In the following reaction, Alanine acts as a 3 3 3 3 + + → H H | | H N – – COO —— H N – – COOH C C | | CH CH (A) Acid (B) Base (C) Zwitter ion (D) None of these

In the following reaction, Alanine acts as a 3 3 3 3 + + → H H | | H N – – COO —— H N – – COOH C C | | CH CH (A) Acid (B) Base (C) Zwitter ion (D) None of these
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Answer : C
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At neutral pH Alanine has the following structure: (A) − − 2 3 H H N C COOH CH (B) + 3 − − 3 H H N C COO CH (C) 2 − − 3 H H N C COO CH (D) + 2 − − 3 H H N C COO CH

Description : At neutral pH Alanine has the following structure: (A) − − 2 3 H H N C COOH CH (B) + 3 − − 3 H H N C COO CH (C) 2 − − 3 H H N C COO CH (D) + 2 − − 3 H H N C COO CH

Last Answer : Answer : B

What is Zwitter ion? Write the formula of Zwitter ion of alanine.

Description : What is Zwitter ion? Write the formula of Zwitter ion of alanine.

Last Answer : Ans:- The ion of a molecule having +ve change at one end and –ve charge at other is called zwitter ion.

The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following options is correct? – HN – CH – CO – NH – CH – CO – NH – CH – CO – HN – CH – CO – CH2 OH CH2 SH CH2 OH CH2 CH2 CH2– COOH A B C D (a) D is the acidic amino acid-glutamic acid. (b) C is an aromatic amino acid-tryptophan. (c) A is the C-terminal amino acid and D is N-terminal amino acid. (d) A is a sulphur containing amino acid methionine.

Description : The figure shows a hypothetical tetrapeptide portion of a protein with parts labelled A-D. Which one of the following options is correct? - HN - CH - CO - NH - CH - CO - NH - CH - CO - ... -terminal amino acid and D is N-terminal amino acid. (d) A is a sulphur containing amino acid methionine.

Last Answer : (a) D is the acidic amino acid-glutamic acid.

An amino acid not containing the usual— COOH group is (A) Alanine (B) Tryptophan (C) Methionine (D) Taurine

Description : An amino acid not containing the usual— COOH group is (A) Alanine (B) Tryptophan (C) Methionine (D) Taurine

Last Answer : Answer : D

The racemic mixture of Alanine `(CH_(3)-underset(NH_(2))underset(|)(C )H-COOH)` can be resolved by using, (1) (+) -2-Butanol (2) (l)-2-Chlorobutanoic

Description : The racemic mixture of Alanine `(CH_(3)-underset(NH_(2))underset(|)(C )H-COOH)` can be resolved by using, (1) (+) -2-Butanol (2) (l)-2-Chlorobutanoic

Last Answer : The racemic mixture of Alanine `(CH_(3)-underset(NH_(2))underset(|)(C )H-COOH)` can be resolved by using, (1) ... 3 only C. 2 & 4 only D. 3 & 4 only

A Zwitter ion is one which has in aqueous solution: (A) One positive charge and one negative charge (B) Two positive charges and one negative charge (C) Two negative charges and one positive charge (D) No electrical charges at all

Description : A Zwitter ion is one which has in aqueous solution: (A) One positive charge and one negative charge (B) Two positive charges and one negative charge (C) Two negative charges and one positive charge (D) No electrical charges at all

Last Answer : Answer : A

`CH_(3)CH_(2)-CH_(2)-COOH overset("Red + P" +Br_(2))toCH_(3)-CH_(2)-underset(Br)underset(|)(CH)-COOH` This reaction is called

Description : `CH_(3)CH_(2)-CH_(2)-COOH overset("Red + P" +Br_(2))toCH_(3)-CH_(2)-underset(Br)underset(|)(CH)-COOH` This reaction is called

Last Answer : `CH_(3)CH_(2)-CH_(2)-COOH overset("Red + P" +Br_(2))toCH_(3)-CH_(2)-underset(Br)underset(|)(CH)-COOH` This reaction is called

`CH_(3)CH_(2)-CH_(2)-COOH overset("Red + P" +Br_(2))toCH_(3)-CH_(2)-underset(Br)underset(|)(CH)-COOH` This reaction is called

