MCQOPTIONS
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MCQOPTIONS
This section includes 126 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Litmus used as an indicator for acids and bases is extracted from |
| A. | Lichens |
| B. | Virus |
| C. | Plants |
| D. | Bacteria |
| Answer» B. Virus | |
| 52. |
The sole members of kingdom Monera are |
| A. | Mushrooms |
| B. | Virus |
| C. | Algae |
| D. | Bacteria |
| Answer» E. | |
| 53. |
Which of the following does not have the capacity to reproduce outside the host cell? |
| A. | Bacteria |
| B. | Fungi |
| C. | Algae |
| D. | Virus |
| Answer» E. | |
| 54. |
Pencillium from which an antibiotic is obtained is a type of |
| A. | Bacteria |
| B. | Virus |
| C. | Algae |
| D. | Fungus |
| Answer» E. | |
| 55. |
What type of microorganism is yeast which is used in many food preparations? |
| A. | Bacteria |
| B. | Fungi |
| C. | Algae |
| D. | Virus |
| Answer» C. Algae | |
| 56. |
Which of these is a saprotroph? |
| A. | Algae |
| B. | Pitcher plant |
| C. | Fungi |
| D. | Cuscuta |
| Answer» D. Cuscuta | |
| 57. |
Prokaryotes do not have |
| A. | Cytoplasm |
| B. | Ribosome |
| C. | Nuclear membrane |
| D. | Chromosomes |
| Answer» D. Chromosomes | |
| 58. |
Rhizobium bacteria are present in the _____ of leguminous plants. |
| A. | Roots |
| B. | Leaves |
| C. | Fruits |
| D. | Flowers |
| Answer» B. Leaves | |
| 59. |
In order to take precautionary steps to control dengue, we must take measures to stop the breeding of: |
| A. | Aedes mosquito |
| B. | Fleas |
| C. | Fire ants |
| D. | Anopheles mosquito |
| Answer» B. Fleas | |
| 60. |
Some plants have nitrogen-fixing bacteria in their root nodules. What are these bacteria called? |
| A. | Blue green algae |
| B. | Nitrosomonas |
| C. | Azotobacter |
| D. | Rhizobium |
| Answer» E. | |
| 61. |
Which of the following diseases is caused by a bacteria? |
| A. | Chicken pox |
| B. | Tuberculosis |
| C. | Dengue |
| D. | Polio |
| Answer» C. Dengue | |
| 62. |
Alcohol is produced with the help of |
| A. | sodium chloride |
| B. | yeast |
| C. | nitrogen |
| D. | carbon dioxide |
| Answer» C. nitrogen | |
| 63. |
Which of the following drug is an antipyretic? |
| A. | Insulin |
| B. | Alcohol |
| C. | Streptomycin |
| D. | Paracetamol |
| Answer» E. | |
| 64. |
Which of the following is a characteristic unique to the ciliates? |
| A. | Use of cilia as a sensory function |
| B. | Presence of both a macronucleus and several micronuclei |
| C. | Both (a) and (b) |
| D. | Possess a light-detecting eye spot |
| Answer» D. Possess a light-detecting eye spot | |
| 65. |
The binomial name of a microbe is composed of |
| A. | its kingdom and genus names |
| B. | its genus name and a species modifier |
| C. | its family and class names |
| D. | its genus and species names |
| Answer» C. its family and class names | |
| 66. |
Which of the following structure is present in prokaryotic cells? |
| A. | Mitochondria |
| B. | Chloroplasts |
| C. | Golgi structure |
| D. | Mesosome |
| Answer» E. | |
| 67. |
In the three domain system of classification, the traditional bacteria are placed in the |
| A. | eukarya |
| B. | archaea |
| C. | eubacteria |
| D. | none of these |
| Answer» D. none of these | |
| 68. |
One of the reasons for the evolutionary success of the kingdom Monera is that its members are nutritionally diverse. Which of the following(s) is/are the way(s) of obtaining energy? |
| A. | Photoautotrophy |
| B. | Photoheterotrophy |
| C. | Chemoheterotrophy |
| D. | All of the above |
| Answer» E. | |
| 69. |
Carl Woese and his colleague are best known for establishing |
