Inactive precursors of enzymes are known as (A) Apoenzymes (B) Coenzymes (C) Proenzymes (D) Holoenzymes

Inactive precursors of enzymes are known as (A) Apoenzymes (B) Coenzymes (C) Proenzymes (D) Holoenzymes
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Answer :  C
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Coenzymes combine with (A) Proenzymes (B) Apoenzymes (C) Holoenzymes (D) Antienzymes

Description : Coenzymes combine with (A) Proenzymes (B) Apoenzymes (C) Holoenzymes (D) Antienzymes

Last Answer : Answer : B

Enzymes having slightly different molecular structure but performing identical activity are (a) holoenzymes (b) isoenzymes (c) apoenzymes (d) coenzymes.

Description : Enzymes having slightly different molecular structure but performing identical activity are (a) holoenzymes (b) isoenzymes (c) apoenzymes (d) coenzymes.

Last Answer : (b) isoenzymes

Enzymes, which are produced in inactive form in the living cells, are called (A) Papain (B) Lysozymes (C) Apoenzymes (D) Proenzymes

Description : Enzymes, which are produced in inactive form in the living cells, are called (A) Papain (B) Lysozymes (C) Apoenzymes (D) Proenzymes

Last Answer : Answer : D

Enzymes functional in cell or mitochondria are (A) Endoenzymes (B) Exoenzymes (C) Apoenzymes (D) Holoenzymes

Description : Enzymes functional in cell or mitochondria are (A) Endoenzymes (B) Exoenzymes (C) Apoenzymes (D) Holoenzymes

Last Answer : Answer : A

Inactive zymogens are precursors of all the following gastrointestinal enzymes except (A) Carboxypeptidase (B) Pepsin (C) Amino peptidase (D) Chymotrypsin

Description : Inactive zymogens are precursors of all the following gastrointestinal enzymes except (A) Carboxypeptidase (B) Pepsin (C) Amino peptidase (D) Chymotrypsin

Last Answer : Answer : C

Multiple forms of the same enzymes are known as (A) Zymogens (B) Isoenzymes (C) Proenzymes (D) Pre-enzymes

Description : Multiple forms of the same enzymes are known as (A) Zymogens (B) Isoenzymes (C) Proenzymes (D) Pre-enzymes

Last Answer : Answer : B

The percentage of inactive precursors (monoidotyrosine and diiodotyrosine) in thyroglobulin is (A) 30 (B) 40 (C) 50 (D) 70

Description : The percentage of inactive precursors (monoidotyrosine and diiodotyrosine) in thyroglobulin is (A) 30 (B) 40 (C) 50 (D) 70

Last Answer : Answer : D

Enzymes which are always present in an organism are known as (A) Inducible enzymes (B) Constitutive enzymes (C) Functional enzymes (D) Apoenzymes

Description : Enzymes which are always present in an organism are known as (A) Inducible enzymes (B) Constitutive enzymes (C) Functional enzymes (D) Apoenzymes

Last Answer : Answer : B

The chemical forces that bind most coenzymes and substrates to enzymes such as LDH are (A) Hydrogen bonds (B) Peptide bonds (C) Coordinate bonds (D) Covalent bonds

Description : The chemical forces that bind most coenzymes and substrates to enzymes such as LDH are (A) Hydrogen bonds (B) Peptide bonds (C) Coordinate bonds (D) Covalent bonds

Last Answer : Answer : D

Coenzymes derived from the vitamin shown below are required by which of the following enzymes? (A) Lactate dehydrogenase (B) Glutamate dehydrogenase (C) Pyruvate dehydrogenase (D) Malate dehydrogenase

Description : Coenzymes derived from the vitamin shown below are required by which of the following enzymes? (A) Lactate dehydrogenase (B) Glutamate dehydrogenase (C) Pyruvate dehydrogenase (D) Malate dehydrogenase

Last Answer : Answer : C

Coenzymes derived from the vitamin shown below are required by enzymes involved in the synthesis of which of the following? (A) ATP (B) UTP (C) CTP (D) NADH

Description : Coenzymes derived from the vitamin shown below are required by enzymes involved in the synthesis of which of the following? (A) ATP (B) UTP (C) CTP (D) NADH

