How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?

How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?
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How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?
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How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?

Description : How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?

Last Answer : How many chiral carbon atoms does Tetrachycline A (a broad spectrum antibiotic) have ?

All the following conditions produce a real or functional deficiency of vitamin K except (A) Prolonged oral, broad spectrum antibiotic therapy (B) Total lack of red meat in the diet (C) The total lack of green leafy vegetables in the diet (D) Being a new born infant

Description : All the following conditions produce a real or functional deficiency of vitamin K except (A) Prolonged oral, broad spectrum antibiotic therapy (B) Total lack of red meat in the diet (C) The total lack of green leafy vegetables in the diet (D) Being a new born infant

Last Answer : Answer : B

The use of prophylactic antibiotics has become commonplace. Which of the following statement(s) is/are true concerning the prophylactic use of antibiotics? a. The appropriate use of prophylactic antibiotics must include the initiation of the agent prior to the surgical procedure b. Continuing the antibiotic into the postoperative period has led to improved results in antibiotic prophylaxis c. The prophylactic administration of broad-spectrum agents (third-generation cephalosporins) has been shown to be particularly advantageous d. The topical use of antimicrobial agents is of no advantage in the prophylactic setting

Description : The use of prophylactic antibiotics has become commonplace. Which of the following statement(s) is/are true concerning the prophylactic use of antibiotics? a. The appropriate use of prophylactic ... d. The topical use of antimicrobial agents is of no advantage in the prophylactic setting

Last Answer : Answer: a Intravenous administration of an antibiotic is clearly indicated for patients undergoing clean contaminated operations. These antibiotics should be administered prior to surgery ... of antimicrobial agents is equivalent to the administration of intravenous antimicrobial agent antibiotics

Distinguish between a narrow spectrum and broad spectrum antibiotic.

Description : Distinguish between a narrow spectrum and broad spectrum antibiotic.

Last Answer : Ans. A narrow spectrum antibiotic works against a limited range of microbes whereas a broad spectrum antibiotic works against a large variety of microbes. 

Choose the correct statement about tetracyclines: A. Being broad spectrum antibioics they are dependable for empirical treatment of lifethreatening infections B. Currently, they are not the first choice antibiotic for any specific infection C. They reduce stool volume and duration of diarrhoea in cholera D. The are preferred for treatment of anaerobic bacterial infections

Description : Choose the correct statement about tetracyclines: A. Being broad spectrum antibioics they are dependable for empirical treatment of lifethreatening infections B. Currently, they are not the first ... of diarrhoea in cholera D. The are preferred for treatment of anaerobic bacterial infections

Last Answer : C. They reduce stool volume and duration of diarrhoea in cholera

The following strategy will promote rather than curb emergence of antibiotic resistant micro-organisms: A. Whenever possible use broad spectrum antibiotics B. Prefer a narrow spectrum antibiotic to a broad spectrum one if both are equally effective C. Prefer short and intensive courses of antibiotics D. Use antibiotic combinations for prolonged therapy

Description : The following strategy will promote rather than curb emergence of antibiotic resistant micro-organisms: A. Whenever possible use broad spectrum antibiotics B. Prefer a narrow spectrum ... Prefer short and intensive courses of antibiotics D. Use antibiotic combinations for prolonged therapy

Last Answer : A. Whenever possible use broad spectrum antibiotics

The following drug reduces the effect of oral anticoagulants: A. Broad spectrum antibiotic B. Cimetidine C. Aspirin D. Oral contraceptive

Description : The following drug reduces the effect of oral anticoagulants: A. Broad spectrum antibiotic B. Cimetidine C. Aspirin D. Oral contraceptive

Last Answer : D. Oral contraceptive

Number of chiral carbon atoms in the compound W, X, Y and Z respectively would be :

Description : Number of chiral carbon atoms in the compound W, X, Y and Z respectively would be :

Last Answer : Number of chiral carbon atoms in the compound W, X, Y and Z respectively would be :