Description : `CH_(3)CH_(2)-CH_(2)-COOH overset("Red + P" +Br_(2))toCH_(3)-CH_(2)-underset(Br)underset(|)(CH)-COOH` This reaction is called

Last Answer : `CH_(3)CH_(2)-CH_(2)-COOH overset("Red + P" +Br_(2))toCH_(3)-CH_(2)-underset(Br)underset(|)(CH)-COOH` This reaction is called

The compound having the formula H2N—CO—NH—CH2—CH2—CH2—CH— COOH is | NH2 (A) Lysine (B) Glutamine (C) Serine (D) Citrulline

Description : The compound having the formula H2N—CO—NH—CH2—CH2—CH2—CH— COOH is | NH2 (A) Lysine (B) Glutamine (C) Serine (D) Citrulline

Last Answer : Answer : D

Cysteine has the formula: (A) CH3SH (B) H2N—CH2—COOH (C) HS—CH2—CH(NH2)—COOH (D) S—CH2—CH(NH2)—COOH | S—CH2—CH(NH2)—COOH

Description : Cysteine has the formula: (A) CH3SH (B) H2N—CH2—COOH (C) HS—CH2—CH(NH2)—COOH (D) S—CH2—CH(NH2)—COOH | S—CH2—CH(NH2)—COOH

Last Answer : Answer : C

Name the given reaction and enzyme involved in it `underset("Amino donor")(R_(1)-underset(NH_(3)^(+))underset(|)overset(H)overset(|)(C)-COO^(-)+unders

Description : Name the given reaction and enzyme involved in it `underset("Amino donor")(R_(1)-underset(NH_(3)^(+))underset(|)overset(H)overset(|)(C)-COO^(-)+unders

Last Answer : Name the given reaction and enzyme involved in it `underset("Amino donor")(R_(1)-underset(NH_(3)^(+)) ... underset(|)overset(H)overset(|)(C)-COO^(-)`

The amino acid exist as Zwitter ions when they are in (A) solid state (B) acidic solution (C) alkaline solution (D) neutral solution

Description : The amino acid exist as Zwitter ions when they are in (A) solid state (B) acidic solution (C) alkaline solution (D) neutral solution

Last Answer : Answer : D

How many geometrical isomers are possible for the given compound? Ph-CH=CH-CH=CH-COOH

Description : How many geometrical isomers are possible for the given compound? Ph-CH=CH-CH=CH-COOH

Last Answer : How many geometrical isomers are possible for the given compound? Ph-CH=CH-CH=CH-COOH A. 2 B. 4 C. 6 D. 8

In the reaction of propene with HCl, H+ ion acts as the : (a) electrophile (b) carbonium ion (c) nucleophile (d) carbanion

Description : In the reaction of propene with HCl, H+ ion acts as the : (a) electrophile (b) carbonium ion (c) nucleophile (d) carbanion

Last Answer : electrophile

Amino acids excepting histidine are not good buffering agents in cell because (A) They exist as zwitter ions (B) Their pk and not in the physiological pH of a cell (C) Only Histidine has pk of its R group at 6.0 unlike the others which have at a different pH (D) None of these

Description : Amino acids excepting histidine are not good buffering agents in cell because (A) They exist as zwitter ions (B) Their pk and not in the physiological pH of a cell (C) Only Histidine has pk of its R group at 6.0 unlike the others which have at a different pH (D) None of these

Last Answer : Answer : C

Which of the following statements about the reaction given below are correct? MnO2 + 4HCI → MnCl2 +2H20 + Cl2 (i) HCl is oxidized to Cl2 (ii) MnO2 is reduced to MnCl2 (iii) MnCl2 acts as an oxidizing agent (iv) HCl acts as an oxidizing agent (a) (i), (iii) and (iv) (b) (i), (ii) and (iii) (c) (i) and (ii) only (d) (iii) and (iv) only

Description : Which of the following statements about the reaction given below are correct? MnO2 + 4HCI → MnCl2 +2H20 + Cl2 (i) HCl is oxidized to Cl2 (ii) MnO2 is reduced to MnCl2 (iii) MnCl2 acts as an oxidizing agent (iv) HCl acts ... b) (i), (ii) and (iii) (c) (i) and (ii) only (d) (iii) and (iv) only

