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. Cube of 8 cocci
- B. Square of 4 cocci
- C. Grape like cluster
- D. Triangular 6 cocci
Explanation: In cocci division, cocci bacteria divide in multiple planes to form distinct arrangements or clusters.
Correct answer: Cube of 8 cocci- A. 0.75-1.25 um
- B. 100-200 nm
- C. 0.1-600 um
- D. 500 um
Explanation: Spirochaets reach 500 micrometer in length.
Correct answer: 500 um2403. A huge microorganism, Acanthurus nigrofuscus is a_discovered in Intestin of brown surgeonfish.
- A. Bacterium
- B. Virus
- C. Parasite
- D. Protozoa
Explanation: Recently a huge bacterium has been discovered in the intestine of the brown surgeonish, Acanthurus nigrofuscus.
Correct answer: Bacterium- A. Diplococci
- B. Streptococcus
- C. Tetrad
- D. Sarcina
Explanation: Sarcinae is a genus of bacteria that are found in cuboidal arrangements of eight cocci.
Correct answer: Sarcina- A. Streptobacillus
- B. Streptococci
- C. Both A and B
- D. None of these
Explanation: Streptobacillus and Streptococcus both contain chain of many cell.
Correct answer: Both A and B- A. Bacillus anthracis
- B. Escherichia coli
- C. Spirillum minus
- D. Staphylococcus aureus
Explanation: Staphylococcus aureus possess spherical shape.
Correct answer: Staphylococcus aureus- A. Epulopiscium
- B. Pseudomonas aeruginosa
- C. Escherichia coli
- D. Streptococcus pneumoniae
Explanation: Epulopiscium fishelsoni is a bacterium that can be quite large, reaching up to 0.5 millimeters in length.
Correct answer: Epulopiscium- A. 100
- B. 150
- C. 200
- D. 250
Explanation: Studies show that approximately 200 pathogenic bacteria are responsible for causing diseases in humans.
Correct answer: 200- A. Phosphate Deficiency
- B. Vitamin D Deficiency
- C. Calcium Deficiency
- D. Enamel Deficiency
Explanation: Calcium is one of the essential vitamins for your dental health. It helps teeth and bones remain strong and healthy, and it prevents jaw…
Correct answer: Calcium Deficiency- A. UV rays
- B. IR rays
- C. Gamma rays
- D. X-rays
Explanation: Gamma ray is correct because due to the high penetrating power, short wavelength and high energy , gamma rays are ideal for the…
Correct answer: Gamma rays- A. Tetracycline
- B. Streptomycin
- C. Levofloxacin
- D. Erythromycin
Explanation: The prolonged adminstartion of streptomycin causes hearing loss or deafness in humans especially in the high frequency range.
Correct answer: Streptomycin- A. Nitrogen cycle
- B. Carbon cycle
- C. Urea cycle
- D. Water cycle
Explanation: Bacteria play many important roles in nitrogen cycle, while in carbon and urea cycle bacteria only have a single role.
Correct answer: Nitrogen cycle- A. Dry heat
- B. Moist heat
- C. Gamma rays
- D. All of these
Explanation: This is correct as sterilization uses many techniques which involve the use of gamma rays in some , moist heat in others and dry heat in…
Correct answer: All of these- A. Physical agents
- B. Biological agents
- C. Chemical agents
- D. All of these
Explanation: Pesticides and insecticides are the chemicals which kill the unwanted pests and insects for the welfare of humans.
Correct answer: Chemical agents- A. CO2 cycle
- B. Nitrogen cycle
- C. Phosphorus cycle
- D. All of above
Explanation: Bacteria play vita role(s) in all of the above mentioned cycles be it in the form of decomposition, nitrogen fixation , denitrification or…
Correct answer: All of above- A. Lag
- B. Log
- C. Stationary
- D. Decline
Explanation: Exponential Phase (Logarithmic Phase): In the exponential phase, the bacteria experience rapid and continuous growth at an exponential…
Correct answer: Log- A. TATA box
- B. Promoter
- C. Terminator
- D. Shine-Dalgarno sequence
Explanation: The correct answer is D) Shine-Dalgarno sequence. The Shine-Dalgarno sequence is a short RNA sequence found in the mRNA of prokaryotic…
Correct answer: Shine-Dalgarno sequence- A. A.V. Leeuwenhoek
- B. Pasture
- C. Janssen and Hans
- D. None of these
Explanation: It had long been suspected that small creatures exist which are too small to be seen with the naked eye.
Correct answer: A.V. Leeuwenhoek- A. Heterotrophic Bacteria
- B. Saprotrophic Bacteria
- C. Chemosynthetic Bacteria
- D. Parasitic Bacteria
Explanation: Chemosynthetic bacteria obtain their energy by converting inorganic substances into organic compounds.
Correct answer: Chemosynthetic Bacteria- A. Within nucleolus
- B. Prior to fission
- C. Just before transcription
- D. During SDuring S phase:
Explanation: DNA replication in bacteria occurs just before fission. Here's an explanation for each of the options you mentioned:1.
Correct answer: Prior to fission