A diabetic develops a severe perineal infection with skin necrosis, subcutaneous crepitance, and drainage of a thin, watery, grayish and foul-smelling fluid. Management should consist of: a. Gram stain of the fluid, which will likely demonstrate multiple bacteria including predominantly gram-positive rods b. A CT scan is indicated in a stable patient to define the extent of the disease c. Broad spectrum antibiotics followed with prompt extensive debridement is indicated d. A safe guideline is to resect infected necrotic tissue so that a several centimeter margin of grossly normal, healthy tissue can be achieved e. A colostomy is of little benefit in this situation

Description : A diabetic develops a severe perineal infection with skin necrosis, subcutaneous crepitance, and drainage of a thin, watery, grayish and foul-smelling fluid. Management should consist of: a. Gram stain ... normal, healthy tissue can be achieved e. A colostomy is of little benefit in this situation

Last Answer : Answer: a, b, c, d The presence of severe perineal infection (referred to as Fournier gangrene when this process involves the perineum and scrotum in males) is associated with a ... often provides improved wound care and patient management, although it is not invariably a positive outcome

Lidocaine is the preferred antiarrhythmic for emergency control of cardiac arrhythmias following acute myocardial infarction because (a) It has a rapidly developing and titratable antiarrhythmic action (b) It casues little myocardial depression and hypotension (c) It has broad spectrum antiarrhythmic efficacy in atrial as well as ventricular arrhythmias (d) Both (a) and (b)

Description : Lidocaine is the preferred antiarrhythmic for emergency control of cardiac arrhythmias following acute myocardial infarction because (a) It has a rapidly developing and titratable antiarrhythmic action (b) It casues ... efficacy in atrial as well as ventricular arrhythmias (d) Both (a) and (b)

Last Answer : Ans: D

An advantage of bleomycin over most antineoplastic drugs is its (a) Rapid onset of action (b) Lack of toxicity to all normal cells (c) Relative lack of bone marrow toxicity (d) Very broad spectrum of activity (e) Both (a) and (b)

Description : An advantage of bleomycin over most antineoplastic drugs is its (a) Rapid onset of action (b) Lack of toxicity to all normal cells (c) Relative lack of bone marrow toxicity (d) Very broad spectrum of activity (e) Both (a) and (b)

Last Answer : Ans: C

Broad spectrum antibiotics are one which attack (a) Pathogens as well as host (b) A wide range of pathogens (c) Only pathogens (d) Only host

Description : Broad spectrum antibiotics are one which attack (a) Pathogens as well as host (b) A wide range of pathogens (c) Only pathogens (d) Only host

Last Answer : Ans:(b)

Defination of Broad spectrum Antibiotics

Description : Defination of Broad spectrum Antibiotics

Last Answer : Broad spectrum Antibiotics- Antibiotics which are effective against several different types of harmful micro-organisms and thus, capable of curing several infections are called broad spectrum antibiotics Example chloromycetin, Tetracycline .

Broad spectrum anthelmintics include D A. Benzimidazoles B. Triclabendazole C. Organophosphate D. Both a and b

Description : Broad spectrum anthelmintics include D A. Benzimidazoles B. Triclabendazole C. Organophosphate D. Both a and b

Last Answer : Both a and b

A biocontrol agent to be a part of an integrated pest management should be (a) species-specific and symbiotic (b) free living and broad spectrum (c) narrow spectrum and symbiotic (d) species-specific and inactive on non-target organisms.

Description : A biocontrol agent to be a part of an integrated pest management should be (a) species-specific and symbiotic (b) free living and broad spectrum (c) narrow spectrum and symbiotic (d) species-specific and inactive on non-target organisms.

Last Answer : (d) species-specific and inactive on non-target organisms.

Line spectrum is obtained on the screen in the form of lines if the slit in front of the source is a) narrow square b) broad square c) narrow rectangle d) broad rectangle

Description : Line spectrum is obtained on the screen in the form of lines if the slit in front of the source is a) narrow square b) broad square c) narrow rectangle d) broad rectangle

Last Answer : c) narrow rectangle

A broad-spectrum herbicide in groundnut a). Fluchloralin b). Atrazine c). Alachlor d). 2,4-D

Description : A broad-spectrum herbicide in groundnut a). Fluchloralin b). Atrazine c). Alachlor d). 2,4-D

