The re-isolation and purification of penicillin was carried out by a. Waksman. b. Florey and Chain. c. Domagk. d. Fleming.

The re-isolation and purification of penicillin was carried out by
a. Waksman.
b. Florey and Chain.
c. Domagk.
d. Fleming.
by

1 Answer

Answer :

b. Florey and Chain.
by

Related questions

The term antibiotic was coined by _________to refer to antimicrobial substances naturally derived from _______. a. Waksman; bacteria and fungi b. Domagk; other living organisms c. Fleming; fungi and bacteria d. Ehrlich; bacteria

Description : The term antibiotic was coined by _________to refer to antimicrobial substances naturally derived from _______. a. Waksman; bacteria and fungi b. Domagk; other living organisms c. Fleming; fungi and bacteria d. Ehrlich; bacteria

Last Answer : c. Fleming; fungi and bacteria

Who discovered the first antibiotic ? (1) W Fleming (2) C Waksman (3) Louis Pasteur (4) A Fleming

Description : Who discovered the first antibiotic ? (1) W Fleming (2) C Waksman (3) Louis Pasteur (4) A Fleming

Last Answer : A Fleming

Waksman got the Nobel Prize for the discovery of : (1) Streptomycin (2) Chloromycetin (3) Neomycin (4) Penicillin

Description : Waksman got the Nobel Prize for the discovery of : (1) Streptomycin (2) Chloromycetin (3) Neomycin (4) Penicillin

Last Answer : Streptomycin

In what year did Sir Alexander Fleming win the Nobel Prize for his discovery of penicillin ?

Description : In what year did Sir Alexander Fleming win the Nobel Prize for his discovery of penicillin ?

Last Answer : He was awarded the Nobel Prize in 1945.

Who invented Penicillin ? (1) William Harvey (2) Louis Pasteur (3) Alexander Fleming (4) Edward Jenner

Description : Who invented Penicillin ? (1) William Harvey (2) Louis Pasteur (3) Alexander Fleming (4) Edward Jenner

Last Answer : Alexander Fleming

Who invented penicillin ? (1) Alexander Fleming (2) Louis Pasteur (3) Dreser (4) Edward Jenner

Description : Who invented penicillin ? (1) Alexander Fleming (2) Louis Pasteur (3) Dreser (4) Edward Jenner

Last Answer : Alexander Fleming

Which one of the following scientists was NOT involved with discovering viruses? a. Felix d‘Herrelle b. Dimitri Ivanowsky c. Robert Fleming d. Martinus Beijerinck

Description : Which one of the following scientists was NOT involved with discovering viruses? a. Felix d‘Herrelle b. Dimitri Ivanowsky c. Robert Fleming d. Martinus Beijerinck

Last Answer : c. Robert Fleming

The idea of selective toxicity was first proposed by A- Antony van Leeuwenhoek B- Paul Ehrlich C- Louis Pasteur D- Alexander Fleming

Description : The idea of selective toxicity was first proposed by A- Antony van Leeuwenhoek B- Paul Ehrlich C- Louis Pasteur D- Alexander Fleming

Last Answer : Paul Ehrlich

Purification of petroleum is carried out by which method? -General Knowledge

Description : Purification of petroleum is carried out by which method? -General Knowledge

Last Answer : The answer is 'Fractional distillation'

Purification of petroleum is carried out by which method? -General Knowledge

Description : Purification of petroleum is carried out by which method? -General Knowledge

Last Answer : answer:

Purification of petroleum is carried out by which method? -General Knowledge

Description : Purification of petroleum is carried out by which method? -General Knowledge

Last Answer : answer:

If a metal has low oxygen affinity then the purification of metal may be carried out by :

Description : If a metal has low oxygen affinity then the purification of metal may be carried out by :

Last Answer : If a metal has low oxygen affinity then the purification of metal may be carried out by : A. liquation B. distillation C. zone refining D. cupellation

54 Pick up the correct statement from the following: A. The ratio of the quantity of the diluting water to that of the sewage, is known as dilution factor B. The automatic purification of polluted water, is known self purification phenomenon C. The photosynthesis is carried out in the presence of sun light D. All the above

Description : 54 Pick up the correct statement from the following: A. The ratio of the quantity of the diluting water to that of the sewage, is known as dilution factor B. The automatic purification of polluted ... phenomenon C. The photosynthesis is carried out in the presence of sun light D. All the above

Last Answer : ANS: D

Which of the following antibiotics work by targetting protein synthesis? a. Methicillin b. Chloramphenicol c. Penicillin d. Nystatin.

