Malonyl-CoA reacts with the central (A) —SH group (B) —NH2 group (C) —COOH group (D) —CH2OH group

Malonyl-CoA reacts with the central (A) —SH group (B) —NH2 group (C) —COOH group (D) —CH2OH group
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What is the functional group in an alcohol? (a) Carbon-carbon double bond (b) NH2 (c) OH (d) COOH

Description : What is the functional group in an alcohol? (a) Carbon-carbon double bond (b) NH2 (c) OH (d) COOH

Last Answer : OH

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

Insulin regulates fatty acid synthesis by (A) Dephosphorylating of acetyl CoA carboxylase (B) Activating phosphorylase (C) Inhibiting malonyl CoA formation (D) Controlling carnitine-Acyl CoA transferase activity

Description : Insulin regulates fatty acid synthesis by (A) Dephosphorylating of acetyl CoA carboxylase (B) Activating phosphorylase (C) Inhibiting malonyl CoA formation (D) Controlling carnitine-Acyl CoA transferase activity

Last Answer : Answer : A

Which one of the following cofactors must be utilized during the conversion of acetyl CoA to malonyl CoA? (A) TPP (B) ACP (C) NAD+ (D) Biotin

Description : Which one of the following cofactors must be utilized during the conversion of acetyl CoA to malonyl CoA? (A) TPP (B) ACP (C) NAD+ (D) Biotin

Last Answer : Answer : D

β-oxidation of fatty acids is inhibited by (A) NADPH (B) Acetyl CoA (C) Malonyl CoA (D) None of these

Description : β-oxidation of fatty acids is inhibited by (A) NADPH (B) Acetyl CoA (C) Malonyl CoA (D) None of these

Last Answer : Answer : C

Ceramide is formed by the combination of sphingosine and (A) Acetyl-CoA (B) Acyl-CoA (C) Malonyl-CoA (D) Propionyl-CoA

Description : Ceramide is formed by the combination of sphingosine and (A) Acetyl-CoA (B) Acyl-CoA (C) Malonyl-CoA (D) Propionyl-CoA

Last Answer : Answer : B

A cofactor required for the conversion of acetyl-CoA to malonyl-CoA in extramitochondrial fatty acid synthesis is (A) Biotin (B) FMN (C) NAD (D) NADP

Description : A cofactor required for the conversion of acetyl-CoA to malonyl-CoA in extramitochondrial fatty acid synthesis is (A) Biotin (B) FMN (C) NAD (D) NADP

Last Answer : Answer : A

Conversion of fatty acyl-CoA to an acylCoA derivative having 2 more carbon atoms involves as acetyl donar: (A) Acetyl-CoA (B) Succinyl-CoA (C) Propionyl-CoA (D) Malonyl-CoA

Description : Conversion of fatty acyl-CoA to an acylCoA derivative having 2 more carbon atoms involves as acetyl donar: (A) Acetyl-CoA (B) Succinyl-CoA (C) Propionyl-CoA (D) Malonyl-CoA

Last Answer : Answer : D

In extra hepatic tissues, one mechanism for utilization of acetoacetate involves (A) Malonyl-CoA (B) Succinyl-CoA (C) Propionyl-CoA (D) Acetyl-CoA

Description : In extra hepatic tissues, one mechanism for utilization of acetoacetate involves (A) Malonyl-CoA (B) Succinyl-CoA (C) Propionyl-CoA (D) Acetyl-CoA

Last Answer : Answer : B

The starting material for ketogenesis is (A) Acyl-CoA (B) Acetyl-CoA (C) Acetoacetyl-CoA (D) Malonyl-CoA

Description : The starting material for ketogenesis is (A) Acyl-CoA (B) Acetyl-CoA (C) Acetoacetyl-CoA (D) Malonyl-CoA

Last Answer : Answer : C

Fatty acids with odd number of carbon atoms yield acetyl-CoA and a molecule of (A) Succinyl-CoA (B) Propionyl-CoA (C) Malonyl-CoA (D) Acetoacetyl-CoA

Description : Fatty acids with odd number of carbon atoms yield acetyl-CoA and a molecule of (A) Succinyl-CoA (B) Propionyl-CoA (C) Malonyl-CoA (D) Acetoacetyl-CoA

Last Answer : Answer : B

β-Oxidation of odd-carbon fatty acid chain produces (A) Succinyl CoA (B) Propionyl CoA (C) Acetyl CoA (D) Malonyl CoA