| A. | the five kingdom system |
| B. | the three domain system |
| C. | the prokaryote-eukaryote system |
| D. | the plant-animal system |
| Answer» C. the prokaryote-eukaryote system | |
| 70. |
Which of the following is the most primitive? |
| A. | Virus |
| B. | Eukaryote |
| C. | Archaeon |
| D. | Mitochondria |
| Answer» D. Mitochondria | |
| 71. |
All the following are basic properties of cells except |
| A. | cells have nuclei and mitochondria |
| B. | cells have a genetic programme and the means to use it |
| C. | cells are capable of producing more of themselves |
| D. | cells are able to respond to stimuli |
| Answer» B. cells have a genetic programme and the means to use it | |
| 72. |
The individual best remembered for bringing microbes to the world is |
| A. | Robert Hooke |
| B. | Antony Van Leeuenhoek |
| C. | Robert Koch |
| D. | Masaki Ogata |
| Answer» C. Robert Koch | |
| 73. |
Which of the following microorganisms is classified as a member of archaebacteria? |
| A. | Gyanobacteria |
| B. | Methanobacteria |
| C. | Trichomonads |
| D. | Mycoplasma |
| Answer» C. Trichomonads | |
| 74. |
The first organism in most natural food chains is |
| A. | a herbivore |
| B. | a decomposer |
| C. | photosynthetic |
| D. | carnivorous |
| Answer» B. a decomposer | |
| 75. |
The third kingdom, protista, as suggested by E.H. Haeckel includes |
| A. | bacteria |
| B. | algae |
| C. | fungi |
| D. | all of these |
| Answer» E. | |
| 76. |
Prokaryotic microorganism include |
| A. | protozoa |
| B. | fungi |
| C. | bacteria |
| D. | all of these |
| Answer» D. all of these | |
| 77. |
The three domain version of life on earth is based on the |
| A. | nucleic acid sequence data |
| B. | morphological traits |
| C. | metabolic traits |
| D. | characteristics of the cell wall |
| Answer» B. morphological traits | |
| 78. |
The foundation for the germ theory of disease was set down by |
| A. | Robert Koch |
| B. | Ronald Ross |
| C. | Louis Pasteur |
| D. | Walter Reed |
| Answer» D. Walter Reed | |
| 79. |
The idea of selective toxicity was first proposed by |
| A. | Antony van Leeuwenhoek |
| B. | Paul Ehrlich |
| C. | Louis Pasteur |
| D. | Alexander Fleming |
| Answer» C. Louis Pasteur | |
| 80. |
Archeal cells usually do not contain peptidoglycan, rather contain pseudo-peptidoglycan which is mainly composed of |
| A. | N-acetylmuramic acid and L-amino acids |
| B. | N-acetylmuramic acid and D-amino acids |
| C. | N-acetyltalosaminuronic acid and D-amino acids |
| D. | N-acetyltalosaminuronic acid and L-amino acids |
| Answer» E. | |
| 81. |
The five-kingdom system of classification was set up by |
| A. | Louis Pasteur |
| B. | Robert Whittaker |
| C. | Robert Koch |
| D. | Masaki Ogata |
| Answer» C. Robert Koch | |
| 82. |
Primary differences between cilia and flagella are |
| A. | arrangement of microtubules |
| B. | length and location of basal bodies |
| C. | how the microtubules are fused to each other |
| D. | number, length and direction of force |
| Answer» E. | |
| 83. |
Micro organisms are found in which of the following kingdom of five kingdom concept (Whittaker's classification)? |
| A. | Monera |
| B. | Protista |
| C. | Fungi |
| D. | All of these |
| Answer» E. | |
| 84. |
Which of the following is/are included in Kingdom Prokaryotae? |
| A. | Bacteria |
| B. | Protozoa |
| C. | Fungi |
| D. | All of these |
| Answer» B. Protozoa | |
| 85. |
Which of the following may account for the small size of the cells? |
| A. | The rate of diffusion |
| B. | The surface area/volume ratio |
| C. | The number of mRNAs that can be produced by the nucleus |