Description : Which of the following antibiotics work by targetting protein synthesis? a. Methicillin b. Chloramphenicol c. Penicillin d. Nystatin.

Last Answer : b. Chloramphenicol

Two major drawbacks to the use of ______ is allergies and beta- lactamases produced by resistant bacteria. a. Tetracyclineb. Penicillin c. Cephalosporin d. Bacitracin

Description : Two major drawbacks to the use of ______ is allergies and beta- lactamases produced by resistant bacteria. a. Tetracycline b. Penicillin c. Cephalosporin d. Bacitracin

Last Answer : b. Penicillin

Two drugs that affect cell wall synthesis are a. Erythromycin and penicillin. b. Vancomycin and cephalosporin. c. Tetracycline and polymyxin b. d. Chloramphenicol and streptomycin.

Description : Two drugs that affect cell wall synthesis are a. Erythromycin and penicillin. b. Vancomycin and cephalosporin. c. Tetracycline and polymyxin b. d. Chloramphenicol and streptomycin.

Last Answer : a. Erythromycin and penicillin.

Which one of the following pairs is incorrectly matched as to antibiotic and use? a. Penicillin-gram-positive bacteria b. Nystatin-fungi c. Tetracycline-viruses d. Griseofulvin-fungi

Description : Which one of the following pairs is incorrectly matched as to antibiotic and use? a. Penicillin-gram-positive bacteria b. Nystatin-fungi c. Tetracycline-viruses d. Griseofulvin-fungi

Last Answer : c. Tetracycline-viruses

____ is examples of drugs that are derived from the metabolism of microorganisms. a. Salvarsan b. Prontosil c. Penicillin d. A-C are correct

Description : ____ is examples of drugs that are derived from the metabolism of microorganisms. a. Salvarsan b. Prontosil c. Penicillin d. A-C are correct

Last Answer : c. Penicillin

Two cyclic polypeptide antibiotics are a. Vancomycin and streptomycin. b. Penicillin and cephalosporin. c. Bacitracin and polymyxins d. .gentamicin and chloramphenicol

Description : Two cyclic polypeptide antibiotics are a. Vancomycin and streptomycin. b. Penicillin and cephalosporin. c. Bacitracin and polymyxins d. .gentamicin and chloramphenicol

Last Answer : c. Bacitracin and polymyxins

Ehrlich and Hata discovered that was used to treat a. Salvarsan; syphilis b. penicillin; surgical wounds c. Salvarsan; malaria. d. Prontosil; malaria

Description : Ehrlich and Hata discovered that was used to treat a. Salvarsan; syphilis b. penicillin; surgical wounds c. Salvarsan; malaria. d. Prontosil; malaria

Last Answer : a. Salvarsan; syphilis

Medications that can be used early in influenza are ____ and ____ because they inhibit the release of new virions. a. aspirin, decongestants b. Relenza, Tamifluc. Penicillin, ampicillin d. AZT, ribivirin

Description : Medications that can be used early in influenza are ____ and ____ because they inhibit the release of new virions. a. aspirin, decongestants b. Relenza, Tamiflu c. Penicillin, ampicillin d. AZT, ribivirin

Last Answer : b. Relenza, Tamiflu

Though few in number, some drugs, such as _____, can be used to treat some viral infections. a. penicillin and ampicillin b. isoniazid and dapsone c. amantadine and acyclovir d. streptomycin and amphotericin

