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Importance And Control Of Bacteria MDCAT MCQs with Answers

Importance And Control Of Bacteria MDCAT MCQs

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

Answer
b) Nitrogenase enzyme

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

Answer
c) Streptomyces

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

Answer
c) Saprophytes

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

Answer
c) Sterilization

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

Answer
b) Ultraviolet radiation

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

Answer
c) Fermentation of dairy products

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

Answer
b) Methanogens

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

Answer
a) Pasteurization

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

Answer
b) Intestine

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

Answer
b) Nitrogen fixation

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

Answer
c) Bacteria

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

Answer
b) Decomposition

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

Answer
a) Streptococcus thermophilus

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

Answer
b) High heat and pressure

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

Answer
a) Methanogens

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

Answer
b) Disinfection

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

Answer
a) Acetobacter

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

Answer
b) Sterilization

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

Answer
c) Hydrocarbonoclastic bacteria

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

Answer
c) Pasteurization

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

Answer
a) Bacillus

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

Answer
a) Overuse of antibiotics

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

Answer
b) Improve digestion and immune function

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

Answer
c) Ionizing radiation

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

Answer
b) Yogurt

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

Answer
b) Yogurt

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

Answer
a) Bacillus thuringiensis

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

Answer
b) Sterilization

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

Answer
c) Probiotics

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

Answer
a) Escherichia coli

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

Answer
c) Lactobacillus

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

Answer
b) Nitrogen fixation

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

Answer
b) Bioremediation

If you are interested to enhance your knowledge regarding PhysicsChemistryComputer, and Biology please click on the link of each category, you will be redirected to dedicated website for each category.

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