Description : β-Oxidation of odd-carbon fatty acid chain produces (A) Succinyl CoA (B) Propionyl CoA (C) Acetyl CoA (D) Malonyl CoA

Last Answer : Answer : D

Which of the following cofactors or their derivatives must be present for the conversion of acetyl CoA to malonyl CoA extramitochondrial fatty acid synthesis? (A) Biotin (B) FAD (C) FMN (D) ACP

Description : Which of the following cofactors or their derivatives must be present for the conversion of acetyl CoA to malonyl CoA extramitochondrial fatty acid synthesis? (A) Biotin (B) FAD (C) FMN (D) ACP

Last Answer : Answer : A

While citrate is converted to isocitrate in the mitochondria, it is converted to _______ in the cytosol. (A) Acetyl CoA + oxaloacetate (B) Acetyl CoA + malonyl CoA (C) Acetyl CoA + Pyruvate (D) Acetyl CoA + acetoacetyl CoA

Description : While citrate is converted to isocitrate in the mitochondria, it is converted to _______ in the cytosol. (A) Acetyl CoA + oxaloacetate (B) Acetyl CoA + malonyl CoA (C) Acetyl CoA + Pyruvate (D) Acetyl CoA + acetoacetyl CoA

Last Answer : Answer : A

In the extra mitochondrial synthesis of fatty acids, CO2 is utilized (A) To keep the system anaerobic and prevent regeneration of acetyl CoA (B) In the conversion of malonyl to CoA hydroxybutyryl CoA (C) In the conversion of acetyl CoA to malonyl CoA (D) In the formation of acetyl CoA from 1 carbon intermediates

Description : In the extra mitochondrial synthesis of fatty acids, CO2 is utilized (A) To keep the system anaerobic and prevent regeneration of acetyl CoA (B) In the conversion of malonyl to CoA hydroxybutyryl CoA (C ... of acetyl CoA to malonyl CoA (D) In the formation of acetyl CoA from 1 carbon intermediates

Last Answer : Answer : C

Carboxylation of acetyl—CoA to malonyl — CoA takes place in presence of (A) FAD+ (B) Biotin (C) NAD+ (D) NADP+

Description : Carboxylation of acetyl—CoA to malonyl — CoA takes place in presence of (A) FAD+ (B) Biotin (C) NAD+ (D) NADP+

Last Answer : Answer : C

De novo synthesis and oxidation of fatty acids differ in the following respect: (A) Synthesis occurs in cytosol and oxidation in mitochondria (B) Synthesis is decreased and oxidation increased by insulin (C) NADH is required in synthesis and FAD in oxidation (D) Malonyl CoA is formed during oxidation but not during synthesis

Description : De novo synthesis and oxidation of fatty acids differ in the following respect: (A) Synthesis occurs in cytosol and oxidation in mitochondria (B) Synthesis is decreased and oxidation increased by ... synthesis and FAD in oxidation (D) Malonyl CoA is formed during oxidation but not during synthesis

Last Answer : Answer : A

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.

Which co-enzyme is not involved in oxidative decarboxylation of pyruvic acid? (A) TPP (B) Mg++ (C) Biotin (D) CoA-SH

Description : Which co-enzyme is not involved in oxidative decarboxylation of pyruvic acid? (A) TPP (B) Mg++ (C) Biotin (D) CoA-SH

Last Answer : Answer : C

The active site of an enzyme is formed by (A) R group of amino acids (B) NH2 group of amino acids (C) CO group of amino acids (D) Sulphur bonds which are exposed

Description : The active site of an enzyme is formed by (A) R group of amino acids (B) NH2 group of amino acids (C) CO group of amino acids (D) Sulphur bonds which are exposed

Last Answer : Answer : A

Biuret reaction is specific for (A) –CONH-linkages (B) –CSNH2 group (C) –(NH)NH2 group (D) All of these

Description : Biuret reaction is specific for (A) –CONH-linkages (B) –CSNH2 group (C) –(NH)NH2 group (D) All of these

Last Answer : Answer : A

An organic compound A,`C_(5)H_(8)O` reacts with `H_(2)O, NH_(3)` and `CH_(3)COOH` as described below A is

Description : An organic compound A,`C_(5)H_(8)O` reacts with `H_(2)O, NH_(3)` and `CH_(3)COOH` as described below A is

Last Answer : An organic compound A,`C_(5)H_(8)O` reacts with `H_(2)O, NH_(3)` and `CH_(3)COOH` as described ... 2))underset(||)(C)-underset(H)underset(|)(C)=O`

