Redox potential (EO volts) of NAD+/NADH is (A) –0.67 (B) –0.32 (C) –0.12 (D) +0.03

Redox potential (EO volts) of NAD+/NADH is (A) –0.67 (B) –0.32 (C) –0.12 (D) +0.03
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Redox potential (EO volts) of ubiquinone, ox/red system is (A) +0.03 (B) +0.08 (C) +0.10 (D) +0.29

Description : Redox potential (EO volts) of ubiquinone, ox/red system is (A) +0.03 (B) +0.08 (C) +0.10 (D) +0.29

Last Answer : Answer : C

Redox potential (EO volts) of cytochrome C, Fe3+/Fe2+ is (A) –0.29 (B) –0.27 (C) –0.08 (D) +0.22

Description : Redox potential (EO volts) of cytochrome C, Fe3+/Fe2+ is (A) –0.29 (B) –0.27 (C) –0.08 (D) +0.22

Last Answer : Answer : D

The oxidation-reduction system having the highest redox potential is (A) Ubiquinone ox/red (B) Fe3+ cytochrome a/Fe2+ (C) Fe3+ cytochrome b/Fe2+ (D) NAD+/NADH

Description : The oxidation-reduction system having the highest redox potential is (A) Ubiquinone ox/red (B) Fe3+ cytochrome a/Fe2+ (C) Fe3+ cytochrome b/Fe2+ (D) NAD+/NADH

Last Answer : Answer : B

The compound having the lowest redox potential amongst the following is (A) Hydrogen (B) NAD (C) Cytochrome b (D) Cytochrome a

Description : The compound having the lowest redox potential amongst the following is (A) Hydrogen (B) NAD (C) Cytochrome b (D) Cytochrome a

Last Answer : Answer : A

The sequence of the redox carrier in respiratory chain is (A) NAD—FMN—Q—cyt b—cyt c1—cyt c—cyt aa3 → O2 (B) FMN—Q—NAD—cyt b—cyt aa3—cyt c1— cyt c → O2 (C) NAD—FMN—Q—cyt c1—cyt c—cyt b—cyt aa3 → O2 (D) NAD—FMN—Q—cyt b—cyt aa3—cyt c—cyt c1 → O2

Description : The sequence of the redox carrier in respiratory chain is (A) NAD—FMN—Q—cyt b—cyt c1—cyt c—cyt aa3 → O2 (B) FMN—Q—NAD—cyt b—cyt aa3—cyt c1— cyt c → O2 (C) NAD—FMN—Q—cyt c1—cyt c—cyt b—cyt aa3 → O2 (D) NAD—FMN—Q—cyt b—cyt aa3—cyt c—cyt c1 → O2

Last Answer : Answer : A

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

In the biosynthesis of heme, condensation between succinyl CoA and glycine requires (A) NAD+ (B) FAD (C) NADH + H+ (D) B6-phosphate

Description : In the biosynthesis of heme, condensation between succinyl CoA and glycine requires (A) NAD+ (B) FAD (C) NADH + H+ (D) B6-phosphate

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

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

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

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

Compared to the resting state, vigorously contracting muscle shows (A) An increased conversion of pyruvate to lactate (B) Decreased oxidation of pyruvate of CO2 and water (C) A decreased NADH/NAD+ ratio (D) Decreased concentration of AMP CARBOHYDRATES AND CARBOHYDRATE METABOLISM 21

Description : Compared to the resting state, vigorously contracting muscle shows (A) An increased conversion of pyruvate to lactate (B) Decreased oxidation of pyruvate of CO2 and water (C) A decreased NADH/NAD+ ratio (D) Decreased concentration of AMP CARBOHYDRATES AND CARBOHYDRATE METABOLISM 21

Last Answer : A

Ethanol decreases gluconeogenesis by (A) Inhibiting glucose-6-phosphatase (B) Inhibiting PEP carboxykinase (C) Converting NAD+ into NADH and decreasing the availability of pyruvate (D) Converting NAD+ into NADH and decreasing the availability of lactate

Description : Ethanol decreases gluconeogenesis by (A) Inhibiting glucose-6-phosphatase (B) Inhibiting PEP carboxykinase (C) Converting NAD+ into NADH and decreasing the availability of pyruvate (D) Converting NAD+ into NADH and decreasing the availability of lactate

Last 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

As the end product of glycolysis, pyruvate and NADH are formed. During aerobic conditions, this NADH is reconverted to NAD+ by what mechanism?

Description : As the end product of glycolysis, pyruvate and NADH are formed. During aerobic conditions, this NADH is reconverted to NAD+ by what mechanism?

Last Answer : Oxygen.

As the end product of glycolysis, pyruvate and NADH are formed. During anaerobiasis, this NADH is reconverted to NAD+ by what mechanism?

Description : As the end product of glycolysis, pyruvate and NADH are formed. During anaerobiasis, this NADH is reconverted to NAD+ by what mechanism?