Last Answer : Answer : A

Coenzymes are (A) Heat stable, dialyzable, non protein organic molecules (B) Soluble, colloidal, protein molecules (C) Structural analogue of enzymes (D) Different forms of enzymes

Description : Coenzymes are (A) Heat stable, dialyzable, non protein organic molecules (B) Soluble, colloidal, protein molecules (C) Structural analogue of enzymes (D) Different forms of enzymes

Last Answer : Answer : A

Prosthetic groups differ from co-enzymes in that (a) they require metal ions for their activity (b) they (prosthetic groups) are tightly bound to apoenzymes (c) their association with apoenzymes is transient (d) they can serve as co-factors in a number of enzyme-catalyzed reactions.

Description : Prosthetic groups differ from co-enzymes in that (a) they require metal ions for their activity (b) they (prosthetic groups) are tightly bound to apoenzymes (c) their association with apoenzymes is transient (d) they can serve as co-factors in a number of enzyme-catalyzed reactions.

Last Answer : (b) they (prosthetic groups) are tightly bound to apoenzymes

Why do protease-supplying cells of the stomach and of the pancreas make only precursors of the active proteolytic enzymes?

Description : Why do protease-supplying cells of the stomach and of the pancreas make only precursors of the active proteolytic enzymes?

Last Answer : The stomach and the pancreas make zymogens of the proteases pepsin, chymotrypsin and trypsin and these zymogens are released into the gastric or duodenal lumen for activation. This happens to ... production of zymogens is a protective strategy against the natural effects of the proteolytic enzymes.

Proenzymes: (A) Chymotrysinogen (B) Pepsinogen (C) Both (A) and (B) (D) None of these

Description : Proenzymes: (A) Chymotrysinogen (B) Pepsinogen (C) Both (A) and (B) (D) None of these

Last Answer : Answer : B

In I-cell disease, lysosomal enzymes (A) Are not synthesised (B) Are inactive (C) Lack signal sequence (D) Cannot reach lysosomes

Description : In I-cell disease, lysosomal enzymes (A) Are not synthesised (B) Are inactive (C) Lack signal sequence (D) Cannot reach lysosomes

Last Answer : Answer : B

Organic molecules that increase the rate of metabolic reactions with themselveschangingareknown as A- coenzymes B- enzymes C- substrates D- .reactants

Description : Organic molecules that increase the rate of metabolic reactions with themselveschangingareknown as A- coenzymes B- enzymes C- substrates D- .reactants

Last Answer : enzymes

Vitamin B12 forms coenzymes known as (A) Cobamide (B) Transcobalamin I (C) Transcobalamin II (D) Both (B) and (C)

Description : Vitamin B12 forms coenzymes known as (A) Cobamide (B) Transcobalamin I (C) Transcobalamin II (D) Both (B) and (C)

Last Answer : Answer : A

Self-splicing can occur in (A) Some precursors of rRNA (B) Some precursors of tRNA (C) hnRNA (D) None of these

Description : Self-splicing can occur in (A) Some precursors of rRNA (B) Some precursors of tRNA (C) hnRNA (D) None of these

Last Answer : Answer : A

All of the following statements about post-transcriptional processing of tRNA are true except (A) Introns of some tRNA precursors are removed (B) CCA is added at 3′ end (C) 7-Methylguanosine triphosphate cap is added at 5′ end (D) Some bases are methylated

Description : All of the following statements about post-transcriptional processing of tRNA are true except (A) Introns of some tRNA precursors are removed (B) CCA is added at 3′ end (C) 7-Methylguanosine triphosphate cap is added at 5′ end (D) Some bases are methylated

Last Answer : Answer : C

Pancreatic juice contains the precursors of all of the following except (A) Trypsin (B) Chymotrypsin (C) Carboxypeptidase (D) Aminopeptidase

Description : Pancreatic juice contains the precursors of all of the following except (A) Trypsin (B) Chymotrypsin (C) Carboxypeptidase (D) Aminopeptidase

Last Answer : Answer : D

Coenzymes FMN and FAD are derived from vitamin (A) C (B) B6 (C) B1 (D) B2

Description : Coenzymes FMN and FAD are derived from vitamin (A) C (B) B6 (C) B1 (D) B2