Last Answer : a). Fluchloralin

The following statement is not true of sulbactam: A. It is a broad spectrum β-lactamase inhibitor B. It does not augment the activity of ampicillin against bacteria that are sensitive to the latter C. It induces chromosomal β-lactamases D. Combined with ampicillin, it is highly effective against penicillinase producing N. gonorrhoeae

Description : The following statement is not true of sulbactam: A. It is a broad spectrum β-lactamase inhibitor B. It does not augment the activity of ampicillin against bacteria that are sensitive ... β-lactamases D. Combined with ampicillin, it is highly effective against penicillinase producing N. gonorrhoeae

Last Answer : C. It induces chromosomal β-lactamases

The following is/are true of mesalazine: A. It exerts mainly local antiinflammatory action in the lower gut B. It is a broad spectrum antidiarrhoeal drug C. It can be administered as a retention enema D. Both 'A' and 'C

Description : The following is/are true of mesalazine: A. It exerts mainly local antiinflammatory action in the lower gut B. It is a broad spectrum antidiarrhoeal drug C. It can be administered as a retention enema D. Both 'A' and 'C

Last Answer : D. Both 'A' and 'C

Choose the antiarrhythmic drug which prolongs action potential, can aggravate atrioventricular block but not heart failure, and has broad spectrum utility in acute as well as chronic, and ventricular as well as supraventricular arrhythmias: A. Quinidine B. Amiodarone C. Mexiletine D. Diltiazem

Description : Choose the antiarrhythmic drug which prolongs action potential, can aggravate atrioventricular block but not heart failure, and has broad spectrum utility in acute as well as chronic, and ventricular as well as supraventricular arrhythmias: A. Quinidine B. Amiodarone C. Mexiletine D. Diltiazem

Last Answer : B. Amiodarone

Lignocaine is the preferred antiarrhythmic for emergency control of cardiac arrhythmias following acute myocardial infarction because: A. It has a rapidly developing and titratable antiarrhythmic action B. It causes little myocardial depression and hypotension C. It has broad spectrum antiarrhythmic efficacy in atrial as well as ventricular arrhythmias D. Both ‘A’ and ‘B’ are correct

Description : Lignocaine is the preferred antiarrhythmic for emergency control of cardiac arrhythmias following acute myocardial infarction because: A. It has a rapidly developing and titratable antiarrhythmic action B. It causes ... atrial as well as ventricular arrhythmias D. Both A' and B' are correct

Last Answer : D. Both ‘A’ and ‘B’ are correct

The following is true of topiramate except: A. It is a broad spectrum antiepileptic drug B. It inhibits the enzyme carbonic anhydrase C. It is used as add-on therapy in refractory partial seizures D. It is not effective in generalized tonic-clonic seizures

Description : The following is true of topiramate except: A. It is a broad spectrum antiepileptic drug B. It inhibits the enzyme carbonic anhydrase C. It is used as add-on therapy in refractory partial seizures D. It is not effective in generalized tonic-clonic seizures

Last Answer : D. It is not effective in generalized tonic-clonic seizures

Choose the correct statement about lamotrigine: A. It is a dopaminergic agonist used in parkinsonism B. It acts by blocking NMDA-type of glutamate receptors C. It is a broad spectrum antiepileptic drug D. It suppresses tonic-clonic seizures, but worsens absence seizures

Description : Choose the correct statement about lamotrigine: A. It is a dopaminergic agonist used in parkinsonism B. It acts by blocking NMDA-type of glutamate receptors C. It is a broad spectrum antiepileptic drug D. It suppresses tonic-clonic seizures, but worsens absence seizures

Last Answer : C. It is a broad spectrum antiepileptic drug

Superinfections are more common with (a) Use of narrow spectrum antibiotics (b) Short courses of antibiotics (c) Use of antibiotics that are completely absorbed from the small intestines (d) Use of antibiotic combinations covering both gram positive and gram negative bacteria

Description : Superinfections are more common with (a) Use of narrow spectrum antibiotics (b) Short courses of antibiotics (c) Use of antibiotics that are completely absorbed from the small intestines (d) Use of antibiotic combinations covering both gram positive and gram negative bacteria

