The synthesis of fatty acids is often termed reductive synthesis. (A) NADP+ (B) NADH (C) FADH2 (D) NADPH

The synthesis of fatty acids is often termed reductive synthesis. (A) NADP+ (B) NADH (C) FADH2 (D) NADPH
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Which of the following is required as a reductant in fatty acid synthesis? (A) NADH (B) NADPH (C) FADH2 (D) FMNH2

Description : Which of the following is required as a reductant in fatty acid synthesis? (A) NADH (B) NADPH (C) FADH2 (D) FMNH2

Last Answer : Answer : B

In β-Oxidation of fatty acids, which of the following are utilized as coenzymes? (A) NAD+ and NADP+ (B) FADH2 and NADH + H+ (C) FAD and FMN (D) FAD and NAD+

Description : In β-Oxidation of fatty acids, which of the following are utilized as coenzymes? (A) NAD+ and NADP+ (B) FADH2 and NADH + H+ (C) FAD and FMN (D) FAD and NAD+

Last Answer : Answer : D

Thyroproxidase requires hydrogen peroxide as oxidizing agent. The H2O2 is produced by (A) FADH2 dependent enzyme (B) NADH dependent enzyme (C) NADP dependent enzyme (D) NADPH dependent enzyme

Description : Thyroproxidase requires hydrogen peroxide as oxidizing agent. The H2O2 is produced by (A) FADH2 dependent enzyme (B) NADH dependent enzyme (C) NADP dependent enzyme (D) NADPH dependent enzyme

Last Answer : Answer : D

The following coenzyme is required for catabolism of pyrimidine bases: (A) NADH (B) NADPH (C) FADH2 (D) None of these

Description : The following coenzyme is required for catabolism of pyrimidine bases: (A) NADH (B) NADPH (C) FADH2 (D) None of these

Last Answer : Answer : B

Conversion of retinal into ritonal requires the presence of (A) NADH (B) NADPH (C) FADH2 (D) Lipoic acid

Description : Conversion of retinal into ritonal requires the presence of (A) NADH (B) NADPH (C) FADH2 (D) Lipoic acid

Last Answer : Answer : B

Conversion of folate into tetrahydrofolate requires (A) NADH (B) NADPH (C) FMNH2 (D) FADH2

Description : Conversion of folate into tetrahydrofolate requires (A) NADH (B) NADPH (C) FMNH2 (D) FADH2

Last Answer : Answer : B

In β−oxidation of fatty acids which of the following are utilized as co-enzymes? (A) NAD+ and NADP+ (B) FAD H2 and NADH + H+ (C) FAD and FMN (D) FAD and NAD+

Description : In β−oxidation of fatty acids which of the following are utilized as co-enzymes? (A) NAD+ and NADP+ (B) FAD H2 and NADH + H+ (C) FAD and FMN (D) FAD and NAD+

Last Answer : Answer : D

Retinal is reduced to retinol by retinene reductase in presence of the coenzyme (A) NAD+ (B) NADP+ (C) NADH + H+ (D) NADPH + H+

Description : Retinal is reduced to retinol by retinene reductase in presence of the coenzyme (A) NAD+ (B) NADP+ (C) NADH + H+ (D) NADPH + H+

Last Answer : Answer : C

Conversion of all-trans-retinal into alltrans-retinol requires (A) NAD (B) NADH (C) NADP (D) NADPH

Description : Conversion of all-trans-retinal into alltrans-retinol requires (A) NAD (B) NADH (C) NADP (D) NADPH

Last Answer : Answer : D

Retinol and retinal are interconverted requiring dehydrogenase or reductase in the presence of (A) NAD or NADP (B) NADH + H+ (C) NADPH (D) FAD

Description : Retinol and retinal are interconverted requiring dehydrogenase or reductase in the presence of (A) NAD or NADP (B) NADH + H+ (C) NADPH (D) FAD

Last Answer : Answer : A

How do NADP+ and NADPH differ from NAD+ and NADH?

Description : How do NADP+ and NADPH differ from NAD+ and NADH?

Last Answer : These pairs of molecules are identical except for the presence of a phosphate group at the 2′ position on the ribose moiety. This is not a high-energy phosphate but rather a molecular tag that ... of fuels, while simultaneously the NADPH to NADP+ ratio can be very high, facilitating biosynthesis.  