Last Answer : Answer: . (c)

The first amino acid incorporated in a polypeptide in a ribosome of a human is (A) N formyl methionine (B) Methionine (C) Phenyl alanine (D) Hydroxy lysine

Description : The first amino acid incorporated in a polypeptide in a ribosome of a human is (A) N formyl methionine (B) Methionine (C) Phenyl alanine (D) Hydroxy lysine

Last Answer : Answer : B

The product P of the following reaction is `CH_(3)-COOH overset(LiAlH_(4))to overset(SOCl_(2))to overset(Koverset(14)(C)N)to overset(H_(3)O^(o+)) to P

Description : The product P of the following reaction is `CH_(3)-COOH overset(LiAlH_(4))to overset(SOCl_(2))to overset(Koverset(14)(C)N)to overset(H_(3)O^(o+)) to P

Last Answer : The product P of the following reaction is `CH_(3)-COOH overset(LiAlH_(4))to overset(SOCl_(2))to overset(Koverset ... )N)to overset(H_(3)O^(o+)) to P`

The product P of the following reaction is `CH_(3)-COOH overset(LiAlH_(4))to overset(SOCl_(2))to overset(Koverset(14)(C)N)to overset(H_(3)O^(o+)) to P

Description : The product P of the following reaction is `CH_(3)-COOH overset(LiAlH_(4))to overset(SOCl_(2))to overset(Koverset(14)(C)N)to overset(H_(3)O^(o+)) to P

Last Answer : The product P of the following reaction is `CH_(3)-COOH overset(LiAlH_(4))to overset(SOCl_(2))to overset(Koverset ... )N)to overset(H_(3)O^(o+)) to P`

Which of the following can distinguish? `CH_(3)-overset(CH_(3))overset(|)(CH)-NH_(2)` and `CH_(3)-overset(H)overset(|)(N)-CH_(3)`

Description : Which of the following can distinguish? `CH_(3)-overset(CH_(3))overset(|)(CH)-NH_(2)` and `CH_(3)-overset(H)overset(|)(N)-CH_(3)`

Last Answer : Which of the following can distinguish? `CH_(3)-overset(CH_(3))overset(|)(CH)-NH_(2)` and `CH_(3)-overset(H ... `Cs_(2),HgCI_(2)` D. `Ag_(2)O //Delta`

In the reaction of ethylene with H2O in the presence of sulfuric acid, which one adds across the double bond first? (a) H+ (b) H. (c) HO– (d) sulfate ion

Description : In the reaction of ethylene with H2O in the presence of sulfuric acid, which one adds across the double bond first? (a) H+ (b) H. (c) HO– (d) sulfate ion

Last Answer : H+

Chloride shift is (A) H ions leaving the RBC in exchange of Cl- (B) Cl– leaving the RBC in exchange of bicarbonate (C) Bicarbonate ion returns to plasma and exchanged with chloride which shifts into the cell (D) Carbonic acid to the plasma

Description : Chloride shift is (A) H ions leaving the RBC in exchange of Cl- (B) Cl– leaving the RBC in exchange of bicarbonate (C) Bicarbonate ion returns to plasma and exchanged with chloride which shifts into the cell (D) Carbonic acid to the plasma

Last Answer : Answer : C

`CH_(3)CH_(2)CH(OH)CH(CH_(3))_(2)+CH_(3)COCI overset("base")rarr CH_(3)CH_(2)CH(OCOCH_(3))CH(CH_(3))_(2)+HCI` In the above reaction, if the reactant a

Description : `CH_(3)CH_(2)CH(OH)CH(CH_(3))_(2)+CH_(3)COCI overset("base")rarr CH_(3)CH_(2)CH(OCOCH_(3))CH(CH_(3))_(2)+HCI` In the above reaction, if the reactant a

Last Answer : `CH_(3)CH_(2)CH(OH)CH(CH_(3))_(2)+CH_(3)COCI overset("base")rarr CH_(3)CH_(2) ... the same configuration at the chiral atom D. be optically inactive

What is the trade name of H-COOH ?

Description : What is the trade name of H-COOH ?

Last Answer : H-COOH 's trade name is formic acid.