Last Answer : Answer : D

Cobamide coenzymes are (A) Vitamin B1 (B) Riboflavin (C) Pyridoxine (D) Vitamin B12

Description : Cobamide coenzymes are (A) Vitamin B1 (B) Riboflavin (C) Pyridoxine (D) Vitamin B12

Last Answer : Answer : D

Dehydrogenases utilize, as coenzymes, all of the following except (A) NAD+ (B) NADP+ (C) FAD (D) FH4

Description : Dehydrogenases utilize, as coenzymes, all of the following except (A) NAD+ (B) NADP+ (C) FAD (D) FH4

Last Answer : Answer : D

All the following are coenzymes except (A) Ubiquinone (B) CoA (C) Pyruvate dehydrogenase (D) Lipoic acid

Description : All the following are coenzymes except (A) Ubiquinone (B) CoA (C) Pyruvate dehydrogenase (D) Lipoic acid

Last Answer : Answer : C

Coenzymes are required in which of the following reactions? (A) Oxidation-reduction (B) Transamination (C) Phosphorylation (D) All of these

Description : Coenzymes are required in which of the following reactions? (A) Oxidation-reduction (B) Transamination (C) Phosphorylation (D) All of these

Last Answer : Answer : D

Corrinoid coenzymes are coenzymes of (A) Vitamin B6 (B) Vitamin B12 (C) Vitamin B2 (D) Vitamin B1

Description : Corrinoid coenzymes are coenzymes of (A) Vitamin B6 (B) Vitamin B12 (C) Vitamin B2 (D) Vitamin B1

Last Answer : Answer : B

Corninoid coenzymes are coenzymes of (A) Vitamin B12 (B) Vitamin B6 (C) Vitamin B2 (D) Vitamin B1

Description : Corninoid coenzymes are coenzymes of (A) Vitamin B12 (B) Vitamin B6 (C) Vitamin B2 (D) Vitamin B1

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

For synthesis of sphingosine, all the following coenzymes are required except (A) Pyridoxal phosphate (B) NADPH (C) FAD (D) NAD

Description : For synthesis of sphingosine, all the following coenzymes are required except (A) Pyridoxal phosphate (B) NADPH (C) FAD (D) NAD

Last Answer : Answer : D

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

Assertion: Coacervates are believed to be precursors of life. Reason: Coacervates were self duplicating aggregates of proteins surrounded by lipid mol

Description : Assertion: Coacervates are believed to be precursors of life. Reason: Coacervates were self duplicating aggregates of proteins surrounded by lipid mol

Last Answer : Assertion: Coacervates are believed to be precursors of life. Reason: Coacervates were self duplicating ... both the assertion and reason are false.

How were the Ionian rebellion and the battle of Marathon precursors for the battle of Thermopylae?

Description : How were the Ionian rebellion and the battle of Marathon precursors for the battle of Thermopylae?

Last Answer : The Ionian rebellion brought in support from mainland Greekcity-states Eretria and Athens. After suppressing the revolt,Persia sent an expedition to capture those two city-states and putthem under ... to assemble their armies thefollowing year at Plataea, and won, so the invasion wasdefeated.

(1) the action of ultraviolet rays on oxygen Explanation: The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO ) and volatile organic compounds (VOCs), such as xylene, react in the atmosphere in the presence of sunlight containing ultra violet rays. NOx, CO, and VOCs are called ozone precursors. CO + 2O2 + CO2 + O3

Description : (1) the action of ultraviolet rays on oxygen Explanation: The majority of tropospheric ozone formation occurs when nitrogen oxides (NOx), carbon monoxide (CO ) and volatile organic compounds (VOCs), such as xylene, ... violet rays. NOx, CO, and VOCs are called ozone precursors. CO + 2O2 + CO2 + O3

Last Answer : Water is not effective in extinguishing a fire caused by petrol because - (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are ... (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn

Sometimes there are some indications that would indicate that perhaps an earthquake would occur. Such indications are called (a) Indicators (b) Precursors (c) Signal (d) Anticipations

Description : Sometimes there are some indications that would indicate that perhaps an earthquake would occur. Such indications are called (a) Indicators (b) Precursors (c) Signal (d) Anticipations

Last Answer : (b) Precursors

Premature ventricular contractions are considered precursors of ventricular tachycardia when they a) occur at a rate of more than six per minute. When PVCs occur at a rate of more than six per minute they indicate increasing ventricular irritability and are considered forerunners of ventricular tachycardia (VT). b) occur during the QRS complex. PVCs are dangerous when they occur on the T wave. c) have the same shape. PVCs are dangerous when they are multifocal (have different shapes). d) are paired with a normal beat. A PVC that is paired with a normal beat is termed bigeminy.