Pentose phosphate pathway is of significance because it generates (A) NADPH for reductive synthesis (B) Regenerates glucose 6-phosphate (C) Generates fructose 6-phosphate (D) Forms glyceraldehyde 3-phosphate

Description : Pentose phosphate pathway is of significance because it generates (A) NADPH for reductive synthesis (B) Regenerates glucose 6-phosphate (C) Generates fructose 6-phosphate (D) Forms glyceraldehyde 3-phosphate

Last Answer : Answer : A

Apart from reductive synthesis, NADPH is used for what purpose?

Description : Apart from reductive synthesis, NADPH is used for what purpose?

Last Answer : It is necessary to keep the integrity of RBC membrane, it is needed for keeping glutathione in reduced state, it is required for keeping transparency of lens, it is necessary for superoxide production inside macrophages.

A soluble system for synthesis of fatty acids have been isolated from avian liver, required for the formation of long chain fatty acids by this system is (A) ATP (B) Acetyl CoA (C) NADPH (D) All of these

Description : A soluble system for synthesis of fatty acids have been isolated from avian liver, required for the formation of long chain fatty acids by this system is (A) ATP (B) Acetyl CoA (C) NADPH (D) All of these

Last Answer : Answer : D

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

De novo synthesis of fatty acids requires all of the following except (A) Biotin (B) NADH (C) Panthothenic acid (D) ATP

Description : De novo synthesis of fatty acids requires all of the following except (A) Biotin (B) NADH (C) Panthothenic acid (D) ATP

Last Answer : Answer : D

Synthesis of sphingosine requires the cofactor (A) NAD (B) NADP (C) NADPH+ (D) ATP

Description : Synthesis of sphingosine requires the cofactor (A) NAD (B) NADP (C) NADPH+ (D) ATP

Last Answer : Answer : C

What reductive biosynthesis pathways need NADPH?

Description : What reductive biosynthesis pathways need NADPH?

Last Answer : Fatty acid biosynthesis, synthesis of cholesterol, steroid hormones.

Oxidative degradation of acetyl CoA in the citric acid cycle gives a net yield of all the following except (A) FADH2 (B) 3 NADH (C) 2 ATP (D) 2CO2

Description : Oxidative degradation of acetyl CoA in the citric acid cycle gives a net yield of all the following except (A) FADH2 (B) 3 NADH (C) 2 ATP (D) 2CO2

Last Answer : Answer : C

Excessive intake of ethanol increases the ratio: (A) NADH : NAD+ (B) NAD+ : NADH (C) FADH2 : FAD (D) FAD : FADH2

Description : Excessive intake of ethanol increases the ratio: (A) NADH : NAD+ (B) NAD+ : NADH (C) FADH2 : FAD (D) FAD : FADH2

Last Answer : A

A pathway that requires NADPH as a cofactor is (A) Fatty acid oxidation (B) Extra mitochondrial denovo fatty acid synthesis (C) Ketone bodies formation (D) Glycogenesis

Description : A pathway that requires NADPH as a cofactor is (A) Fatty acid oxidation (B) Extra mitochondrial denovo fatty acid synthesis (C) Ketone bodies formation (D) Glycogenesis

Last Answer : Answer : B

NADPH required for fatty acid synthesis can come from (A) Hexose monophosphate shunt (B) Oxidative decarboxylation of malate (C) Extramitochondrial oxidation of isocitrate (D) All of these

Description : NADPH required for fatty acid synthesis can come from (A) Hexose monophosphate shunt (B) Oxidative decarboxylation of malate (C) Extramitochondrial oxidation of isocitrate (D) All of these

Last Answer : Answer : D

What are the sources of NADPH for fatty acid synthesis?

Description : What are the sources of NADPH for fatty acid synthesis?

Last Answer : Glucose-6-phosphate dehydrogenase, malic enzyme, cytoplasmic malate dehydrogenase.

What are the steps in which NADPH is used in fatty acid synthesis?

Description : What are the steps in which NADPH is used in fatty acid synthesis?

Last Answer : Step 4 (Keto acyl reductase) and Step 6 (Enoyl reductase).

