MCQOPTIONS
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MCQOPTIONS
This section includes 165 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Organisms with amoeboid cells that move within a network of mucous tracks using a typical gliding motion belong to which phylum of Protozoa? |
| A. | Labyinthomorpha |
| B. | Microspora |
| C. | Apicomplexa |
| D. | Myxozoa |
| Answer» B. Microspora | |
| 52. |
Verotoxin 1 of Escherichia coli is similar to |
| A. | cholera toxin |
| B. | shiga toxin |
| C. | heat-stable enterotoxin of E. coli |
| D. | heat-labile enterotoxin of E. coli |
| Answer» C. heat-stable enterotoxin of E. coli | |
| 53. |
Which of the following property(ies) is/are seen in the members of family Enterobacteriaceae? |
| A. | They are catalase-positive |
| B. | They are oxidase-negative |
| C. | They ferment glucose |
| D. | They reduce nitrates to nitrites |
| Answer» C. They ferment glucose | |
| 54. |
Laminarin is an energy storage material characteristic of |
| A. | chlorophyta |
| B. | chrysophyta |
| C. | phaeophyta |
| D. | pyrrophyta |
| Answer» D. pyrrophyta | |
| 55. |
Prodigiosin (red pigment) is produced by members of genus |
| A. | Hafnia |
| B. | Enterobacter |
| C. | Serratia |
| D. | Cirobacter |
| Answer» D. Cirobacter | |
| 56. |
Number of motility structures on flagellated cells is |
| A. | greater than ciliated cells |
| B. | lesser than ciliated cells |
| C. | equal to ciliated cells |
| D. | none of these |
| Answer» C. equal to ciliated cells | |
| 57. |
All algae possess |
| A. | nuclei |
| B. | chloroplasts |
| C. | Both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 58. |
Euglena contains cell wall made up of cellulose. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 59. |
Frustules are found in which of the following algae? |
| A. | Bacillariophycophyta |
| B. | Chlorophycophyta |
| C. | Euglenophycophyta |
| D. | Rhodophycophyta |
| Answer» B. Chlorophycophyta | |
| 60. |
Which of the following is a colonial green alga? |
| A. | Chlamydomonas |
| B. | Chlorella |
| C. | Volvox |
| D. | Spirogyra |
| Answer» D. Spirogyra | |
| 61. |
In Chlamydomonas the most common method of sexual reproduction is ________________ |
| A. | isogamy |
| B. | heterogamy |
| C. | oogamy |
| D. | spore formation |
| Answer» B. heterogamy | |
| 62. |
The xanthophyte walls are typically of _____________________ |
| A. | chitin |
| B. | cellulose |
| C. | cellulose and pectin |
| D. | starch |
| Answer» D. starch | |
| 63. |
Chrysamoeba exists in which of the following forms? |
| A. | nonmotile coccoid |
| B. | filamentous |
| C. | amoeboid |
| D. | motile amoeboid |
| Answer» E. | |
| 64. |
Certain flagellates of protozoa are present in the gut of some termites in a mutualistic relationship. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 65. |
The process in which protozoa attaches themselves to a host’s body is known as __________________ |
| A. | Endocommensalism |
| B. | Ectocommensalism |
| C. | Parasitic |
| D. | Mutualism |
| Answer» C. Parasitic | |
| 66. |
Algae are found in all of the following places except |
| A. | oceans |
| B. | soils |
| C. | lakes and streams |
| D. | associates with fungi |
| Answer» C. lakes and streams | |
| 67. |
Protozoa that eat other organisms are known as _______________ |
| A. | saprophytic |
| B. | holozoic |
| C. | parasitic |
| D. | mutualistic |
| Answer» C. parasitic | |
| 68. |
Chrysolaminarin is an energy storage material characteristic of |
| A. | chlorophyta |
| B. | chrysophyta |
| C. | phaeophyta |
| D. | rhodophyta |
| Answer» C. phaeophyta | |
| 69. |
The kelps are algae found in |
| A. | chlorophyta |
| B. | chrysophyta |
| C. | phaeophyta |
| D. | pyrrophyta |
| Answer» D. pyrrophyta | |
| 70. |
Among the following which layer is directly apposed to the cell surface? |
| A. | tests |
| B. | theca |
| C. | shells |
| D. | loricae |
| Answer» C. shells | |
| 71. |
How many haploid chromosomes are present in Spirotrichonympha polygyra? |
| A. | 60 |
| B. | 7 |
| C. | 2 |
| D. | 40 |
| Answer» D. 40 | |
| 72. |
Which of the following is an aerobic protozoa? |
| A. | Metopus |
| B. | Saprodinium |
| C. | Epalxis |
| D. | Vorticella |
| Answer» E. | |
| 73. |
Red snow of high altitudes is due to the presence of ________________ |
| A. | bacteria |
| B. | protozoa |
| C. | algae |
| D. | fungi |
| Answer» C. algae | |
| 74. |
The micronucleus in protozoa is concerned with reproductive activity. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 75. |
Which of the following is not a function of protozoa? |
| A. | acts as a link in food chain |
| B. | used in manufacture of food products |
| C. | decomposition process |
| D. | to study cell cycles |
| Answer» C. decomposition process | |
| 76. |
Which of the following describes the function of a secretory vacuole? |
| A. | Sites of food digestion |
| B. | Maintain osmotic balance by continuous water expulsion |
| C. | Contain specific enzymes that perform various functions |
| D. | Structures that accept male gametes during sexual reproduction |
