The sulfonamides interfere with bacterial metabolism by a. blocking cell wall synthesis. b. disrupting folic acid metabolism. c. reacting with bacterial cell membranes. d. inhibiting DNA replication.

The sulfonamides interfere with bacterial metabolism by
a. blocking cell wall synthesis.
b. disrupting folic acid metabolism.
c. reacting with bacterial cell membranes.
d. inhibiting DNA replication.
by

1 Answer

Answer :

b. disrupting folic acid metabolism.
by

Related questions

Trimethoprim and sulfamethoxazole are examples of synthesis. a. Sulfonamides; PABA b. Penicillins; Cell Wall c. Sulfonamides; Folic Acid d. Macrolides; Protein

Description : Trimethoprim and sulfamethoxazole are examples of synthesis. a. Sulfonamides; PABA b. Penicillins; Cell Wall c. Sulfonamides; Folic Acid d. Macrolides; Protein

Last Answer : c. Sulfonamides; Folic Acid

That sulfonamides act by inhibiting folate synthesis in bacteria is supported by the following findings except: A. Paraaminobenzoic acid antagonises the action of sulfonamides B. Methionine antagonises the action of sulfonamides C. Purines and thymidine present in pus antagonise the action of sulfonamides D. Bacteria that utilise folic acid taken up from the medium are insensitive to sulfonamides

Description : That sulfonamides act by inhibiting folate synthesis in bacteria is supported by the following findings except: A. Paraaminobenzoic acid antagonises the action of sulfonamides B. Methionine antagonises ... . Bacteria that utilise folic acid taken up from the medium are insensitive to sulfonamides

Last Answer : B. Methionine antagonises the action of sulfonamides

Penicillins interfere with bacterial cell wall synthesis by (a) Inhibiting synthesis of N-acetyl muramic acid pentapeptide (b) Inhibiting conjugation between N-acetyl muramic acid and N-acetyl glucosamine (c) Inhibiting transpeptidases and carboxy peptidases which cross link the peptidoglycan residues (d) Counterfeiting for D-alanine in the bacterial cell wall

Description : Penicillins interfere with bacterial cell wall synthesis by (a) Inhibiting synthesis of N-acetyl muramic acid pentapeptide (b) Inhibiting conjugation between N-acetyl muramic acid and N-acetyl ... link the peptidoglycan residues (d) Counterfeiting for D-alanine in the bacterial cell wall

Last Answer : Ans: C

Penicillins interfere with bacterial cell wall synthesis by: A. Inhibiting synthesis of N-acetyl muramic acid pentapeptide B. Inhibiting conjugation between N-acetyl muramic acid and N-acetyl glucosamine C. Inhibiting transpeptidases and carboxypeptidases which cross link the peptidoglycan residues D. Counterfeiting for D-alanine in the bacterial cell wall

Description : Penicillins interfere with bacterial cell wall synthesis by: A. Inhibiting synthesis of N-acetyl muramic acid pentapeptide B. Inhibiting conjugation between N-acetyl muramic acid and N-acetyl ... cross link the peptidoglycan residues D. Counterfeiting for D-alanine in the bacterial cell wall

Last Answer : C. Inhibiting transpeptidases and carboxypeptidases which cross link the peptidoglycan residues

Heavy metals, such as____work by _____‗‗ a. Mercury; Disrupting Membranes b. Copper; Producing Toxins c. Iodine; Denaturing Proteins d. Silver; Binding Protein Molecules Together

Description : Heavy metals, such as____work by _____‗‗ a. Mercury; Disrupting Membranes b. Copper; Producing Toxins c. Iodine; Denaturing Proteins d. Silver; Binding Protein Molecules Together

Last Answer : d. Silver; Binding Protein Molecules Together

Isoniazid has a very narrow drug spectrum as the active form of the drug specifically interferes with cell wall synthesis in _____ by inhibiting the production of mycolic acid in the cell wall. a. Staphylococcus b. Streptococcus c. Enterococcus d. Mycobacterium