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

Fatty acid synthesis takes place in the presence of the coenzyme: (A) NAD+ (B) Reduced NAD (C) NADP+ (D) Reduced NADP

Description : Fatty acid synthesis takes place in the presence of the coenzyme: (A) NAD+ (B) Reduced NAD (C) NADP+ (D) Reduced NADP

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

Fatty acids are activated to acyl CoA by the enzyme thiokinase: (A) NAD+ (B) NADP+ (C) CoA (D) FAD+

Description : Fatty acids are activated to acyl CoA by the enzyme thiokinase: (A) NAD+ (B) NADP+ (C) CoA (D) FAD+

Last Answer : Answer : C

β-Oxidation of fatty acids requires all the following coenzymes except (A) CoA (B) FAD (C) NAD (D) NADP

Description : β-Oxidation of fatty acids requires all the following coenzymes except (A) CoA (B) FAD (C) NAD (D) NADP

Last Answer : Answer : D

Pantothenic acid acts on (A) NADP (B) NADPH (C) FAD (D) CoA

Description : Pantothenic acid acts on (A) NADP (B) NADPH (C) FAD (D) CoA

Last Answer : Answer : B

For reduction enzyme HMG-CoA reductase requires cofactor: (A) NADPH (B) NADP (C) NAD (D) FAD

Description : For reduction enzyme HMG-CoA reductase requires cofactor: (A) NADPH (B) NADP (C) NAD (D) FAD

Last Answer : Answer : A

Retinal is reduced to retinol in intestinal mucosa by a specific retinaldehyde reductase utilising (A) NADPH + H+ (B) FAD (C) NAD (D) NADH + H+

Description : Retinal is reduced to retinol in intestinal mucosa by a specific retinaldehyde reductase utilising (A) NADPH + H+ (B) FAD (C) NAD (D) NADH + H+

Last Answer : Answer : A

Reduced glutathione functions in R.B.Cs to (A) Produce NADPH (B) Reduce methemoglobin to hemoglobin (C) Produce NADH (D) Reduce oxidizing agents such as H2O2

Description : Reduced glutathione functions in R.B.Cs to (A) Produce NADPH (B) Reduce methemoglobin to hemoglobin (C) Produce NADH (D) Reduce oxidizing agents such as H2O2

Last Answer : D

Two important byproducts of HMP shunt are (A) NADH and pentose sugars (B) NADPH and pentose sugars (C) Pentose sugars and 4 membered sugars (D) Pentose sugars and sedoheptulose

Description : Two important byproducts of HMP shunt are (A) NADH and pentose sugars (B) NADPH and pentose sugars (C) Pentose sugars and 4 membered sugars (D) Pentose sugars and sedoheptulose

Last Answer : B

DNA ligase of E. coli requires which of the following co-factors? (A) FAD (B) NAD+ (C) NADP+ (D) NADH

Description : DNA ligase of E. coli requires which of the following co-factors? (A) FAD (B) NAD+ (C) NADP+ (D) NADH

Last Answer : Answer : B

The light generated reducing power is (A) ATP (B) NADPH2 (C) FADH2 (D) NADH 2

Description : The light generated reducing power is (A) ATP (B) NADPH2 (C) FADH2 (D) NADH 2

Last Answer : (B) NADPH2

Out of 38 ATP molecules produced per glucose, 32 ATP molecules are formed from NADH/FADH2 in (a) respiratory chain (b) Krebs’ cycle (c) oxidative decarboxylation (d) EMP.

Description : Out of 38 ATP molecules produced per glucose, 32 ATP molecules are formed from NADH/FADH2 in (a) respiratory chain (b) Krebs’ cycle (c) oxidative decarboxylation (d) EMP.

Last Answer : (a) respiratory chain

The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products. PathwayA Pathway B 6 Pathway C 11 2 Glucose 1 5 10 12 7 4 8 3 Arrows numbered 4, 8 and 12 can all be (a) H2O (b) FAD+ or FADH2 (c) NADH (d) ATP.

Description : The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products. PathwayA Pathway B 6 Pathway C 11 2 Glucose 1 5 10 12 7 4 8 3 Arrows numbered 4, 8 and 12 can all be (a) H2O (b) FAD+ or FADH2 (c) NADH (d) ATP.

Last Answer : (d) ATP.

Which statement is wrong for Krebs’ cycle? (a) There is one point in the cycle where FAD+ is reduced to FADH2. (b) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised. (c) The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid. (d) There are three points in the cycle where NAD+ is reduced to NADH + H+.

Description : Which statement is wrong for Krebs' cycle? (a) There is one point in the cycle where FAD+ is reduced to FADH2. (b) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised. (c ... citric acid. (d) There are three points in the cycle where NAD+ is reduced to NADH + H+.

