This bacterium secretes an exotoxin that binds to nerve cells and causes muscle paralysis. O a. Clostridium botulinum b. Cholera c. Shigella d. Escherichia coli e. Penicillium

Q: When hydrogen peroxide is placed on a colony of an unknown bacterium, bubbles form. Based on this…

A: Correct option is, (d) Is catalase-positive.

Q: In the human body, Escherichia coli (a normally harmless bacterium) can be found in the: a. mouth b.…

A: Escherichia coli is a gram-negative bacteria. The organisms that are found on or inside the body of…

Q: The pathogenic prokaryotes that cause cholera are Select one: O A. bacteria that release an exotoxin…

A: Prokaryotes are the unicellular microbes. They don't have well defined nucleus.

Q: Doctors prescribe synergistic drug combinations to treatbacterial infections. The purpose of such…

A: Synergistic drug combinations comprise multiple active pharmaceutical ingredients and are widely…

Q: which gram negative bacteria might be according to the data? (a) Acinetobacter baumannii (b)…

A: Mannitol Salt Agar (MSA) is used as a selective and differential medium for the isolation and…

Q: If an acid-fast bacterium is detected in a clinical sample, thenthe organism could bea) Cryptococcus…

A: Answer- Those bacteria that resist the decolorization with acid alcohol because of the nature of…

Q: Chloroquine and primaquine are the agents most widelyused to treat:(a) Malaria (d) Legionnaires’…

A: Malaria can be defined as the disease which is caused due to parasite. The parasite is transmitted…

Q: The Golden Age of Microbiology was the time whena) microorganisms were first used to make bread.b)…

A: Microbiology can be defined as the study of microscopic organisms, such as bacteria, viruses,…

Q: The extensive use of antibiotics as well as gene transfer hasled to more virulent,…

A: Chemical agents that are used to treat diseases are called chemotherapeutic agents. Those agents…

Q: A bacterial arrangement in packets of eight cells is described as a __. a. micrococcus b.…

A: Bacteria are the prokaryotic organisms that lack the membrane-bound nucleus.

Q: Which group of organisms most commonly spoils breads, fruits, and dried foods?a) Acetobacter…

A: Microorganism: These are too small organism which is impossible to see by naked eyes. They exist in…

Q: Which of the following bacteria possesses a spherical shape? a) E. coli b) Bacillus anthracis c)…

A: Bacteria are microscopic organisms which belong to prokaryote because these are unicellular…

Q: Endotoxins are A) O Associated with lipid A of the LPS layer. B) O Secreted from the cell. C) O Part…

A: Endotoxins are substances, especially toxins, which are resistant to heat and are found in a wide…

Q: Medications used to treat protozoal infections are commonly referred to as _______________. A)…

A: Introduction Diseases caused by protozoan infections impact many different types of creatures,…

Q: How do Gram-negative bacteria differ from Gram-positivebacteria?a. They are not pathogenic.b. Their…

A: Introduction: Bacteria are single-celled living beings. Bacteria are discovered wherever on Earth…

Q: Plague has been successfully controlled by the use of streptomycin and tetracycline Why was this…

A: Plague is an infectious disease which is caused by Yersinia pestis. It is transmitted from rodents…

Q: Which bacterium does not have gelatinase enzymes O A. Staphylococcus aureus B. Bacillus subtilis O…

A: Gelatin hydrolysis test is used to identify the bacteria which can digest or degrade the gelatin by…

Q: If you read that coliforms had been found in a lake, the report could have been referring to which…

A: Coliforms cover a broad group of microorganisms that are present in the environment. They are…

Q: CFCsa. produce chlorine gas. c. are carcinogens.b. cause global warming. d. bind to chromosomes.