Description : Though few in number, some drugs, such as _____, can be used to treat some viral infections. a. penicillin and ampicillin b. isoniazid and dapsone c. amantadine and acyclovir d. streptomycin and amphotericin

Last Answer : c. amantadine and acyclovir

Penicillin resistance in staphylococci is acquired due to A.conjugation B.mutation C.transformation D.transduction

Description : Penicillin resistance in staphylococci is acquired due to A.conjugation B.mutation C.transformation D.transduction

Last Answer : D.transduction

An "International Unit" of penicillin activity established in 1944 is amount of penicillin equivalent to A.0.6 micrograms of crystalline penicillin G of about 98% purity B.0.6 micrograms of crystalline penicillin F of about 98% purity C.0.8 micrograms of crystalline penicillin G of about 98% purity D.0.8 micrograms of crystalline penicillin G of about 90% purity

Description : An "International Unit" of penicillin activity established in 1944 is amount of penicillin equivalent to A.0.6 micrograms of crystalline penicillin G of about 98% purity B.0.6 micrograms of crystalline ... G of about 98% purity D.0.8 micrograms of crystalline penicillin G of about 90% purity

Last Answer : A.0.6 micrograms of crystalline penicillin G of about 98% purity

Which of the following may be most likely to be missing from a gram-positive bacterium? A.Penicillin binding protein B.Peptidoglycan C.Lipopolysaccharide D.Phospholipid bilayer membrane

Description : Which of the following may be most likely to be missing from a gram-positive bacterium? A.Penicillin binding protein B.Peptidoglycan C.Lipopolysaccharide D.Phospholipid bilayer membrane

Last Answer : C.Lipopolysaccharide

Penicillin resistance in staphylococci is acquired due to A- conjugation B- mutation C- transformation D- transduction

Description : Penicillin resistance in staphylococci is acquired due to A- conjugation B- mutation C- transformation D- transduction

Last Answer : transduction

The last step in synthesis of peptidoglycan is A- attachment of a peptide to muramic acid B- attaching two amino acids to form a cross-link C- attachment of a portion of peptidoglycan to a membrane lipid D- binding of penicillin to a membrane protein

Description : The last step in synthesis of peptidoglycan is A- attachment of a peptide to muramic acid B- attaching two amino acids to form a cross-link C- attachment of a portion of peptidoglycan to a membrane lipid D- binding of penicillin to a membrane protein

Last Answer : attaching two amino acids to form a cross-link

Which of the following bacteria lack a cell wall and are therefore resistant to penicillin? A- Cyanobacteria B- Mycoplasmas C- .Bdellovibrios D- .Spirochetes

Description : Which of the following bacteria lack a cell wall and are therefore resistant to penicillin? A- Cyanobacteria B- Mycoplasmas C- .Bdellovibrios D- .Spirochetes

Last Answer : Mycoplasmas

Which of the following bacteria lack a cell wall and are therefore resistant to penicillin? A- Cyanobacteria B- Mycoplasmas C- BdellovibriosD- Spirochetes

Description : Which of the following bacteria lack a cell wall and are therefore resistant to penicillin? A- Cyanobacteria B- Mycoplasmas C- Bdellovibrios D- Spirochetes

Last Answer : Mycoplasmas

If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than the metal, then the purification of metal may be carried

Description : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than the metal, then the purification of metal may be carried

Last Answer : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than ... B. electrorefining C. Zone refining D. POILING

Which of the following is the false statement about antibiotics? (a) Some persons have allergy from antibiotics. (b) Antibiotics are capable of curing any disease. (c) This term was given by Waksman in 1942. (d) Antibiotics is produced by microorganisms.

Description : Which of the following is the false statement about antibiotics? (a) Some persons have allergy from antibiotics. (b) Antibiotics are capable of curing any disease. (c) This term was given by Waksman in 1942. (d) Antibiotics is produced by microorganisms.

Last Answer : (b) Antibiotics are capable of curing any disease.