One functional sub-unit of multi-enzyme complex for de novo synthesis of fatty acids contains (A) One —SH group (B) Two —SH groups (C) Three —SH groups (D) Four —SH groups FATS AND FATTY ACID METABOLISM 87

Description : One functional sub-unit of multi-enzyme complex for de novo synthesis of fatty acids contains (A) One —SH group (B) Two —SH groups (C) Three —SH groups (D) Four —SH groups FATS AND FATTY ACID METABOLISM 87

Last Answer : Answer : B

De novo synthesis of fatty acids is catalysed by a multi-enzyme complex which contains (A) One-SH group (B) Two-SH groups (C) Three-SH groups (D) Four-SH groups

Description : De novo synthesis of fatty acids is catalysed by a multi-enzyme complex which contains (A) One-SH group (B) Two-SH groups (C) Three-SH groups (D) Four-SH groups

Last Answer : Answer : D

Which of the following species contains three bond pairs and one lone pair around the central atom? (1) PCl3 (2) H2O (3) BF3 (4) NH2

Description : Which of the following species contains three bond pairs and one lone pair around the central atom? (1) PCl3 (2) H2O (3) BF3 (4) NH2

Last Answer : PCl3

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

Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom more available for protonation. (c) the presence of CH3 group sterically hinders the protonation of the NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.

Description : Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) ... NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.

Last Answer : the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation

The protein, which is in fact a multifunctional enzyme complex in higher organism is (A) Acetyl transacylase (B) Malonyl transacylase (C) 3-Hydroxy acyl-ACP dehyratase (D) Fatty acid synthase

Description : The protein, which is in fact a multifunctional enzyme complex in higher organism is (A) Acetyl transacylase (B) Malonyl transacylase (C) 3-Hydroxy acyl-ACP dehyratase (D) Fatty acid synthase

Last Answer : Answer : D

What is the significance of SH groups in pro- teins?

Description : What is the significance of SH groups in pro- teins?

Last Answer : The SH group of cysteine can form a disulfide (S- S) bond with another cysteine residue. The two cysteine residues can connect two polypeptide chains by the formation of interchain disulfide bonds.

The carboxyl functional group (-COOH) is present in

Description : The carboxyl functional group (-COOH) is present in

Last Answer : The carboxyl functional group (-COOH) is present in A. picric acid B. barbituric acid C. ascorbic acid D. aspirin

The organic compounds having the functional group COOH are called?

Description : The organic compounds having the functional group COOH are called?

Last Answer : Carboxylic acids

A poly-functional compound containing one – OH group and one – COOH group is

Description : A poly-functional compound containing one – OH group and one – COOH group is

Last Answer : Salicylic acid.

Compounds containing – COOH group as functional group are called

Description : Compounds containing – COOH group as functional group are called

Last Answer : Carboxylic acids.

A functional group designated—COOH is known as a/an a. Carboxyl. b. Carbonyl. c. Amino. d. Hydroxyl.

Description : A functional group designated—COOH is known as a/an a. Carboxyl. b. Carbonyl. c. Amino. d. Hydroxyl.

Last Answer : a. Carboxyl.

Group transferring Co-enzyme is (A) CoA (B) NAD+ (C) NADP+ (D) FAD+

Description : Group transferring Co-enzyme is (A) CoA (B) NAD+ (C) NADP+ (D) FAD+

Last Answer : Answer : A

An examp le of group transferr ing coenzyme is (A) NAD+ (B) NADP+ (C) FAD (D) CoA

Description : An examp le of group transferr ing coenzyme is (A) NAD+ (B) NADP+ (C) FAD (D) CoA

Last Answer : Answer : D

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

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

Description : 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

Last Answer : Answer : C

One round of Edman degradation of the peptide: H2N— Gly—Arg—Lys—Phe— Asp— COOH would result in which of the following structures or their phenyl isothiocyanate derivatives? (A) H2N—Gly—Arg—COOH + H2N—Lys— Phe— Asp—COOH (B) H2N—Gly—Arg—Lys—Phe—COOH + Asp (C) H2N—Arg—Lys—Phe—Asp—COOH + Gly (D) H2N—Gly—Arg—Lys—COOH + H2N—Phe —Asp—COOH

Description : One round of Edman degradation of the peptide: H2N- Gly-Arg-Lys-Phe- Asp- COOH would result in which of the following structures or their phenyl isothiocyanate derivatives? (A) H2N-Gly-Arg-COOH + H2N-Lys- Phe- Asp- ... C) H2N-Arg-Lys-Phe-Asp-COOH + Gly (D) H2N-Gly-Arg-Lys-COOH + H2N-Phe -Asp-COOH