Description : Isoniazid has a very narrow drug spectrum as the active form of the drug specifically interferes with cell wall synthesis in _____ by inhibiting the production of mycolic acid in the cell wall. a. Staphylococcus b. Streptococcus c. Enterococcus d. Mycobacterium

Last Answer : d. Mycobacterium

Chloramphenicol inhibits bacterial protein synthesis by: A. Binding to 30S ribosome and inhibiting attachment of aminoacyl tRNA B. Binding to 50S ribosome and preventing peptide bond formation C. Binding to 50S ribosome and blocking translocation of peptide chain D. Binding to both 30S and 50S ribosome and inducing misreading of mRNA code

Description : Chloramphenicol inhibits bacterial protein synthesis by: A. Binding to 30S ribosome and inhibiting attachment of aminoacyl tRNA B. Binding to 50S ribosome and preventing peptide bond formation C. Binding to ... chain D. Binding to both 30S and 50S ribosome and inducing misreading of mRNA code

Last Answer : B. Binding to 50S ribosome and preventing peptide bond formation

Vancomycin inhibits _____________ synthesis. a. protein b. DNA c. bacterial cell wall d. RNA

Description : Vancomycin inhibits _____________ synthesis. a. protein b. DNA c. bacterial cell wall d. RNA

Last Answer : c. bacterial cell wall

Tetracyclines interfere with a. Translation. b. Transcription. c. Dna Replication. d. Membrane Function.

Description : Tetracyclines interfere with a. Translation. b. Transcription. c. Dna Replication. d. Membrane Function.

Last Answer : a. Translation.

The mode of action of polymyxin is to A- inhibit protein synthesis B- inhibit DNA synthesis C- injury to the plasma membrane D- inhibit folic acid synthesis

Description : The mode of action of polymyxin is to A- inhibit protein synthesis B- inhibit DNA synthesis C- injury to the plasma membrane D- inhibit folic acid synthesis

Last Answer : injury to the plasma membrane

All the following are drugs or drug classes blocking cell wall synthesis except: a. Cephalosporins. b. Carbapenems. c. Monobactams. d. Tetracyclines.

Description : All the following are drugs or drug classes blocking cell wall synthesis except: a. Cephalosporins. b. Carbapenems. c. Monobactams. d. Tetracyclines.

Last Answer : a. Cephalosporins.

The most important mechanism by which tetracycline antibiotics exert antiimicrobial action is (a) They chelate Ca2+ ions and alter permeability of bacterial cell membrane (b) They bind to 30S ribosomes and inhibit bacterial protein synthesis (c) They bind to 50S ribosomes and interfere with translocation of the growing peptide chain in the bacteria (d) They interfere with DNA mediated RNA synthesis in bacteria

Description : The most important mechanism by which tetracycline antibiotics exert antiimicrobial action is (a) They chelate Ca2+ ions and alter permeability of bacterial cell membrane (b) They bind to 30S ribosomes ... peptide chain in the bacteria (d) They interfere with DNA mediated RNA synthesis in bacteria

Last Answer : Ans: B

The most important mechanism by which tetracycline antibiotics exert antimicrobial action is: A. They chelate Ca2+ ions and alter permeability of bacterial cell membrane B. They bind to 30S ribosomes and inhibit bacterial protein synthesis C. They bind to 50S ribosomes and interfere with translocation of the growing peptide chain in the bacteria D. They interfere with DNA mediated RNA synthesis in bacteria

Description : The most important mechanism by which tetracycline antibiotics exert antimicrobial action is: A. They chelate Ca2+ ions and alter permeability of bacterial cell membrane B. They bind to 30S ribosomes ... peptide chain in the bacteria D. They interfere with DNA mediated RNA synthesis in bacteria

Last Answer : B. They bind to 30S ribosomes and inhibit bacterial protein synthesis

During the first 10 minutes after injection of phage DNA, no phage can be recovered by disrupting the infected bacterium. This is termed as A- eclipse period B- rise period C- latent period D- burst size

Description : During the first 10 minutes after injection of phage DNA, no phage can be recovered by disrupting the infected bacterium. This is termed as A- eclipse period B- rise period C- latent period D- burst size

Last Answer : eclipse period

The Ames test is an effective procedure for a. Identifying disease-causing bacterial species. b. Detecting potential human carcinogens. c. Determining if DNA replication has occurred. d. Detecting antibiotic resistance.