Specialized transduction is carried out by a. Virulent Phages That Have A Lytic Cycle Of Infection. b. Temperate Phages Carrying A Entire Bacterial Chromosome. c. Temperate Phages That Carry A Segment Of Host Dna. d. Virulent Phages That Swap Dna Segments.

Description : Specialized transduction is carried out by a. Virulent Phages That Have A Lytic Cycle Of Infection. b. Temperate Phages Carrying A Entire Bacterial Chromosome. c. Temperate Phages That Carry A Segment Of Host Dna. d. Virulent Phages That Swap Dna Segments.

Last Answer : c. Temperate Phages That Carry A Segment Of Host Dna.

Commercial scale production of amino acids is typically carried out using A- regulatory mutants to cause overproduction of biochemical intermediates B- creation of an intentional increase in membrane permeability to increase release of the amino acids C- both (a) and (b) D- none of the above

Description : Commercial scale production of amino acids is typically carried out using A- regulatory mutants to cause overproduction of biochemical intermediates B- creation of an intentional increase in membrane permeability to increase release of the amino acids C- both (a) and (b) D- none of the above

Last Answer : both (a) and (b)

Quantitative measurement of bacterial growth can be carried out by measuring A-.cell count B- .cell mass C- .cell activity D- .all of these

Description : Quantitative measurement of bacterial growth can be carried out by measuring A-.cell count B- .cell mass C- .cell activity D- .all of these

Last Answer : .all of these

Babesiosis is carried by.___ and infects___________ a. Mosquitoes; Rbcs b. Fleas; The Kidneys c. Ticks; Rbcs d. Mosquitoes; The Liver

Description : Babesiosis is carried by.___ and infects___________ a. Mosquitoes; Rbcs b. Fleas; The Kidneys c. Ticks; Rbcs d. Mosquitoes; The Liver

Last Answer : c. Ticks; Rbcs

Which of the following is NOT a way to prevent food from being contaminated? a. Control The Initial Number Of Bacteria Present b. Prevent The Small Number From Growing c. Destroy Bacteria By Cooking Properly d. Avoid Recontamination After Cooking e. Re-Freeze Food After Cooking

Description : Which of the following is NOT a way to prevent food from being contaminated? a. Control The Initial Number Of Bacteria Present b. Prevent The Small Number From Growing c. Destroy Bacteria By Cooking Properly d. Avoid Recontamination After Cooking e. Re-Freeze Food After Cooking

Last Answer : e. Re-Freeze Food After Cooking

Which of the following is NOT a way to prevent food from being contaminated? a. Control The Initial Number Of Bacteria Present b. Prevent The Small Number From Growing c. Destroy Bacteria By Cooking Properly d. Avoid Recontamination After Cooking e. Re-Freeze Food After Cooking

Description : Which of the following is NOT a way to prevent food from being contaminated? a. Control The Initial Number Of Bacteria Present b. Prevent The Small Number From Growing c. Destroy Bacteria By Cooking Properly d. Avoid Recontamination After Cooking e. Re-Freeze Food After Cooking

Last Answer : e. Re-Freeze Food After Cooking

An antigen binding site on the IgG antibody is a combination of a. One variable region from a light chain and one from a heavy chain. b. Two variable regions from two light chains. c. Two variable regions from two heavy chainsd. One variable region from a constant region and one from a variable region..

Description : An antigen binding site on the IgG antibody is a combination of a. One variable region from a light chain and one from a heavy chain. b. Two variable regions from two light chains. c. Two ... from two heavy chains. d. One variable region from a constant region and one from a variable region.

Last Answer : a. One variable region from a light chain and one from a heavy chain.

Where is the most ATP produced in cellular respiration? a. Fermentation b. Electron Transport Chain c. Glycolysis d. Citric Acid Cycle

Description : Where is the most ATP produced in cellular respiration? a. Fermentation b. Electron Transport Chain c. Glycolysis d. Citric Acid Cycle

Last Answer : b. Electron Transport Chain

The electron transport chain is directly involved with a. ATP Synthesis b. CO2 Production. c. H + Pumping d. Generating Oxygen Gas.