Description : Premature ventricular contractions are considered precursors of ventricular tachycardia when they a) occur at a rate of more than six per minute. When PVCs occur at a rate of more than six per minute they ... paired with a normal beat. A PVC that is paired with a normal beat is termed bigeminy.

Last Answer : a) occur at a rate of more than six per minute. When PVCs occur at a rate of more than six per minute they indicate increasing ventricular irritability and are considered forerunners of ventricular tachycardia (VT).

Bacteriophage (pron: back-teer-e-o-faj) are: a) bacteria b) bacteria precursors c) viruses d) agents which cause the production of bacteria

Description : Bacteriophage (pron: back-teer-e-o-faj) are: a) bacteria b) bacteria precursors c) viruses d) agents which cause the production of bacteria

Last Answer : ANSWER: C -- VIRUSES 

The main precursors of winter smog are (A) N2O and hydrocarbons (B) NOx and hydrocarbons (C) SO2 and hydrocarbons (D) SO2 and ozone

Description : The main precursors of winter smog are (A) N2O and hydrocarbons (B) NOx and hydrocarbons (C) SO2 and hydrocarbons (D) SO2 and ozone

Last Answer : (C) SO2 and hydrocarbons

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

All the following statements about acetyl CoA carboxylase are true except: (A) It is activated by citrate (B) It is inhibited by palmitoyl CoA (C) It can undergo covalent modification (D) Its dephosphorylated form is inactive

Description : All the following statements about acetyl CoA carboxylase are true except: (A) It is activated by citrate (B) It is inhibited by palmitoyl CoA (C) It can undergo covalent modification (D) Its dephosphorylated form is inactive

Last Answer : Answer : D

The free fatty acids in blood are (A) Stored in fat depots (B) Mainly bound to β-lipoproteins (C) Mainly bound to serum albumin (D) Metabolically most inactive

Description : The free fatty acids in blood are (A) Stored in fat depots (B) Mainly bound to β-lipoproteins (C) Mainly bound to serum albumin (D) Metabolically most inactive

Last Answer : Answer : C

Pentagastrin is a (A) Naturally occurring form of gastrin (B) Inactive metabolite of gastrin (C) Active metabolite of gastrin (D) Synthetic form of gastrin

Description : Pentagastrin is a (A) Naturally occurring form of gastrin (B) Inactive metabolite of gastrin (C) Active metabolite of gastrin (D) Synthetic form of gastrin

Last Answer : Answer : D

The optically inactive amino acid is (A) Glycine (B) Serine (C) Threonine (D) Valine

Description : The optically inactive amino acid is (A) Glycine (B) Serine (C) Threonine (D) Valine

Last Answer : Answer : A

Reactivation of inactive liver phosphorylase is normally favoured by (A) Insulin (B) Epinephrine (C) ACTH (D) Glucagon

Description : Reactivation of inactive liver phosphorylase is normally favoured by (A) Insulin (B) Epinephrine (C) ACTH (D) Glucagon

Last Answer : D

Which amino acid is optically inactive?

Description : Which amino acid is optically inactive?

Last Answer : Glycine.

The optically inactive amino acid is (A) Glycine (B) Serine (C) Threonine (D) Valine

Description : The optically inactive amino acid is (A) Glycine (B) Serine (C) Threonine (D) Valine

Last Answer : (A) Glycine

Who discovered Coenzymes? -Biology

Description : Who discovered Coenzymes? -Biology

Last Answer : answer:

$ Coenzymes are usually proteins ! The term feedback refers to the effect of enzyme concentration on its rate of reaction.

Description : $ Coenzymes are usually proteins ! The term feedback refers to the effect of enzyme concentration on its rate of reaction.

Last Answer : $ Coenzymes are usually proteins ! The term feedback refers to the effect of enzyme concentration on its rate ... wrong D. If both As and R are wrong.

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`

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`