Description : The Ames test is an effective procedure for a. Identifying disease-causing bacterial species. b. Detecting potential human carcinogens. c. Determining if DNA replication has occurred. d. Detecting antibiotic resistance.

Last Answer : b. Detecting potential human carcinogens.

Herbicides disrupting cell membranes a). Bipyridilliums b). diphenylethers c). Both d). Ureas

Description : Herbicides disrupting cell membranes a). Bipyridilliums b). diphenylethers c). Both d). Ureas

Last Answer : c). Both

Antibacterial agents can be classified with regard to their structure, mechanism of action, and activity pattern against various types of bacterial pathogens. Which of the following statement(s) is/are true concerning antimicrobial classes? a. Penicillins and cephalosporins share the compound structure of a b-lactam ring which binds to bacterial division plate proteins b. Tetracyclines and macrolides such as erythromycin inhibit bacterial ribosomal activity and therefore protein synthesis c. Aminoglycosides act in a similar fashion to tetracyclines and therefore are both bacteriostatic d. Sulfonamides and trimethoprim act synergistically to inhibit purine synthesis

Description : Antibacterial agents can be classified with regard to their structure, mechanism of action, and activity pattern against various types of bacterial pathogens. Which of the following ... are both bacteriostatic d. Sulfonamides and trimethoprim act synergistically to inhibit purine synthesis

Last Answer : Answer: a, b, d Penicillins, cephalosporins, and monobactams possess a b-lactam ring of some type and act to bind bacterial division plate proteins, thus inhibiting cell wall ... act in different mechanisms to inhibit protein synthesis, therefore two agents in combination act synergistically

When comparing bacterial and archaeal cell membranes, only bacterial cell membranes a. Have three layers of phospholipids. b. Have a phospholipid bilayer. c. Are fluid. d. Have ether linkages.

Description : When comparing bacterial and archaeal cell membranes, only bacterial cell membranes a. Have three layers of phospholipids. b. Have a phospholipid bilayer. c. Are fluid. d. Have ether linkages.

Last Answer : b. Have a phospholipid bilayer.

During DNA replication in prokaryotes, synthesis begins on the circular chromosome A.always at the same place B.at any stretch of DNA that is high in AT pairs C.randomly on the chromosome D.at the promoter

Description : During DNA replication in prokaryotes, synthesis begins on the circular chromosome A.always at the same place B.at any stretch of DNA that is high in AT pairs C.randomly on the chromosome D.at the promoter

Last Answer : A.always at the same place

Bactericidal action of aminoglycoside antibiotics is due to: A. Inhibition of bacterial protein synthesis B. Alteration of bacterial cell membrane permeability C. Damage to bacterial cell wall D. Inhibition of bacterial oxidative metabolism

Description : Bactericidal action of aminoglycoside antibiotics is due to: A. Inhibition of bacterial protein synthesis B. Alteration of bacterial cell membrane permeability C. Damage to bacterial cell wall D. Inhibition of bacterial oxidative metabolism

Last Answer : B. Alteration of bacterial cell membrane permeability

Antibiotics inhibiting nucleic acid synthesis include a. Rifampin and quinolones. b. Aminoglycosides and tetracyclines. c. Lincosamides and streptogramins.d. Macrolides and ami noglycosides..

Description : Antibiotics inhibiting nucleic acid synthesis include a. Rifampin and quinolones. b. Aminoglycosides and tetracyclines. c. Lincosamides and streptogramins. d. Macrolides and ami noglycosides.

Last Answer : a. Rifampin and quinolones.