Description : The electron transport chain is directly involved with a. ATP Synthesis b. CO2 Production. c. H + Pumping d. Generating Oxygen Gas.

Last Answer : a. ATP Synthesis

The acquisition energy by glucose fermentation requires A.substrate-level phosphorylation B.electron transport of electrons from NADH C.long-chain fatty acid oxidation D.the enzyme formic-hydrogen lyase

Description : The acquisition energy by glucose fermentation requires A.substrate-level phosphorylation B.electron transport of electrons from NADH C.long-chain fatty acid oxidation D.the enzyme formic-hydrogen lyase

Last Answer : A.substrate-level phosphorylation

Which of the following theory of antibody production is most widely accepted? A- Side chain theory B- Clonal selection theory C- Direct template theory D- Indirect template theory

Description : Which of the following theory of antibody production is most widely accepted? A- Side chain theory B- Clonal selection theory C- Direct template theory D- Indirect template theory

Last Answer : Clonal selection theory

Which of the following infection(s) can be diagnosed by the use of polymerase chain reaction? A- HIV-1 and HIV-2 viruses B- Hepatitis B virus C- Mycobacterium tuberculosis D- All of these

Description : Which of the following infection(s) can be diagnosed by the use of polymerase chain reaction? A- HIV-1 and HIV-2 viruses B- Hepatitis B virus C- Mycobacterium tuberculosis D- All of these

Last Answer : All of these

Most of the energy in aerobic respiration of glucose is captured by A- substrate-level phosphorylation B- electron transport of electrons from NADH C- long-chain fatty acid oxidation D- the enzyme formic-hydrogen lyase

Description : Most of the energy in aerobic respiration of glucose is captured by A- substrate-level phosphorylation B- electron transport of electrons from NADH C- long-chain fatty acid oxidation D- the enzyme formic-hydrogen lyase

Last Answer : electron transport of electrons from NADH

Site in the ribosome from which the tRNA donates amino acids to the growingpolypeptide chain is A- P site B- O site C- T site D- A site

Description : Site in the ribosome from which the tRNA donates amino acids to the growing polypeptide chain is A- P site B- O site C- T site D- A site

Last Answer : P site

What is the maximum number of different amino acids in a polypeptide chain coded by the synthetic polyribonucleotides (UCAG)5? A- One B- Two C- Three D- Four

Description : What is the maximum number of different amino acids in a polypeptide chain coded by the synthetic polyribonucleotides (UCAG)5? A- One B- Two C- Three D- Four

Last Answer : Three

A mycelium describes A- saclike structure where fungal spores are produced B- single fungal strand made up of a long chain of cells C- interwoven mass of numerous hyphae D- none of the above

Description : A mycelium describes A- saclike structure where fungal spores are produced B- single fungal strand made up of a long chain of cells C- interwoven mass of numerous hyphae D- none of the above

Last Answer : interwoven mass of numerous hyphae

The phospholipids present in cytoplasm membrane of the archaeo- bacteria is A- phosphoglycerides B- polyisoprenoid C- polyisoprenoid branched chain lipids D- none of the bove

Description : The phospholipids present in cytoplasm membrane of the archaeo- bacteria is A- phosphoglycerides B- polyisoprenoid C- polyisoprenoid branched chain lipids D- none of the bove

Last Answer : polyisoprenoid branched chain lipids

An important method used in the rapid identification of a pathogen is a. RNA gene sequencing b. polymerase chain reaction c. molecular taxonomy d. biochemical tests

Description : An important method used in the rapid identification of a pathogen is a. RNA gene sequencing b. polymerase chain reaction c. molecular taxonomy d. biochemical tests

Last Answer : d. biochemical tests

Anyone know how to re-insert the pull chain back into a window shade?

Description : Anyone know how to re-insert the pull chain back into a window shade?

Last Answer : You will have to turn the blind by hand as you insert the bead chain.