Last Answer : Lactate dehydrogenase reaction.

NADH is oxidised to NAD in which reaction of glycolysis?

Description : NADH is oxidised to NAD in which reaction of glycolysis?

Last Answer : Lactate dehydrogenase reaction.

NAD is reduced to NADH in which reaction of glycolysis?

Description : NAD is reduced to NADH in which reaction of glycolysis?

Last Answer : Glyceraldehyde-3-phosphate dehydrogenase reaction.

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.  

NADH is oxidised to `NAD^(+)` rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration

Description : NADH is oxidised to `NAD^(+)` rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration

Last Answer : NADH is oxidised to `NAD^(+)` rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration

Write the enzyme & its coenzymes which catalyse the following reaction:- Pyruvic acid `+NAD^(+)to"ACetylCoA"+CO_2+NADH`

Description : Write the enzyme & its coenzymes which catalyse the following reaction:- Pyruvic acid `+NAD^(+)to"ACetylCoA"+CO_2+NADH`

Last Answer : Write the enzyme & its coenzymes which catalyse the following reaction:- Pyruvic acid `+NAD^(+)to"ACetylCoA"+CO_2+NADH`

NADH is oxidised to `NAD^(+)` rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration

Description : NADH is oxidised to `NAD^(+)` rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration

Last Answer : NADH is oxidised to `NAD^(+)` rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration

Write the enzyme & its coenzymes which catalyse the following reaction:- Pyruvic acid `+NAD^(+)to"ACetylCoA"+CO_2+NADH`

Description : Write the enzyme & its coenzymes which catalyse the following reaction:- Pyruvic acid `+NAD^(+)to"ACetylCoA"+CO_2+NADH`

Last Answer : Write the enzyme & its coenzymes which catalyse the following reaction:- Pyruvic acid `+NAD^(+)to"ACetylCoA"+CO_2+NADH`

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.

If the more negative standard reduction potential of a redox pair, the greater the tendency to (A) To lose electrons (B) To gain electrons (C) To lose/gain electrons (D) To lose and gain electrons

Description : If the more negative standard reduction potential of a redox pair, the greater the tendency to (A) To lose electrons (B) To gain electrons (C) To lose/gain electrons (D) To lose and gain electrons

Last Answer : A

Calculate the electric field intensity of a line charge of length 2m and potential 24V. a) 24 b) 12 c) 0.083 d) 12.67

Description : Calculate the electric field intensity of a line charge of length 2m and potential 24V. a) 24 b) 12 c) 0.083 d) 12.67

Last Answer : b) 12

Two half-reactions of an electrochemical cell are given below : MnO–4 (aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e–, E° = + 0.15 V. Construct the redox equation from the standard potential of the cell and predict if the reaction is reactant favoured or product favoured. -Chemistry

Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e- ... the redox equation from the standard potential of the cell and predict if the reaction is reactant favoured or product favoured. -Chemistry

Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → = Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V At cathode (reduction) : MnO-4(aq) + 8H+ ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.

Two half-reactions of an electrochemical cell are given below : MnO–4 (aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + 2e–, E° = + 0.15 V. Construct the redox reaction equation from the two half-reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. -Chemistry

Description : Two half-reactions of an electrochemical cell are given below : MnO-4 (aq) + 8H+ (aq) + 5e- → Mn2+ (aq) + 4H2O (I), E° = 1.51 V Sn2+ (aq) → Sn4+ (aq) + ... -reactions and calculate the cell potential from the standard potentials and predict if the reaction is reactant or product favoured. -Chemistry

Last Answer : The reactions can be represented at anode and at cathode in the following ways : At anode (oxidation) : Sn2+ → Sn4+ (aq) + 2e- ] 5 E° = + 0.15 V Af cathode (reduction) : MnO-4(aq) + 8H+ ( ... = E°cathode - E°anode = 1.51 - 0.15 = + 1.36 V ∴ Positive value of E°cell favours formation of product.

Find the capacitance when charge is 20 C has a voltage of 1.2V. a) 32.67 b) 16.67 c) 6.67 d) 12.33

Description : Find the capacitance when charge is 20 C has a voltage of 1.2V. a) 32.67 b) 16.67 c) 6.67 d) 12.33

Last Answer : b) 16.67

The percentage of fluoride present in normal bone is (A) 0.01–0.03 (B) 0.04–0.08 (C) 0.10–0.12 (D) 0.15–0.2

Description : The percentage of fluoride present in normal bone is (A) 0.01–0.03 (B) 0.04–0.08 (C) 0.10–0.12 (D) 0.15–0.2

Last Answer : Answer : A

Eo that had a virus into a different video format, would the output video contain the virus too?

Description : Eo that had a virus into a different video format, would the output video contain the virus too?