By which of the following means antifungal chemotherapeutic agents may affect fungi? A- Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis B- Interfere with normal nucleic acid synthesisInterfere with ergosterol biosynthesis and thus alter the structure of the cytoplasmic C- membrane as well as the function of several membrane-bound enzymes like thoseinvolved in nutrient transport and chitin synthesis D- all of these

Description : By which of the following means antifungal chemotherapeutic agents may affect fungi? A- Interfere with nuclear division by preventing the aggregation of microtubules needed for mitosis B- ... membrane-bound enzymes like thoseinvolved in nutrient transport and chitin synthesis D- all of these

Last Answer : all of these

Where does protein synthesis take place in all cells? a. mitochondria b. cell membranes c. ribosomes d. Golgi apparatus

Description : Where does protein synthesis take place in all cells? a. mitochondria b. cell membranes c. ribosomes d. Golgi apparatus

Last Answer : c. ribosomes

New approaches to antibiotic therapy include a. Carbohydrate targets in the wall LPS. b. unregulating DNA replication. c. Discovering new and unique antibiotics. d. All of the above (A—C) are correct.

Description : New approaches to antibiotic therapy include a. Carbohydrate targets in the wall LPS. b. unregulating DNA replication. c. Discovering new and unique antibiotics. d. All of the above (A—C) are correct.

Last Answer : d. All of the above (A—C) are correct.

Antibiotics will not work against _____ diseases because they lack the structures and metabolic machinery with which antibiotics interfere. a. viral b. bacterial c. fungal d. protozoan

Description : Antibiotics will not work against _____ diseases because they lack the structures and metabolic machinery with which antibiotics interfere. a. viral b. bacterial c. fungal d. protozoan

Last Answer : a. viral

Sulpha drugs interfere with bacterial synthesis of (A) Lipoate (B) Vitamin E (C) Tetrahydrofolate (D) Ascorbic acid

Description : Sulpha drugs interfere with bacterial synthesis of (A) Lipoate (B) Vitamin E (C) Tetrahydrofolate (D) Ascorbic acid

Last Answer : Answer : C

The first step in infection of a host bacterial cells by a phage is A- adsorption B- absorption C- penetration D- replication

Description : The first step in infection of a host bacterial cells by a phage is A- adsorption B- absorption C- penetration D- replication

Last Answer : adsorption

Indicate the attribute that is common to both polymyxin B and bacitracin: A. Both are active against gram negative bacteria B. Both are too toxic for systemic use C. Both act by inhibiting bacterial cell wall synthesis D. Both a

Description : Indicate the attribute that is common to both polymyxin B and bacitracin: A. Both are active against gram negative bacteria B. Both are too toxic for systemic use C. Both act by inhibiting bacterial cell wall synthesis D. Both a

Last Answer : B. Both are too toxic for systemic use

The development of global regulatory systems in prokaryotes A- determines the exact location of the cell on the globe B- aids in DNA replication C- .determines the exact location of the replication site D- regulates many genes under varying environmental conditions

Description : The development of global regulatory systems in prokaryotes A- determines the exact location of the cell on the globe B- aids in DNA replication C- .determines the exact location of the replication site D- regulates many genes under varying environmental conditions

Last Answer : regulates many genes under varying environmental conditions

Which one of the following is NOT an event of sporulation? a. Symmetrical cell divisions b. Mother cell disintegration c. DNA replication d. Prespore engulfment by the mother cell

Description : Which one of the following is NOT an event of sporulation? a. Symmetrical cell divisions b. Mother cell disintegration c. DNA replication d. Prespore engulfment by the mother cell

Last Answer : a. Symmetrical cell divisions

What is true of Quinupristin-Dalfopristin: A. It is a synergistic combination of two similar antibiotics B. It acts by inhibiting bacterial protein synthesis C. It is active against most resistant coccal infections D. All of the above are correct

Description : What is true of Quinupristin-Dalfopristin: A. It is a synergistic combination of two similar antibiotics B. It acts by inhibiting bacterial protein synthesis C. It is active against most resistant coccal infections D. All of the above are correct

Last Answer : D. All of the above are correct

The following is true of vancomycin except: A. It is a bactericidal antibiotic active primarily against gram positive bacteria B. It acts by inhibiting bacterial protein synthesis C. It is an alternative to penicillin for enterococcal endocarditis D. It can cause deafness as a dose related toxicity

Description : The following is true of vancomycin except: A. It is a bactericidal antibiotic active primarily against gram positive bacteria B. It acts by inhibiting bacterial protein synthesis C. It is an alternative to penicillin for enterococcal endocarditis D. It can cause deafness as a dose related toxicity

Last Answer : B. It acts by inhibiting bacterial protein synthesis

Intracellular organization in bacterial and archaeal species is centered a. Compartmentation of metabolism. b. Growth and reproduction. c. Sensing and responding to environment. d. All the above (A—C) are correct.