Last Answer : (c) The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid.

Name the given reaction and enzyme involved in it. `alpha`-etoglutaric acid `+NH_(4)^(+)+NADPH overset("Enzyme")to"glutamate"+H_(2)O+NADP`

Description : Name the given reaction and enzyme involved in it. `alpha`-etoglutaric acid `+NH_(4)^(+)+NADPH overset("Enzyme")to"glutamate"+H_(2)O+NADP`

Last Answer : Name the given reaction and enzyme involved in it. `alpha`-etoglutaric acid `+NH_(4)^(+)+NADPH overset("Enzyme")to"glutamate"+H_(2)O+NADP`

During cyclic phosphorylation NADP is formed or not. a. No NADP formation b. No NADP utilization c. NADP is converted into NADPH d. All are correct

Description : During cyclic phosphorylation NADP is formed or not. a. No NADP formation b. No NADP utilization c. NADP is converted into NADPH d. All are correct

Last Answer : Ans: A

NADP+ is reduced to NADPH in (a) HMP (b) Calvin Cycle (c) glycolysis (d) EMP.

Description : NADP+ is reduced to NADPH in (a) HMP (b) Calvin Cycle (c) glycolysis (d) EMP.

Last Answer : (a) HMP

NADP+ is reduced to NADPH in (a) PS I (b) PS II (c) Calvin cycle (d) noncyclic photophosphorylation.

Description : NADP+ is reduced to NADPH in (a) PS I (b) PS II (c) Calvin cycle (d) noncyclic photophosphorylation.

Last Answer : (d) noncyclic photophosphorylation.

Oxidative phosphorylation is production of (a) ATP in photosynthesis (b) NADPH in photosynthesis (c) ATP in respiration (d) NADH in respiration

Description : Oxidative phosphorylation is production of (a) ATP in photosynthesis (b) NADPH in photosynthesis (c) ATP in respiration (d) NADH in respiration

Last Answer : (c) ATP in respiration

Which of the following is not a product of light reaction of photosynthesis? (a) ATP (b) NADH (c) NADPH (d) Oxygen

Description : Which of the following is not a product of light reaction of photosynthesis? (a) ATP (b) NADH (c) NADPH (d) Oxygen

Last Answer : b) NADH

Which of the following is not a product of light reaction of photosynthesis ? (1) ATP (2) NADH (3) NADPH (4) Oxygen

Description : Which of the following is not a product of light reaction of photosynthesis ? (1) ATP (2) NADH (3) NADPH (4) Oxygen

Last Answer : (2) NADH

Synthesis of Glucose from amino acids is termed as (A) Glycolysis (B) Gluconeogenesis (C) Glycogenesis (D) Lipogenesis

Description : Synthesis of Glucose from amino acids is termed as (A) Glycolysis (B) Gluconeogenesis (C) Glycogenesis (D) Lipogenesis

Last Answer : B

Epinephrine increases the concentration of free fatty acids in plasma by increasing (A) Extramitochondrial fatty acid synthesis (B) Mitochondrial fatty acid chain elongation (C) Microsomal fatty acid chain elongation (D) Lipolysis in adipose tissue

Description : Epinephrine increases the concentration of free fatty acids in plasma by increasing (A) Extramitochondrial fatty acid synthesis (B) Mitochondrial fatty acid chain elongation (C) Microsomal fatty acid chain elongation (D) Lipolysis in adipose tissue

Last Answer : Answer : D

All the following statements about acetyl CoA carboxylase are true except (A) It is required for de novo synthesis of fatty acids (B) It is required for mitochondrial elongation of fatty acids (C) It is required for microsomal elongation of fatty acids (D) Insulin converts its inactive form into its active form

Description : All the following statements about acetyl CoA carboxylase are true except (A) It is required for de novo synthesis of fatty acids (B) It is required for mitochondrial elongation of fatty acids ( ... for microsomal elongation of fatty acids (D) Insulin converts its inactive form into its active form

Last Answer : Answer : B

Formation of acetyl CoA from pyruvate for de novo synthesis of fatty acids requires (A) Pyruvate dehydrogenase complex (B) Citrate synthetase (C) ATP citrate lyase (D) All of these

Description : Formation of acetyl CoA from pyruvate for de novo synthesis of fatty acids requires (A) Pyruvate dehydrogenase complex (B) Citrate synthetase (C) ATP citrate lyase (D) All of these

Last Answer : Answer : D