Mercaptans is represented as (where R and R' are alkyl groups) (A) R-COOH (B) R-S-H (C) R-S-R (D) R-S-R'

Description : Mercaptans is represented as (where R and R' are alkyl groups) (A) R-COOH (B) R-S-H (C) R-S-R (D) R-S-R'

Last Answer : (B) R-S-H

Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid ar

Description : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid ar

Last Answer : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history ... . D. Optically inactive due to intramoleuclar hydrogen bonding.

Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid ar

Description : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid ar

Last Answer : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two ... form Q is A. B. C. D. none of these

Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid ar

Description : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid ar

Last Answer : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history ... . D. Optically inactive due to intramoleuclar hydrogen bonding.

Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid ar

Description : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two naturally occuring forms of tartaric acid ar

Last Answer : Tartaric acid `[HO_(2)CCH(OH)CH(OH)CO_(2)H]` was an important compound in history of stereochemistry. Two ... form Q is A. B. C. D. none of these

For the chemical reaction X → Y, it is observed that, on doubling the concentration of 'X', the reaction rate quadruples. If the reaction rate is proportional to Cx n , then what is the value of ‘n’? (A) 1/4 (B) 2 (C) 4 (D) 16

Description : For the chemical reaction X → Y, it is observed that, on doubling the concentration of 'X', the reaction rate quadruples. If the reaction rate is proportional to Cx n , then what is the value of ‘n’? (A) 1/4 (B) 2 (C) 4 (D) 16

Last Answer : (C) 4

For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of 'P' is doubled. If the reaction rate is proportional to Cp n , then what is the value of 'n' for this chemical reaction? (A) 0 (B) 1 (C) 2 (D) 3

Description : For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of 'P' is doubled. If the reaction rate is proportional to Cp n , then what is the value of 'n' for this chemical reaction? (A) 0 (B) 1 (C) 2 (D) 3

Last Answer : (B) 1

What is the value of 'n' if the reaction rate of the chemical reaction A → B, is proportional to CA n and it is found that the reaction rate triples, when the concentration of 'A' is increased 9 times? (A) 1/2 (B) 1/3 (C) 1/9 (D) 3

Description : What is the value of 'n' if the reaction rate of the chemical reaction A → B, is proportional to CA n and it is found that the reaction rate triples, when the concentration of 'A' is increased 9 times? (A) 1/2 (B) 1/3 (C) 1/9 (D) 3

Last Answer : (A) 1/2

The rate of the chemical reaction A → B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CA n , then what is the value of n for this reaction? (A) 0 (B) 0.5 (C) 1 (D) 2

Description : The rate of the chemical reaction A → B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CA n , then what is the value of n for this reaction? (A) 0 (B) 0.5 (C) 1 (D) 2

Last Answer : (C) 1

The value of 'n' for a chemical reaction A → B, whose reaction rate is → CA n , will be __________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled. (A) 0 (B) 1 (C) 2 (D) 3

Description : The value of 'n' for a chemical reaction A → B, whose reaction rate is → CA n , will be __________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled. (A) 0 (B) 1 (C) 2 (D) 3

Last Answer : (D) 3

In purine biosynthesis carbon atoms at 4 and 5 position and N at 7 position are contributed by (A) Glycine (B) Glutamine (C) Alanine (D) Threonine

Description : In purine biosynthesis carbon atoms at 4 and 5 position and N at 7 position are contributed by (A) Glycine (B) Glutamine (C) Alanine (D) Threonine

Last Answer : Answer : A

Lipids are insoluble in water because lipid molecules are (a) hydrophilic (b) hydrophobic (c) neutral (d) zwitter ions.

Description : Lipids are insoluble in water because lipid molecules are (a) hydrophilic (b) hydrophobic (c) neutral (d) zwitter ions.