| D. | All of the above |
| Answer» E. | |
| 86. |
The membranes of which domains are chemically the most similar? |
| A. | Archaea and Bacteria |
| B. | Bacteria and Eukarya |
| C. | Eukarya and Archaea |
| D. | membranes of all three domains are chemically identical |
| Answer» C. Eukarya and Archaea | |
| 87. |
All membranes of free-living organisms have phospholipid bilayers, but exception is |
| A. | bacteria |
| B. | fungi |
| C. | archaea |
| D. | protozoa |
| Answer» D. protozoa | |
| 88. |
All of the following are features of prokaryotes except |
| A. | nitrogen fixation |
| B. | photosynthesis |
| C. | sexual reproduction |
| D. | locomotion |
| Answer» D. locomotion | |
| 89. |
Which of the following structure is absent in eukaryotic cells? |
| A. | Mitochondria |
| B. | Chloroplasts |
| C. | Golgi structure |
| D. | Mesosome |
| Answer» E. | |
| 90. |
Which one is not studied in microbiology? |
| A. | Bacteria |
| B. | Animal behaviour |
| C. | Fungi |
| D. | Algae |
| Answer» C. Fungi | |
| 91. |
A newly discovered microscopic structure is hypothesized to be a living organism. Which of the following lines of evidence would support the contention that this organism may be alive? |
| A. | It contains DNA |
| B. | It is made of a single cell |
| C. | It utilizes energy |
| D. | All of these |
| Answer» D. All of these | |
| 92. |
Mycoplasmas, rickettsiae, and chlamydiae are |
| A. | types of fungi |
| B. | small bacteria |
| C. | species of protozoa |
| D. | forms of viruses |
| Answer» C. species of protozoa | |
| 93. |
Mycoplasmas are different from the other prokaryotes by |
| A. | presence of chitin in cell walls |
| B. | presence of murrain in cell walls |
| C. | presence of proteins in cell walls |
| D. | absence of cell wall itself |
| Answer» E. | |
| 94. |
Evolutionary relationships between groups of organisms are determined using which of the following type of information? |
| A. | Comparisons of nucleotide sequences |
| B. | Comparisons of biochemical pathways |
| C. | Comparisons of structural features |
| D. | All of the above |
| Answer» E. | |
| 95. |
Which of the following is not true for eukaryotic cells? |
| A. | Nucleus is bounded by nuclear membrane |
| B. | Chromosomes contain histones |
| C. | Chloroplasts and mitochondria contains 70S ribosomes |
| D. | Gas vacuoles are present |
| Answer» E. | |
| 96. |
Gram staining was introduced by |
| A. | Christian gram |
| B. | Alfred Gram |
| C. | Robertcook |
| D. | Louis Pasteur |
| Answer» B. Alfred Gram | |
| 97. |
Which of the following best represents the hierarchy of levels of biological classification? |
| A. | Phylum, kingdom, class, order, genus, species, family |
| B. | Kingdom, phylum, class, order, family, genus, species |
| C. | Kingdom, phylum, family, class, order, genus, species |
| D. | Class, order, kingdom, phylum, family, genus, species |
| Answer» C. Kingdom, phylum, family, class, order, genus, species | |
| 98. |
What are Blue-Green bacteria called? |
| A. | <i>Acquaobacteria</i> |
| B. | <i>Cyanobacteria</i> |
| C. | <i>Protozoa</i> |
| D. | None of the above |
| Answer» C. <i>Protozoa</i> | |
| 99. |
The endosymbiosis hypothesis provides an explanation for how |
| A. | eukaryotes developed from prokayotes |
| B. | prokaryotes developed from eukaryotes |
| C. | algae developed from protozoa |
| D. | protozoa developed from algae |
| Answer» B. prokaryotes developed from eukaryotes | |
| 100. |
Which cell type is considered to have the oldest ancestor? |
| A. | <i>Archaea</i> |
| B. | <i>Bacteria</i> |
| C. | <i> Eukarya</i> |
| D. | they all share the same ancestor |
| Answer» E. | |