| Answer» D. Structures that accept male gametes during sexual reproduction | |
| 77. |
The technique(s), used for the assay of heat-labile enterotoxin produced by Escherichia coli, is/are |
| A. | Steroid production in Yl mouse adrenal cell culture |
| B. | Morphological changes in Chinese hamster ovary |
| C. | Enzyme-linked immunosorbent assay |
| D. | All of these |
| Answer» E. | |
| 78. |
What is the shape of Paramecium? |
| A. | circular |
| B. | slipper-like |
| C. | spindle shaped |
| D. | irregular |
| Answer» C. spindle shaped | |
| 79. |
Kelps are which of the following type of algae? |
| A. | red algae |
| B. | yellow algae |
| C. | brown algae |
| D. | green algae |
| Answer» D. green algae | |
| 80. |
Which of the following does not take place in transverse fission? |
| A. | fission occurs at right angle to the long cell axis |
| B. | equatorial furrow appears |
| C. | cytoplasm protudes from the aperture |
| D. | constriction occurs forming two daughter cells |
| Answer» D. constriction occurs forming two daughter cells | |
| 81. |
When parasitic protozoa parasitize other protozoan it is known as ______________ |
| A. | Parasitism |
| B. | Mutualism |
| C. | Hyperparasitism |
| D. | Hypoparasitism |
| Answer» D. Hypoparasitism | |
| 82. |
Carpogonia is the female sex organ in which of the algae? |
| A. | Rhodophycophyta |
| B. | Xanthophycophyta |
| C. | Chrysophycophyta |
| D. | Chlorophycophyta |
| Answer» B. Xanthophycophyta | |
| 83. |
Protozoan mobility is due to the fibrils present. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 84. |
Agar, which is the solidifying agent in many bacterial culture media, is part of the cell wall of |
| A. | chlorophyta |
| B. | chrysophyta |
| C. | pyrrophyta |
| D. | rhodophyta |
| Answer» E. | |
| 85. |
Members of order Diplomonadida have how many flagella? |
| A. | 2 to 4 |
| B. | 6 to 8 |
| C. | 2 to 8 |
| D. | 1 to 2 |
| Answer» C. 2 to 8 | |
| 86. |
Transmission of pneumonic plague from man to man is through |
| A. | inoculation |
| B. | ingestion |
| C. | droplet infection |
| D. | all of these |
| Answer» D. all of these | |
| 87. |
Chlamydomonas and Volvox are similar because |
| A. | they both are motile |
| B. | they are members of the Chlorophyta |
| C. | Both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 88. |
Members of which phylum of Protozoa are being considered as biological control agents for certain insects? |
| A. | Microspora |
| B. | Sarcomastigophora |
| C. | Apicomplexa |
| D. | all of these |
| Answer» B. Sarcomastigophora | |
| 89. |
Sexual reproduction in the Protozoa occurs most commonly by |
| A. | conjugation |
| B. | gametangial contact |
| C. | binary fission |
| D. | binary fusion |
| Answer» B. gametangial contact | |
| 90. |
Which of the following comprises large cone-shaped protozoa? |
| A. | Didinium |
| B. | Vorticella |
| C. | Stentor |
| D. | Colpoda |
| Answer» D. Colpoda | |
| 91. |
Which of the following is the actual opening in ciliates through which food is ingested? |
| A. | cytosome |
| B. | oral groove |
| C. | peristome |
| D. | cytopharynx |
| Answer» B. oral groove | |
| 92. |
Zooxanthellae are algal symbiont that live within coral reef animals. These algae belong to |
| A. | chlorophyta |
| B. | chrysophyta |
| C. | pyrrophyta |
| D. | rhodophyta |
| Answer» D. rhodophyta | |
| 93. |
Protozoa have several types of vacuoles.The function of a contractile vacuole is to |
| A. | maintain osmotic balance by continuous water expulsion |
| B. | creates sites of food digestion |
| C. | contain specific enzymes that perform various functions |
| D. | have sites for photosynthesis |
| Answer» B. creates sites of food digestion | |
| 94. |
Species of Shigella which is predominant in India is |
| A. | S sonnei |
| B. | S dysenteriae |
| C. | S boydii |
| D. | S flexneri |
| Answer» E. | |
| 95. |
Vaucheria is a single-celled organism. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 96. |
Which of the following is least likely to get in or on a protozoan such as a diplomonad or trichomonad? |
| A. | Flagella |
| B. | More than one nucleus |
| C. | Genes to produce a cyst form |
| D. | Rigid polysaccharide cell wall |
| Answer» E. | |
| 97. |
Yersinia enterocolitica and Y. pestis can be differentiated on the basis of which of the following tests? |
| A. | Decarboxylation of ornithine |
| B. | Fermentation of sucrose and cellobiose |
| C. | Motility at 22°C |
| D. | All of these |
| Answer» E. | |
| 98. |
The numbers of nuclear divisions involved in a ciliate undergoing binary fission is |
| A. | greater than conjugation |
| B. | lesser than conjugation |
| C. | equal to conjugation |
| D. | none of these |
| Answer» C. equal to conjugation | |
| 99. |
Agar and carrageenan are polymers of _________________ |
| A. | glucose |
| B. | phosphoric acid |
| C. | starch |
| D. | galactose |
| Answer» E. | |
| 100. |
Which of the following algae continue to be a significant food in China? |
| A. | brown algae |
| B. | green algae |
| C. | red algae |
| D. | yellow algae |
| Answer» D. yellow algae | |