Last Answer : Ans: D

Which among the following is a large spectrum Antibiotic? (1) Paracetamol (2) Pencillin (3) Ampicillin (4) Chlormphenicol

Description : Which among the following is a large spectrum Antibiotic? (1) Paracetamol (2) Pencillin (3) Ampicillin (4) Chlormphenicol

Last Answer : (3) Ampicillin Explanation: Ampicillin is the large spectrum anti-biotic most commonly used. Ampicillin is a beta-lactam antibiotic that is part of the aminopenicillin family and is ... patients that may unwittingly have mononucleosis) to potentially lethal allergic reactions such as anaphylaxis.

Superinfections are more common with: A. Use of narrow spectrum antibiotics B. Short courses of antibiotics C. Use of antibiotics that are completely absorbed from the small intestines D. Use of antibiotic combinations covering both gram positive and gram negative bacteria

Description : Superinfections are more common with: A. Use of narrow spectrum antibiotics B. Short courses of antibiotics C. Use of antibiotics that are completely absorbed from the small intestines D. Use of antibiotic combinations covering both gram positive and gram negative bacteria

Last Answer : D. Use of antibiotic combinations covering both gram positive and gram negative bacteria

Which among the following is a large spectrum Antibiotic ? (1) Paracetamol (2) Pencillin (3) Ampicillin (4) Chlormphenicol

Description : Which among the following is a large spectrum Antibiotic ? (1) Paracetamol (2) Pencillin (3) Ampicillin (4) Chlormphenicol

Last Answer : Ampicillin

Molecular formula of smallest ester which contain one chiral carbon is :

Description : Molecular formula of smallest ester which contain one chiral carbon is :

Last Answer : Molecular formula of smallest ester which contain one chiral carbon is : A. `C_(4)H_(8)O_(2)` B. `C_(5)H_(12)O ... )H_(12)O_(2)` D. `C_(5)H_(10)O_(2)`

Molecular formula of smallest ester which contain one chiral carbon is :

Description : Molecular formula of smallest ester which contain one chiral carbon is :

Last Answer : Molecular formula of smallest ester which contain one chiral carbon is : A. `C_(4)H_(8)O_(2)` B. `C_(5)H_(12)O ... )H_(12)O_(2)` D. `C_(5)H_(10)O_(2)`

Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset(|)(Br))(C)H-underset(overset(|

Description : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset(|)(Br))(C)H-underset(overset(|

Last Answer : Number of chiral carbon persent in the following compound: `CH_(3)-underset(overset(|)(OH))(C)H-CH_(2)-underset(overset( ... (3)` A. 2 B. 3 C. 4 D. 5

Glycine is a unique amino acid because it (a) has no chiral carbon (b) has a sulfur containing R group (c) cannot form a peptide bond (d) is an essential amino acid

Description : Glycine is a unique amino acid because it (a) has no chiral carbon (b) has a sulfur containing R group (c) cannot form a peptide bond (d) is an essential amino acid

Last Answer : has no chiral carbon

Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Description : Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Last Answer : (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Explanation: Sodium Vapour Lamps glow with yellow colour due to the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum.

Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Description : Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Last Answer : the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum

Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolve

Description : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolve

Last Answer : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts ... . 1-phenylethanamine C. 1-cyclohexylethanamine D. N-ethylaniline

Among the isomers of Dimethylcyclohexanes, the chiral ones are

Description : Among the isomers of Dimethylcyclohexanes, the chiral ones are

Last Answer : Among the isomers of Dimethylcyclohexanes, the chiral ones are A. 1, 2-trans and 1,3-cis B. 1, 2-cis and 1, ... 1, 4-tans D. 1, 2-trans and 1, 3-trans

Among the isomers of Dimethylcyclohexanes, the chiral ones are

Description : Among the isomers of Dimethylcyclohexanes, the chiral ones are

Last Answer : Among the isomers of Dimethylcyclohexanes, the chiral ones are A. 1, 2-trans and 1,3-cis B. 1, 2-cis and 1, ... 1, 4-tans D. 1, 2-trans and 1, 3-trans

Which of the following molecule is chiral.

Description : Which of the following molecule is chiral.