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What power is consumed by a heating element using a current of 20 amperes at 120 volts? A. 20 watts B. 66.67 watts C. 720 watts D. 2400 watts

Description : What power is consumed by a heating element using a current of 20 amperes at 120 volts? A. 20 watts B. 66.67 watts C. 720 watts D. 2400 watts

Last Answer : Answer: D

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

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Which of the following is true in regard to smoking, A. Smokers keratosis is common but metaplasia activity is not recognised B. Redox potential is increased resulting in aerobic bacteria C. Tissue perfusion is decreased resulting in increased infection

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What is not true about tobacco smoking, A. Redox potential is reduced resulting in anaerobic bacteria B. It is immuno-suppressive C. It is adrenergic

Description : What is not true about tobacco smoking, A. Redox potential is reduced resulting in anaerobic bacteria B. It is immuno-suppressive C. It is adrenergic

Last Answer : B. It is immuno-suppressive

What is NOT true about tobacco smoking: A. Redox potential favours growth of anaerobic bacteria B. It is caries immuno-suppressive C. It is adrenergic D. Affects neutrophils and chemotactic factors

Description : What is NOT true about tobacco smoking: A. Redox potential favours growth of anaerobic bacteria B. It is caries immuno-suppressive C. It is adrenergic D. Affects neutrophils and chemotactic factors

Last Answer : B. It is caries immuno-suppressive

Which one of the following statements is not correct? A Since voltage depends on concentrations, using standard conditions makes it easier to compare different electrochemical reactions. B We have to measure the cell potential to obtain the difference in potential energy because the potential of half-reactions cannot be measured directly. C The direction of a redox reaction can only be determined experimentally. D Half-cell potentials for half-reactions are determined by combining the relevant half-cell with a standardised half-cell.

Description : Which one of the following statements is not correct? A Since voltage depends on concentrations, using standard conditions makes it easier to compare different electrochemical reactions. B We have ... half-reactions are determined by combining the relevant half-cell with a standardised half-cell.

Last Answer : C The direction of a redox reaction can only be determined experimentally. 

What is the width of Broad guage Railway line in India? A. 2 m B. 1.67 m C. 1.32 m D. 1 m

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Assuming that the disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O block requests are 98, 37, 14, 124, 65, 67: (A) 310 (B) 324 (C) 320 (D) 321

Description : Assuming that the disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O block requests are 98, 37, 14, 124, 65, 67: (A) 310 (B) 324 (C) 320 (D) 321

Last Answer : (D) 321

If the Disk head is located initially at track 32, find the number of disk moves required with FCFS scheduling criteria if the disk queue of I/O blocks requests are: 98, 37, 14, 124, 65, 67 (A) 320 (B) 322 (C) 321 (D) 319

Description : If the Disk head is located initially at track 32, find the number of disk moves required with FCFS scheduling criteria if the disk queue of I/O blocks requests are: 98, 37, 14, 124, 65, 67 (A) 320 (B) 322 (C) 321 (D) 319

Last Answer : (C) 321

A three-phase alternator is operating at 450 volts, 250 amps at 0.6 power factor. If the power factor increases to 0.8, the kw load potential will increase by _____________. A. 38.525 kw B. 116.91 kw C. 155.88 kw D. 194.85 kw

Description : A three-phase alternator is operating at 450 volts, 250 amps at 0.6 power factor. If the power factor increases to 0.8, the kw load potential will increase by _____________. A. 38.525 kw B. 116.91 kw C. 155.88 kw D. 194.85 kw

Last Answer : Answer: A

In a three-wire, 230/115 volt DC system, the potential between neutral and negative is _____________. A. 0 volts B. 115 volts C. 230 volts D. 460 volts

Description : In a three-wire, 230/115 volt DC system, the potential between neutral and negative is _____________. A. 0 volts B. 115 volts C. 230 volts D. 460 volts

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ECE Board Exam March 1996 The potential difference between any exposed structured to ground in any electrical installation should not exceed _________ volts RMS. A. 10 B. 45 C. 0 D. 30

Description : ECE Board Exam March 1996 The potential difference between any exposed structured to ground in any electrical installation should not exceed _________ volts RMS. A. 10 B. 45 C. 0 D. 30

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What is the effect upon an electron that enters the buncher gap when the potential across the grids is at 0 volts?

Description : What is the effect upon an electron that enters the buncher gap when the potential across the grids is at 0 volts?

Last Answer : There is no effect

The redox carriers are grouped into respiratory chain complex (A) In the inner mitochondrial membrane (B) In mitochondiral matrix (C) On the outer mitochondrial membrane (D) On the inner surface of outer mitochondrial membrane

Description : The redox carriers are grouped into respiratory chain complex (A) In the inner mitochondrial membrane (B) In mitochondiral matrix (C) On the outer mitochondrial membrane (D) On the inner surface of outer mitochondrial membrane

Last Answer : Answer : A

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.