Last Answer : Answer : C

Which national highway connects Delhi and Kolkata via Mathura and Varanasi? (1) NH4 (2) NH2 (3) NH10 (4) NH6

Description : Which national highway connects Delhi and Kolkata via Mathura and Varanasi? (1) NH4 (2) NH2 (3) NH10 (4) NH6

Last Answer : (2) NH2 Explanation: National Highway 2, commonly referred as Delhi-Kolkata Road, is a busy Indian National Highway that runs through the states of Delhi, Haryana, Uttar Pradesh, Bihar, Jharkhand, and West ... a major portion of the historical Grand Trunk Road along with NH 91 and NH 1 in India.

Although — NH2 gp is an ortho and para directing gp, nitration of aniline gives along with ortho and para, meta derivatives also.

Description : Although — NH2 gp is an ortho and para directing gp, nitration of aniline gives along with ortho and para, meta derivatives also.

Last Answer : Nitration is carried out with a mixture of Conc. NO3 + Conc. H2 SO4 (nitrating mix). In the presence of these acids, most of aniline gets protonated to form anilinium ion. Therefore, in the ... is m-directing and deactivating hence a mixture of all three-ortho, para and meta derivatives is formed.

The given diagrammatic OH OH HOCH O 2 “X” representation shows one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank component “X” in it. Category Component (a) Cholesterol Guanine (b) Amino acid NH2 (c) Nucleotide Adenine (d) Nucleoside Uracil

Description : The given diagrammatic OH OH HOCH O 2 X representation shows one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one ... Component (a) Cholesterol Guanine (b) Amino acid NH2 (c) Nucleotide Adenine (d) Nucleoside Uracil

Last Answer : (d) Nucleoside Uracil

Urea is represented as (A) NH2 .CO.NH2 (B) NH3CO.CH3 (C) NH.CO2 .NH (D) NH3 .CO2 .NH3

Description : Urea is represented as (A) NH2 .CO.NH2 (B) NH3CO.CH3 (C) NH.CO2 .NH (D) NH3 .CO2 .NH3

Last Answer : (A) NH2 .CO.NH2

. Chemical formula of biuret is (A) NH2 .CO.NH2 (B) NH3 .COO.NH3 (C) NH2CONHCONH2 (D) NH4COONH2

Description : . Chemical formula of biuret is (A) NH2 .CO.NH2 (B) NH3 .COO.NH3 (C) NH2CONHCONH2 (D) NH4COONH2

Last Answer : (C) NH2CONHCONH2

Which of the following substituents is an ortho and para director and ring deactivating? (a) –NH2 (b) –Cl (c) –OCH3 (d) –OH

Description : Which of the following substituents is an ortho and para director and ring deactivating? (a) –NH2 (b) –Cl (c) –OCH3 (d) –OH

Last Answer : –Cl

Digestion of proteins involves (a) changes in secondary structure only (b) cleavage of peptide linkages (c) removal of all carboxyl groups in the form of CO2. (d) removal of all NH2 groups in the form of NH3

Description : Digestion of proteins involves (a) changes in secondary structure only (b) cleavage of peptide linkages (c) removal of all carboxyl groups in the form of CO2. (d) removal of all NH2 groups in the form of NH3

Last Answer : cleavage of peptide linkages

The compound methylamine, H3C–NH2, contains a C–N bond. In this bond, which of the following best describes the charge on the nitrogen atom? (a) slightly positive (b) uncharged (c) slightly negative (d) –1

Description : The compound methylamine, H3C–NH2, contains a C–N bond. In this bond, which of the following best describes the charge on the nitrogen atom? (a) slightly positive (b) uncharged (c) slightly negative (d) –1

Last Answer : slightly negative

What is the conjugate base of CH3NH2? (a) CH3NH3+ (b) CH3NH– (c) NH4+ (d) NH2–

Description : What is the conjugate base of CH3NH2? (a) CH3NH3+ (b) CH3NH– (c) NH4+ (d) NH2–

Last Answer : CH3NH–

What is the conjugate acid of CH3NH2? (a) CH3NH3+ (b) CH3NH– (c) NH4+ (d) NH2–

Description : What is the conjugate acid of CH3NH2? (a) CH3NH3+ (b) CH3NH– (c) NH4+ (d) NH2–

Last Answer : CH3NH3+