Last Answer : Which of the following molecule is chiral. A. B. C. D.

Which of the following is/are chiral?

Description : Which of the following is/are chiral?

Last Answer : Which of the following is/are chiral? A. B. C. D.

Which of the following are chiral:

Description : Which of the following are chiral:

Last Answer : Which of the following are chiral: A. `1, 2, 3` B. `1, 2, 4` C. `2, 3, 4` D. `1, 3, 4`

The compound which has maximum number of chiral centres is

Description : The compound which has maximum number of chiral centres is

Last Answer : The compound which has maximum number of chiral centres is A. B. C. D.

Chiral molecules are :

Description : Chiral molecules are :

Last Answer : Chiral molecules are : A. Superimposable on their mirro image B. Not superimposable on ... molecules D. capable of showing geometrical isomerism

Which of the following are chiral compound.

Description : Which of the following are chiral compound.

Last Answer : Which of the following are chiral compound.

Which of the following are chiral molecules

Description : Which of the following are chiral molecules

Last Answer : Which of the following are chiral molecules

Among the following, the chiral complex is :

Description : Among the following, the chiral complex is :

Last Answer : Among the following, the chiral complex is : A. `[Cr(OX)_(3)]^(3-)` B. `cis-[PtCl_(2)(en)]` C. `cis-[ ... (3))_(4)]^(+)` D. `trans-[PtCl_(2)(en)]`

In the `S_(N^(1))` reaction on chiral centres there is :

Description : In the `S_(N^(1))` reaction on chiral centres there is :

Last Answer : In the `S_(N^(1))` reaction on chiral centres there is : A. `100%` racemization B. ... partial racemization C. `100%` retention D. `100%` inversion

A chiral `C_(5)H_(10)O` alcohol is reduced by catalytic hydrogenation to an achiral `C_(5)H_(12)O` alcohol. The original alcohol is oxidized by activa

Description : A chiral `C_(5)H_(10)O` alcohol is reduced by catalytic hydrogenation to an achiral `C_(5)H_(12)O` alcohol. The original alcohol is oxidized by activa

Last Answer : A chiral `C_(5)H_(10)O` alcohol is reduced by catalytic hydrogenation to an achiral `C_(5)H_(12)O` alcohol ... -2-buten-1-ol D. 2-methyl-2-buten-1-ol

All the standard amino acids except the following have one chiral ‘c’ atom: (A) Threonine, Isoleucine (B) Isoleucine, Alanine (C) Threonine, Alanine (D) Alanine, Glutamine

Description : All the standard amino acids except the following have one chiral ‘c’ atom: (A) Threonine, Isoleucine (B) Isoleucine, Alanine (C) Threonine, Alanine (D) Alanine, Glutamine

Last Answer : Answer : C

All chiral D-sugars rotate plane-polarized light : (a) clockwise (b) counterclockwise (c) +20.0° (d) in a direction that cannot be predicted but must be determined experimentally

Description : All chiral D-sugars rotate plane-polarized light : (a) clockwise (b) counterclockwise (c) +20.0° (d) in a direction that cannot be predicted but must be determined experimentally

Last Answer : in a direction that cannot be predicted but must be determined experimentally

Which of the following compounds is never chiral? (a) 2,3-dibromobutane (b) 1,3-dibromobutane (c) 1,2-dichlorobutane (d) 1,4-dibromobutane

Description : Which of the following compounds is never chiral? (a) 2,3-dibromobutane (b) 1,3-dibromobutane (c) 1,2-dichlorobutane (d) 1,4-dibromobutane

Last Answer : 1,4-dibromobutane

Which of the following is a true statement? (a) All chiral molecules possess a plane of symmetry. (b) All achiral molecules are meso. (c) All molecules which possess a single asymmetric center of the S configuration are levorotatory. (d) A mixture of achiral compounds will be optically inactive

Description : Which of the following is a true statement? (a) All chiral molecules possess a plane of symmetry. (b) All achiral molecules are meso. (c) All molecules which possess a single asymmetric center of the S configuration are levorotatory. (d) A mixture of achiral compounds will be optically inactive

Last Answer : A mixture of achiral compounds will be optically inactive