MCQOPTIONS
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MCQOPTIONS
This section includes 121 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Bacillus thuringiensis is useful as a bacterial |
| A. | source of antibiotics |
| B. | producer of vitamins |
| C. | herbicide |
| D. | pesticide |
| Answer» E. | |
| 102. |
The organisum used for production of streptomycin is |
| A. | <i>Streptomyces rimosus</i> |
| B. | <i>Streptomyces griseus</i> |
| C. | <i>Streptomyces aureofaciens</i> |
| D. | <i>Streptomyces erythreus</i> |
| Answer» C. <i>Streptomyces aureofaciens</i> | |
| 103. |
Which of the following is true about -ionone, non-ionic detergent used in carotene fermentation medium? |
| A. | It is a precursor of -carotene fermentation process |
| B. | It is regarded as "steering" factor associated with bringing about the presence and activity of the enzymes responsible for -carotene formation |
| C. | It is an inducer of carotene fermentation process |
| D. | None of the above |
| Answer» C. It is an inducer of carotene fermentation process | |
| 104. |
The micro-organism used for industrial production of lactic acid using corn dextrose as media is |
| A. | <i>Lactobacillus bulgaricus</i> |
| B. | <i>Lactobacillus delbrueckii</i> |
| C. | <i>Lactobacillus pentosus</i> |
| D. | <i>Streptococcus lactis</i> |
| Answer» C. <i>Lactobacillus pentosus</i> | |
| 105. |
In Corynebacterium glutamicum, tryptophan biosynthesis is regulated by the activity of |
| A. | DAHP synthetase |
| B. | Anthranilate synthase |
| C. | Both (a) and (b) |
| D. | Phosphoenol pyruvate |
| Answer» D. Phosphoenol pyruvate | |
| 106. |
Microbially produced streptokinase is used to |
| A. | remove spots from laundry products |
| B. | dissolve clots for patients with coronary blockages |
| C. | clarify fruit juice |
| D. | breakdown starch molecules into smaller sugars |
| Answer» C. clarify fruit juice | |
| 107. |
Anaerobic bacteria undergoes butyric isopropyl fermentation in carbohydrates to yield |
| A. | glycol |
| B. | butyric acid |
| C. | acetic acid |
| D. | all of these |
| Answer» E. | |
| 108. |
Who was the first scientist to observe the antibiotic and therapeutic properties of penicillin? |
| A. | Louis Pasteur |
| B. | Alexander Fleming |
| C. | S. C. Prescott |
| D. | E. P. Abraham |
| Answer» C. S. C. Prescott | |
| 109. |
Invertase has its application in confectionaries to prevent crystallization of sugar. It is obtained from |
| A. | <i>A. oryzae</i> |
| B. | <i>A. niger</i> |
| C. | <i>S. cerevisae</i> |
| D. | <i>B. subtilis</i> |
| Answer» D. <i>B. subtilis</i> | |
| 110. |
The method used for obtaining citric acid as fermentation product are commonly known as |
| A. | submerged aerated fermentation |
| B. | stationary tray fermentation |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 111. |
The immediate precursor for glumatic acid production by Corynebacterium glutamicum is |
| A. | lysine |
| B. | oxoacetate |
| C. | citrate |
| D. | 2-oxo-glutarate |
| Answer» E. | |
| 112. |
Which of the following is a cephalosporin? |
| A. | Cephalosporin N |
| B. | Synnematin |
| C. | Cephalosporin C |
| D. | All of these |
| Answer» E. | |
| 113. |
The penicillin F which was produced at first, required the mold |
| A. | <i>Penicillium chrysogenum</i> |
| B. | <i>Pencillium notatum</i> |
| C. | <i>Pencillium chrysogenum</i> |
| D. | Q-176 |
| E. | none of the above |
| Answer» C. <i>Pencillium chrysogenum</i> | |
| 114. |
Neomycin-B is obtained from |
| A. | <i>Streptomyces niveus</i> |
| B. | <i>Streptomyces fradiae</i> |
| C. | <i>Streptomyces spheroides </i> |
| D. | <i>Streptomyces griseus</i> |
| Answer» C. <i>Streptomyces spheroides </i> | |
| 115. |
Which of the following cephalosporin is more active than penicillin against various species of Salmonella? |
| A. | Cephalosporin N |
| B. | Cephalosporin C |
| C. | Synnematin |
| D. | Both (a) and (c) |
| Answer» E. | |
| 116. |
The other name of invertase enzyme is |
| A. | sucrase |
| B. | saccharase |
| C. | isomerase |
| D. | both (a) and (b) |
| Answer» E. | |
| 117. |
Commercial scale production of amino acids is typically carried out using |
| A. | regulatory mutants to cause overproduction of biochemical intermediates |
| B. | creation of an intentional increase in membrane permeability to increase release of the amino acids |
| C. | both (a) and (b) |
| D. | none of the above |
| Answer» D. none of the above | |
| 118. |
Which of the following microorganism produces only L(+) - lactic acid without further racemization ? |
| A. | <i>Leuconostoc mesenteroides</i> |
| B. | <i>Lactobacillus delbrueckii</i> |
| C. | <i>Rhizopus oryzae</i> |
| D. | <i>Lactobacillus bulgaricus</i> |
| Answer» D. <i>Lactobacillus bulgaricus</i> | |
| 119. |
Protease, which is used for flavouring of sake and haze removal in sake is produced by |
| A. | <i>A. oryzae</i> |
| B. | <i>A. flavus</i> |
| C. | <i>B. cereus</i> |
| D. | <i>A. niger</i> |
| Answer» B. <i>A. flavus</i> | |
| 120. |
Amyloglucosidase is used in glucose production. It is produced by |
| A. | <i>Rhizopus niveus</i> |
| B. | <i>Endomycopsis fibuliger</i> |
| C. | <i>Sclerotina libertina</i> |
| D. | both (a) and (b) |
| Answer» E. | |
| 121. |
An "International Unit" of penicillin activity established in 1944 is amount of penicillin equivalent to |
| A. | 0.6 micrograms of crystalline penicillin G of about 98% purity |
| B. | 0.6 micrograms of crystalline penicillin F of about 98% purity |
| C. | 0.8 micrograms of crystalline penicillin G of about 98% purity |
| D. | 0.8 micrograms of crystalline penicillin G of about 90% purity |
| Answer» B. 0.6 micrograms of crystalline penicillin F of about 98% purity | |