Description : Intracellular organization in bacterial and archaeal species is centered a. Compartmentation of metabolism. b. Growth and reproduction. c. Sensing and responding to environment. d. All the above (A—C) are correct.

Last Answer : d. All the above (A—C) are correct.

The final step of gene expression is protein synthesis, which is also known as A- replication B- translation C- transcription D- none of these

Description : The final step of gene expression is protein synthesis, which is also known as A- replication B- translation C- transcription D- none of these

Last Answer : translation

The polyene antibiotics act by: A. Inhibiting fungal cytochrome P450 enzyme B. Binding to ergosterol and creating micropores in fungal cell membrane C. Inhibiting fungal DNA synthesis D. Disorienting microtubules in fungal cells

Description : The polyene antibiotics act by: A. Inhibiting fungal cytochrome P450 enzyme B. Binding to ergosterol and creating micropores in fungal cell membrane C. Inhibiting fungal DNA synthesis D. Disorienting microtubules in fungal cells

Last Answer : B. Binding to ergosterol and creating micropores in fungal cell membrane

Bacillus subtilis makes a good "bacterial factory" in genetic engineering because _____. a. it normally retains the products it makes b. it is not a human pathogen c. contains endotoxins in it's cell wall d. traditionally ferments sugars

Description : Bacillus subtilis makes a good "bacterial factory" in genetic engineering because _____. a. it normally retains the products it makes b. it is not a human pathogen c. contains endotoxins in it's cell wall d. traditionally ferments sugars

Last Answer : b. it is not a human pathogen

Which one of the following is NOT true of exotoxins? a. They are proteins. b. They are part of cell wall structure. c. They are released from live bacterial cells. d. They trigger antibody production.

Description : Which one of the following is NOT true of exotoxins? a. They are proteins. b. They are part of cell wall structure. c. They are released from live bacterial cells. d. They trigger antibody production.

Last Answer : d. They trigger antibody production.

$ DNA replication in a bacterial cell is bidirectional. ! A chromosomes with primary constriction is called "SAT" chromosomes.

Description : $ DNA replication in a bacterial cell is bidirectional. ! A chromosomes with primary constriction is called "SAT" chromosomes.

Last Answer : $ DNA replication in a bacterial cell is bidirectional. ! A chromosomes with primary constriction is called "SAT ... D. If both As and R are wrong.

Competence refers to a bacterial cell's ability to a. Take Up DNA Fragments From The Environment. b. Be Infected By A Transducing Phage. c. Produce A Protein Product From An Engineered Gene. d. Undergo Conjugation With An F+ Cell.

Description : Competence refers to a bacterial cell's ability to a. Take Up DNA Fragments From The Environment. b. Be Infected By A Transducing Phage. c. Produce A Protein Product From An Engineered Gene. d. Undergo Conjugation With An F+ Cell.

Last Answer : a. Take Up DNA Fragments From The Environment.

A bacterial cell that is transformed _____. a. Cannot Form A Conjugation Pilus. b. Has Undergone A Frameshift Mutation. c. Has Acquired Dna From The Environment. d. Will Probably Die Within 24 Hours.

Description : A bacterial cell that is transformed _____. a. Cannot Form A Conjugation Pilus. b. Has Undergone A Frameshift Mutation. c. Has Acquired Dna From The Environment. d. Will Probably Die Within 24 Hours.

Last Answer : c. Has Acquired Dna From The Environment.