A: Ans: CFCs: The chemical which is nonflammable, nontoxic and contains carbon, chlorine and fluorine…

Q: Which is not a characteristic of Streptococcus pyogenes? a. group A streptococcus   c. sensitive to…

A: Ans: Streptococcus pyogenes: It is the gram-positive organism and is the causative agent of diseases…

Q: Which of the following is/are a pyogenic coccus/cocci?a. Streptococcus b. Staphylococcus c.…

A: The bacteria is the unicellular prokaryotic organism that maintains a definite shape since it…

Q: Bacterial LPS a. exists in Gram negative bacteria b. is the glycocalyx C. contains protein d. made…

A: Ans: Bacterial LPS or lipopolysaccharide are endotoxins and its description has been provided in…

Q: A bacterium that has had its cell wall removed is called:(a) A protoplast(b) A mycoplasma(c)…

A: Bacteria are single-celled prokaryotic organisms. These microbes possess cytoplasm, nucleus,  cell…

Q: A. Entamoeba hartmanni B. Entamoeba coli C. Entamoeba polecki

A: Note: As Per Guidelines, We Can Answer One Question or 3 subparts per question. Ask Again To get…

Q: 1. Which of the following bacterial species is not naturally competent? A) Bacillus subtilis B)…

A: Hi! Thank you for the questions. As you have posted multiple questions, I will be answering the…

Q: The pathogen Neisseria meningitidis has the nickname "the meningococcus". What is meningococcemia?…

A: Ans-(B) N. meningitidis in the bloodstream.

Q: Antibiotics are effective in killing: A. harmful bacteria, such as those that cause food poisoning…

A: Antibiotics are antimicrobial medications derived from other organisms (such as moulds, fungi, and…

Q: antibiotics is not bactericidal

A: Antibiotics are used as a safety measure against the attack of microorganisms. They disable the…

Q: Silver sulfadiazine is useda. in antisepsis of burns b. as a mouthwash c. to treat genital gonorrhea…

A: Silver compounds are used as disinfectants in medical devices and as ointments to prevent biofilm…

Q: the largest population of bacteria live within the _____________. a. large intestine b. stomach…

A: Humans have a complex digestive system consisting of the alimentary canal and various types of…

Q: Bacteria 1. a. Contains b. Cell wall contains C. Ex. Escherichia Coli bacteria (a carbohydrate) 2.

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Bacteria that can survive in extreme environments are called: a-Anaerobes b-Saprophytes c-Aerobes…

A: (a) Anaerobes : These are the bacteria or other microorganisms which can survive in absence of…

Q: Which of the following diseases is NOT caused by a bacterium? Group of answer choices A) Epidemic…

A: Bacterial disease refers to any of a variety of diseases caused by bacteria.

Q: an agent that is bacteriostatic

A: A bacteriostatic agent is a chemical/biological agent that inhibits or stops bacteria from…

Q: Robert Koch (a) proposed a set of guidelines to demonstrate that a specific pathogen causes specific…

A: Microorganisms are small living organisms some of which are pathogenic and cause diseases.

Q: Which microbe produces AB toxin? O A. Human immunodeficiency virus. O B. Mycobacterium tuberculosis.…

A: AB toxin is a toxin secreted by many pathogenic bacteria. It has two components namely ‘A’ and ‘B’.…

Q: Which of the following BEST describes an agent that is bacteriostatic? A) It suspends bacterial…

A: Correct answer is D

Q: Bacillus subtilis and Bacillus cereus most likely showed greater resistance to UV light than…

A: When some of the microbes are exposed to UV lights they will get killed. The more the time and the…

Q: The process of freezing food:  a. makes oxygen unavailable to pathogenic bacteria  b. makes liquid…

A: c. slows bacterial metabolism to a very low rate

Q: A bacterium that produces an extracellular enzyme may:  a. cause a boil      b. resist an…

A: Extracellular enzymes are an exoenzyme which is secreted by bacteria and functions outside that…

Q: was used by Joseph Lister to clean wounds and surgical instruments: A.Antibiotics b.Chlorine water…

A: We are answering first part. Kindly re post second part Two major contributions to the art of…

Q: Which group of bacteria contains the gram-positive, anaerobic bacterium that causes botulism? (a)…

A: Introduction :- Bacteria having thick cell walls are known as Gram-positive bacteria. These…

Q: Make a comparison and contrast between Pseudomonas and Escherichia coli. Explain.

A: Bacteria are organisms that are found almost everywhere on earth and are free-living cells that are…