Last Answer : (b) hydrophobic

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

The N–H bond in the ammonium ion, NH4+, is formed by the overlap of what two orbitals? (a) sp3–sp3 (b) sp3–sp2 (c) sp2–sp2 (d) sp3–s

Description : The N–H bond in the ammonium ion, NH4+, is formed by the overlap of what two orbitals? (a) sp3–sp3 (b) sp3–sp2 (c) sp2–sp2 (d) sp3–s

Last Answer : sp3–s

The following reaction is characteristic of what type of enzymes? 2H2O2 → 2H2O + O2 (A) Peroxides (B) Catalase (C) Dehydrogenase (D) Copper containing oxidases

Description : The following reaction is characteristic of what type of enzymes? 2H2O2 → 2H2O + O2 (A) Peroxides (B) Catalase (C) Dehydrogenase (D) Copper containing oxidases

Last Answer : Answer : B

The pathway of glycogen biosynthesis involves a special nucleotide of glucose. In the reaction below, NuDP stands for NuDP Glucose + glycogenn → NuDP + glycogenn+1 (A) ADP (B) GDP (C) UDP (D) CDP

Description : The pathway of glycogen biosynthesis involves a special nucleotide of glucose. In the reaction below, NuDP stands for NuDP Glucose + glycogenn → NuDP + glycogenn+1 (A) ADP (B) GDP (C) UDP (D) CDP

Last Answer : Answer : C

In the reaction below, Nu TP stands for NuTP + glucose → Glucose 6–Phosphate + NuDP. (A) ATP (B) CTP (C) GTP (D) UTP

Description : In the reaction below, Nu TP stands for NuTP + glucose → Glucose 6–Phosphate + NuDP. (A) ATP (B) CTP (C) GTP (D) UTP

Last Answer : Answer : A

The total active earth pressure due to dry back fill with no surcharge, acts at H/3 above the base of the wall and is directly proportional to (A) H (B) H (C) H 2 (D) H 3

Description : The total active earth pressure due to dry back fill with no surcharge, acts at H/3 above the base of the wall and is directly proportional to (A) H (B) H (C) H 2 (D) H 3

Last Answer : (C) H

Back fill with a sloping surface exerts a total active pressure Pa on the wall of height H and acts at (A) H/4 above the base parallel to base (B) H/2 above the base parallel to base (C) H/3 above the base parallel to base (D) H/5 above the base parallel to base

Description : Back fill with a sloping surface exerts a total active pressure Pa on the wall of height H and acts at (A) H/4 above the base parallel to base (B) H/2 above the base parallel to base (C) H/3 above the base parallel to base (D) H/5 above the base parallel to base

Last Answer : Answer: Option C

Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of (A) h/4 (B) h/3 (C) h/2 (D) 2h/3

Description : Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of (A) h/4 (B) h/3 (C) h/2 (D) 2h/3

Last Answer : Answer: Option B

Hydrodynamic pressure due to earthquake acts at a height of (A) 3H/4 above the base (B) 3H/4 below the water surface (C) 4H/3 above the base (D) 4H below the water surface, where H is the depth of water.

Description : Hydrodynamic pressure due to earthquake acts at a height of (A) 3H/4 above the base (B) 3H/4 below the water surface (C) 4H/3 above the base (D) 4H below the water surface, where H is the depth of water.

Last Answer : Answer: Option C

What is the difference between a CEO, COO, and CFO?

Description : What is the difference between a CEO, COO, and CFO?

Last Answer : answer:Hi occ! I am guessing you want to know what it is they typically do. First, let's get the terms down. CEO is the Chief Executive Officer. Their responsibilities ... Exchange Commission). CTO is the Chief Technology Officer. Responsible for developing and implementing technology strategy.

how to clean coo-coo clock chains

Description : how to clean coo-coo clock chains

Last Answer : Remove the chains from the clock. Put them in a container with warm water and any grease cutting agent. Dish soap is good. Let them set to loosen the oils and dust. Use a soft toothbrush too clean stuck on spots of residue.

How does a chief executive office differ from a coo?

Description : How does a chief executive office differ from a coo?

Last Answer : A COO is a chief operating officer. They both are part of the higher rungs of a business. They COO can report to the chief executive officer. Sometimes people refer to the chief executive officer as the president of a company.

What is the molar mass of : (a) lead acetate, Pb(CH3 COO)2?

Description : What is the molar mass of : (a) lead acetate, Pb(CH3 COO)2?

Last Answer : also known as lead acetate, lead diacetate, plumbous acetate, sugar of lead, lead sugar, salt of Saturn, or Goulard's powder, is a white crystalline chemical compound with a sweet taste. It is made by treating lead(II) oxide with acetic acid.