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Quiz 7
Mdcat-past-papers - BUMHS Quiz
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Board: BUMHS |
121. Respiration in Pseudomonas bacteria is :
Aerobic
Anaerobic
Facultative
Miroaerophilic
122. The directional movement toward or away from the stimulus is called:
Tropism
Orientation
Taxis
Non orientation
123. Bacteria that lives in hydrothermal vents is:
Eubacteria
Both can live
archaebacteria
both cannot live
124. Nucleoid is a structure not found in :
Campylobacter
Cyanobacteria
Spirochete
Globlet cells
125. Bacterial cell have ability to maintain its shape through:
Cell wall
Cell wall & slime
Capsule
Slime
126. Which structure of prokaryotic cell will play the role of mitochondrion?
Spores
Nucleoid
Cysts
Mesosomes
127. Membranous infoldings in bacteria that initiate DNA replication is called:
Mesosomes
Peroxisomes
Glyoxisomes
Nucleosomes
128. In which phase of bacterial growth they divide at exponential rate:
Lag phase
Log phase
Stationary phase
Decline phase
129. Function of pilus in bacteria is to:
Increase pathogenicity
Degrade host plasma membrane
Degrade host enzymes
Exchange genetic material
130. Which component is present only in the cell wall of Gram-positive bacteria but Not in Gram-negative bacteria?
Teichoic acid
Lipids
Peptidoglycan
Periplasmic space
131. Which of the following is NOT true about plasmids found in streptococci?
Carry fewer genes than the chromosome
Replicate autonomously from the chromosome
They are considered as genetic element
The bacterial chromosome depends on plasmids for replication
132. Which of the following has chlorophyll?
cyanobacteria
Nostoc
oscillatoria
All have chlorophyll
133. Bacteria which lie in large intestine of humans and produce vitamin K belongs to:
Cocci
Spirilli
Bacilli
None
134. Cyanobacteria are photosynthetic in nature and are related to eukaryotic organisms having:
PSI
PSII
Both PSI & PSII
Lack Both PSI & PSII
135. Cysts are not resistant to but spores are:
Light
Desiccation
pH
Heat
136. increases the pathogenecity of bacteria:
Capsule
Slime
Cell wall
Cell membrane
137. Most widespread problem of antibiotic misuse is:
Rapid cure
Increased resistance in pathogens
Disturbance of metabolism
None
138. All of the following are physical methods to control bacteria except:
Sterilization
Boiling
Radiation
Antiseptics
139. Select a method which causes the oxidation of constituent of a bacterial cell:
Steam
Dry heat
Filtration
Radiation
140. Probiotics in infants formula milk are the normal bacterial flora to humans. They keep the babies healthy by doing all the following actions except:
Produce important vitamins
Kill pathogenic bacteria
prevent colonization of pathogens
Enhance immunity
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