What is term used for a bacterial cell that is able to take up naked DNA? A- Complementary B- Liable C- Competent D- Infected

Description : What is term used for a bacterial cell that is able to take up naked DNA? A- Complementary B- Liable C- Competent D- Infected

Last Answer : Competent

Most hormone receptors are localized on the cell membrane and transduce hormone binding into altered levels of intracellular messengers. A limited number of intracellular receptors do exist. Which of the following statement(s) is/are true concerning intracellular receptors? a. The messengers or hormones must by lipophilic b. These intracellular receptors generally regulate protein synthesis c. The intracellular receptors are located entirely in the nucleus of the cell d. A heat-shock protein serves as an inhibitor protein blocking the DNA-binding domain of the steroid receptor

Description : Most hormone receptors are localized on the cell membrane and transduce hormone binding into altered levels of intracellular messengers. A limited number of intracellular receptors do exist. Which of ... protein serves as an inhibitor protein blocking the DNA-binding domain of the steroid receptor

Last Answer : Answer: a, d Although most hormone and other messenger receptors are extracellular, intracellular receptors have been identified. The hormone messengers involved for these receptors are primarily ... DNA-binding domain of the receptor. Activation involves the dissociation of the inhibitor protein

In the semiconservative method of replication a. Both parent strands are degraded. b. One parent strand is conserved in each of the the new dna. c. Both parent strands reform with one another. d. Okazaki fragments form both of the new molecules of DNA.

Description : In the semiconservative method of replication a. Both parent strands are degraded. b. One parent strand is conserved in each of the the new dna. c. Both parent strands reform with one another. d. Okazaki fragments form both of the new molecules of DNA.

Last Answer : b. One parent strand is conserved in each of the the new dna.

Why is DNA replication considered semiconservative? a. none of the materials are wasted b. it is a very efficient process c. half of the new DNA molecule is half of the original molecule d. none of the above are correct

Description : Why is DNA replication considered semiconservative? a. none of the materials are wasted b. it is a very efficient process c. half of the new DNA molecule is half of the original molecule d. none of the above are correct

Last Answer : c. half of the new DNA molecule is half of the original molecule

Excision repair would correct DNA damage caused by a. Antibiotics. b. UV Light. c. A Chemical Mutagen. d. A Dna Replication Error.

Description : Excision repair would correct DNA damage caused by a. Antibiotics. b. UV Light. c. A Chemical Mutagen. d. A Dna Replication Error.

Last Answer : b. UV Light.

Spontaneous mutations could arise from a. DNA replication errors. b. Atmospheric Radiation. c. Addition Of Insertion Sequences. d. All the above (A—C) are correct.

Description : Spontaneous mutations could arise from a. DNA replication errors. b. Atmospheric Radiation. c. Addition Of Insertion Sequences. d. All the above (A—C) are correct.

Last Answer : d. All the above (A—C) are correct.

If an antibiotic binds to a 50S subunit, what cellular process will be inhibited? a. DNA replication b. Intron excision c. Translation d. Transcription

Description : If an antibiotic binds to a 50S subunit, what cellular process will be inhibited? a. DNA replication b. Intron excision c. Translation d. Transcription

Last Answer : c. Translation

At a chromosome replication fork, the lagging strand consists of__ That is joined by___. a. RNA sequences; DNA ligase b. Okazaki Fragments; RNA Polymerase c. RNA sequences; ribosomes d. Okazaki fragments; DNA ligase

Description : At a chromosome replication fork, the lagging strand consists of__ That is joined by___. a. RNA sequences; DNA ligase b. Okazaki Fragments; RNA Polymerase c. RNA sequences; ribosomes d. Okazaki fragments; DNA ligase

Last Answer : d. Okazaki fragments; DNA ligase

The enzyme adds complementary bases to the DNA template strand during replication. a. Ligase b. Helicase c. DNA polymerase III d. RNA polymerase

Description : The enzyme adds complementary bases to the DNA template strand during replication. a. Ligase b. Helicase c. DNA polymerase III d. RNA polymerase

Last Answer : d. RNA polymerase

The sulfa drugs work by _______ with PABA in making folic acid. a. Positive Feedback b. Negative Feedback c. Competitive Inhibition d. Allosteric Inhibition

Description : The sulfa drugs work by _______ with PABA in making folic acid. a. Positive Feedback b. Negative Feedback c. Competitive Inhibition d. Allosteric Inhibition

Last Answer : c. Competitive Inhibition