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Вопрос 1
Quantitative measurement of bacterial growth can be carried out by measuring
Варианты ответов
- Cell count
- Cell mass
- All of these
- Cell activity
Вопрос 2
An organism that is cultivatable only within living cells is described as
Варианты ответов
- Free-living
- An obligate intracellular parasite
- A hetertroph
- A saprophyte
Вопрос 3
A microorganism that grows either in the presence or absence of free oxygen is known as a/an
Варианты ответов
- Obligate aerobe
- Facultative anaerobe
- Parasite
- Anaerobe
Вопрос 4
Organic molecules that increase the rate of metabolic reactions with themselves changing are known as
Варианты ответов
- Enzymes
- Coenzymes
- Reactants
- Substrates
Вопрос 5
Which of the following is best used for long term storage of microbial samples when carried out properly
Варианты ответов
- Storage in a freezer at -10°C
- in a freezer at ultra-low temperatures (-70°C)
- Storage on a petri plate at room temperature
- Storage in a refrigerator on an agar slant
Вопрос 6
Autotrophs are organisms that
Варианты ответов
- Use organic compounds as nutrients
- Use inorganic carbon as a source of energy
- Use light as a source of energy
- Use any chemical as a source of energy
Вопрос 7
In which phase of the growth curve is the greatest population density reached
Варианты ответов
- Logarithmic
- Death
- Stationary
- Lag
Вопрос 8
Which is the process in which oxygen participates in an energy-yielding reaction
Варианты ответов
- Anabolism
- Catabolism
- Aerobic respiration
- Anaerobic respiration
Вопрос 9
Main function of an enzyme is to
Варианты ответов
- Increase the activation energy
- Decrease the activation energy
- Maintain constant activation energy
- None of these
Вопрос 10
The cell reproduction in bacteria may occur by
Варианты ответов
- Binary fission
- Budding
- Fragmentation
- All of these
Вопрос 11
What are the extrinsic factors for the microbial growth
Варианты ответов
- Humidity
- Storage temperature
- Composition of gas phase
- All of these
Вопрос 12
Many enzymes consists of a protein combined with low molecular weight organic molecule called as
Варианты ответов
- Apoenzyme
- Co-enzyme
- Holoenzyme
- Co-factors
Вопрос 13
The function of enzymes is to
Варианты ответов
- Catalyze a reaction faster than the spontaneous rate
- Cause a specific change in a substrate
- Lower the energy required for the reaction to occur
- All of the above
Вопрос 14
Hetetrophic bacteria obtain their energy from the oxidation of
Варианты ответов
- Organic molecules
- Inorganic molecules
- Phosphates
- All of the above
Вопрос 15
The straightforward method of binary fission explains how bacteria
Варианты ответов
- Grow in nutrient agar
- Evolve
- Reproduce
- Move
Вопрос 16
The term obligate anaerobe refers to an organism that
Варианты ответов
- Doesn't use oxygen but tolerates it
- Is killed by oxygen
- Uses oxygen when present or grows without oxygen when oxygen is absent
- Prefers to grow without oxygen
Вопрос 17
Digestive reactions where large molecules are broken down into smaller ones are referred as
Варианты ответов
- Anabolism
- Catabolism
- Metabolism
- Biosynthesis
Вопрос 18
Enzymes are
Варианты ответов
- Organic compounds produced by living organism
- Inorganic compounds
- Organic as well as inorganic compounds
- All of these
Вопрос 19
Lag phase is also known as
Варианты ответов
- Period of initial adjustment
- Generation time
- None of these
- Transitional period
Вопрос 20
The microorganisms that grow best in a low-oxygen environment is called a (n
Варианты ответов
- Aerobe
- Anaerobe
- Facultative
- Microaerophile
Вопрос 21
The period of most rapid growth of bacteria where the growth rate is constant is termed the
Варианты ответов
- Lag phase
- Maximum death phase
- Logarithmic phase
- Death phase
Вопрос 22
Examples of motile bacteria are found among
Варианты ответов
- Curved and spiral shaped bacteria and Bacilli
- Bacilli
- Cocci
- Curved and spiral shaped bacteria
Вопрос 23
Which of the following is the necessary step for cultivating the microorganisms
Варианты ответов
- Preparing a culture medium for the growth of microorganisms
- Inoculating the microorganisms in the prepared medium
- Sterilizing in order to eliminate all living microorganisms in vessel
- All of the above
Вопрос 24
Lipopolysaccharide is a major constituent of cell wall of:
Варианты ответов
- "Gram-positive bacteria"
- Gram-negative bacteria"
- Protozoa"
- Fungi"
Вопрос 25
"Peptidoglycan is major constituent of cell wall of:"
Варианты ответов
- "Gram-positive bacteria"
- "Gram-negative bacteria"
- "Fungi"
- Protozoa"
Вопрос 26
"All of the following are components of the gram positive cell wall, except-"
Варианты ответов
- "Teichoic acids"
- "Muramic acid"
- "Lipopolysaccharide"
- Glucosamine"
Вопрос 27
"Motility test is:"
Варианты ответов
- "Hanging drop"
- Streak method"
- "Crush drop"
- splashed drop
Вопрос 28
The average size of cells during the exponential phase of growth is"
Варианты ответов
- "Greater than the lag phase"
- "Lesser than the lag phase"
- Equal to the lag phase"
- "None of these"
Вопрос 29
"In the exponential phase, the cells and cell mass"
Варианты ответов
- "First increases then decreases"
- "Decreases"
- "Double at a constant rate"
- "Are constant"
Вопрос 30
What are the extrinsic factors for the microbial growth?"
Варианты ответов
- "Humidity"
- "Storage temperature"
- Composition of gas phase"
- All of these"
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