer: 1,2,3,5- A. 2
- B. 3
- C. 4
- D. 5
Explanation: Answer is "4"Explanation: Envelope have been labeled by 4. It is part of the plasma membrane of host cell and its genetic information is…
Correct answer: 4- A. 2
- B. 3
- C. 4
- D. 5
Explanation: Answer is "4"Take a look at the diagram.
Correct answer: 4- A. 2
- B. 3
- C. 4
- D. 5
Explanation: Answer is "2"Explanation: There are two molecules of reverse transcriptase i.e. one molecule is associated with each RNA.
Correct answer: 2- A. 2
- B. 3
- C. 4
- D. 5
Explanation: Answer is "2"Explanation: HIV have two identical strands of RNA, each having its own reverse transcriptase molecule.
Correct answer: 2- A. Replication
- B. Transcription
- C. Reverse transcription
- D. Translation
Explanation: Answer is "Reverse Transcription"Explanation: RNA is converted into DNA by a process called reverse transcription.
Correct answer: Reverse transcription- A. Head
- B. Tail
- C. Nucleocapsid
- D. Head and tail
Explanation: Answer is "Head and tail"Explanation: It is tadpole shaped with a head consisting up of nucleocapsid and a tail attached with head.
Correct answer: Head and tail- A. Hexagonal structure
- B. Pyramidal structure
- C. Prism shaped structure
- D. An oval structure
Explanation: Answer is "An oval structure"Explanation: The head of bacteriophage is an elongated, pyramidal, hexagonal, prism shaped structure, to…
Correct answer: An oval structure334. "Two triangular structures with common base" is the description of the structure of _ of T4 phage.
- A. Tail
- B. Head
- C. Collar
- D. Base plate
Explanation: The two triangular structures with a common base that you are referring to are called whiskers.
Correct answer: Collar- A. Single-Stranded DNA
- B. Double-Stranded DNA
- C. Single-Stranded RNA
- D. Double-stranded RNA
Explanation: Within the head of T4 phage, a double-stranded DNA molecule is present.Double-stranded DNA (dsDNA) is a molecule of DNA that consists of…
Correct answer: Double-Stranded DNA- A. Head, Tail
- B. Tail, Head
- C. Collar, Base plate
- D. Head, Base plate
Explanation: Answer is "Tail, Head"Explanation: Tail contains two types of proteins whereas head contains only one type of protein.
Correct answer: Tail, Head- A. Core or tube is made up of distinct protein
- B. Core or tube is enclosed in a sheath
- C. Core and sheath are made of the same type of protein
- D. Sheath is made of another type of protein
Explanation: Answer is "Core and sheath are made of same type of protein"Explanation: Core of tail is made up of a rigid and inflexible protein whereas…
Correct answer: Core and sheath are made of the same type of protein- A. 01
- B. 10
- C. 100
- D. 1000
Explanation: Answer is "1000"Explanation: The volume of the phage is about 1/1000th of the host.
Correct answer: 1000- A. Slime
- B. Cell wall
- C. Cell membrane
- D. Envelope
Explanation: A bacteriophage is a virus that infects bacteria. It attaches to the receptor site on the host cell's cell membrane.
Correct answer: Cell membrane- A. Minus mating strains
- B. Minus mating and plus mating strain
- C. Plus mating strain
- D. Same fungus
Explanation: Answer is "Minus Mating strain and plus mating strain"Explanation: In fungi due to homothallic body the terms of male and female cannot be…
Correct answer: Minus mating and plus mating strain