MDCAT MCQs

Importance And Control Of Bacteria MDCAT MCQs with Answers

Welcome to the Importance And Control Of Bacteria MDCAT MCQs with Answers. In this post, we have shared Importance And Control Of Bacteria Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Biology offers a chance to enhance your knowledge regarding Importance And Control Of Bacteria MCQs in this MDCAT Online Test.

Bacteria play an essential role in nitrogen fixation due to the presence of:
a) Ammonia
b) Nitrogenase enzyme
c) Carbon dioxide
d) Nitrate

Which bacteria are involved in the production of antibiotics?
a) Bacillus
b) Escherichia coli
c) Streptomyces
d) Staphylococcus

Bacteria that decompose dead organic matter are called:
a) Symbionts
b) Pathogens
c) Saprophytes
d) Parasites

The process of killing all forms of microbial life, including spores, is called:
a) Pasteurization
b) Disinfection
c) Sterilization
d) Antisepsis

Which of the following is a natural method to control bacteria?
a) Antibiotics
b) Ultraviolet radiation
c) High temperatures
d) Fermentation

The role of bacteria in the food industry includes:
a) Causing diseases
b) Spoiling food
c) Fermentation of dairy products
d) Digesting plastics

Which bacteria are commonly used in sewage treatment plants?
a) E. coli
b) Methanogens
c) Bacillus
d) Lactobacillus

Which of the following is a method of bacterial control using heat?
a) Pasteurization
b) Sterilization
c) Antibiotics
d) Disinfection

Bacteria help in the production of vitamin K in the:
a) Stomach
b) Intestine
c) Pancreas
d) Liver

Which bacterial process is essential for the nitrogen cycle?
a) Photosynthesis
b) Nitrogen fixation
c) Fermentation
d) Respiration

Antibiotics are primarily used to control:
a) Viruses
b) Fungi
c) Bacteria
d) Parasites

What is the role of bacteria in the carbon cycle?
a) Nitrogen fixation
b) Decomposition
c) Oxygen production
d) Antibiotic resistance

Which bacteria are involved in the fermentation of yogurt?
a) Streptococcus thermophilus
b) Bacillus anthracis
c) Clostridium tetani
d) Salmonella typhi

Autoclaving is a method used to control bacteria by using:
a) Ultraviolet rays
b) High heat and pressure
c) Antibiotics
d) Radiation

Which bacteria are responsible for producing methane in anaerobic conditions?
a) Methanogens
b) E. coli
c) Streptococcus
d) Bacillus

The use of chemical agents to destroy harmful bacteria on non-living objects is known as:
a) Sterilization
b) Disinfection
c) Pasteurization
d) Antibiotics

Which bacteria help in the production of vinegar through fermentation?
a) Acetobacter
b) Lactobacillus
c) Streptococcus
d) E. coli

Which term describes the complete elimination of all microorganisms?
a) Disinfection
b) Sterilization
c) Antisepsis
d) Pasteurization

Bacteria used in bioremediation to clean oil spills are called:
a) Pathogens
b) Probiotics
c) Hydrocarbonoclastic bacteria
d) Cyanobacteria

The process of using mild heat to kill harmful bacteria in liquids, such as milk, is known as:
a) Sterilization
b) Disinfection
c) Pasteurization
d) Antisepsis

Bacteria used to ferment soybeans in the production of soy sauce are:
a) Bacillus
b) Lactobacillus
c) Streptomyces
d) Acetobacter

Antibiotic resistance in bacteria is caused by:
a) Overuse of antibiotics
b) Lack of oxygen
c) Low temperature
d) Excessive UV radiation

The primary role of probiotics in the human body is to:
a) Cause diseases
b) Improve digestion and immune function
c) Break down toxins
d) Produce antibiotics

Which method uses radiation to sterilize medical instruments?
a) Pasteurization
b) Autoclaving
c) Ionizing radiation
d) Boiling

Bacteria are essential in the production of which of the following foods?
a) Bread
b) Yogurt
c) Rice
d) Fruits

Lactic acid bacteria are used in the production of:
a) Antibiotics
b) Yogurt
c) Vitamins
d) Hormones

Which bacteria can be used for biological control of pests?
a) Bacillus thuringiensis
b) Staphylococcus aureus
c) Escherichia coli
d) Clostridium botulinum

The method of controlling bacteria by using a high-pressure steam environment is called:
a) Disinfection
b) Sterilization
c) Pasteurization
d) Boiling

Bacteria that are beneficial to humans and help maintain gut health are known as:
a) Pathogens
b) Parasites
c) Probiotics
d) Antigens

Which of the following bacteria is used in the production of insulin through genetic engineering?
a) Escherichia coli
b) Streptococcus pyogenes
c) Mycobacterium tuberculosis
d) Bacillus subtilis

Bacteria used to produce cheese through fermentation are:
a) E. coli
b) Streptococcus
c) Lactobacillus
d) Bacillus

One of the most important functions of nitrogen-fixing bacteria is:
a) Carbon fixation
b) Nitrogen fixation
c) Protein synthesis
d) Oxygen production

The use of bacteria to degrade environmental pollutants is called:
a) Disinfection
b) Bioremediation
c) Sterilization
d) Fermentation

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