How are enzymes classified?

How are enzymes classified?
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Answer :

They are classified into five major classes.
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How are co-enzymes classified?

Description : How are co-enzymes classified?

Last Answer : (a) Those taking part in reactions catalysed by oxidoreductases by donating or accepting hydrogen atoms or electrons. (b) Those co-enzymes taking part in reactions transferring groups other than hydrogen.

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these (a) help in regulating metabolism (b) are exclusively synthesized in the body of a living organism as at present (c) are conjugated proteins (d) enhance oxidative metabolism.

Description : Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these (a) help in regulating metabolism (b) are exclusively synthesized in the body of a living organism as at present (c) are conjugated proteins (d) enhance oxidative metabolism.

Last Answer : (a) help in regulating metabolism

Transfer RNAs are classified on the basis of the number of base pairs in (A) Acceptor arm (B) Anticodon arm (C) D arm (D) Extra arm

Description : Transfer RNAs are classified on the basis of the number of base pairs in (A) Acceptor arm (B) Anticodon arm (C) D arm (D) Extra arm

Last Answer : Answer : D

The immunoglobulins are classified on the basis of (A) Light chains (B) Heavy chains (C) Carbohydrate content (D) Electrophoretic mobility

Description : The immunoglobulins are classified on the basis of (A) Light chains (B) Heavy chains (C) Carbohydrate content (D) Electrophoretic mobility

Last Answer : Answer : B

An enzyme catalyzes the conversion of an aldose sugar to a ketose sugar would be classified as one of the (A) Transferases (B) Isomerases (C) Oxido reductases (D) Hydrolases

Description : An enzyme catalyzes the conversion of an aldose sugar to a ketose sugar would be classified as one of the (A) Transferases (B) Isomerases (C) Oxido reductases (D) Hydrolases

Last Answer : Answer : B

Which of the following are classified as essential fatty acids? (A) Arachidonic acid (B) Oleic acid (C) Acetic acid (D) Butyric acid

Description : Which of the following are classified as essential fatty acids? (A) Arachidonic acid (B) Oleic acid (C) Acetic acid (D) Butyric acid

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Cerebrosides may also be classified as (A) Sphingolipids (B) Sulpholipids (C) Aminolipids (D) Glycolipids

Description : Cerebrosides may also be classified as (A) Sphingolipids (B) Sulpholipids (C) Aminolipids (D) Glycolipids

Last Answer : Answer : A

Which one of the following statements concerning glutamine is correct? (A) Contains three tetratable groups (B) Is classified as an acidic amino acid (C) Contains an amide group (D) Migrates to the cathode during electrophoresis at pH 7.0

Description : Which one of the following statements concerning glutamine is correct? (A) Contains three tetratable groups (B) Is classified as an acidic amino acid (C) Contains an amide group (D) Migrates to the cathode during electrophoresis at pH 7.0

Last Answer : Answer : C

In metabolic point of view, amino acids are classified as (A) Glycogenic (B) Ketogenic (C) Glycogenic or Ketogenic (D) All of these

Description : In metabolic point of view, amino acids are classified as (A) Glycogenic (B) Ketogenic (C) Glycogenic or Ketogenic (D) All of these

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Immunoglobulins are classified on the basis of (A) Type of light chains (B) Type of heavy chains (C) Types of light and heavy chains (D) Molecular weight

Description : Immunoglobulins are classified on the basis of (A) Type of light chains (B) Type of heavy chains (C) Types of light and heavy chains (D) Molecular weight

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How phospholipids are classified?

Description : How phospholipids are classified?

Last Answer : 1. Nitrogen containing glycero phosphatides, 2. Non-nitrogen containing glycero phosphatides, 3. Plasmalogens, 4. Phospho sphingosides 5. Glycosphingolipids 6. Sulpholipids.

How prostaglandins are classified?

Description : How prostaglandins are classified?

Last Answer : According to the attachment of different substituent groups to the ring, PGs are named with capital letters such as A, B, E and F. In the same series, depending on number of double bonds on the side chains ... have two double bonds at 13-14 (trans) and 5-6 (cis). This is the most common variety.

Fatty acids are classified in any other manner?

Description : Fatty acids are classified in any other manner?

Last Answer : They are also classified as saturated or unsaturated fatty acids.

How lipids are classified?

Description : How lipids are classified?

Last Answer : Simple, compound and derived.

How diabetes mellitus is classified?

Description : How diabetes mellitus is classified? 

Last Answer : Type 1 and type 2.

How polysaccharides are classified?

Description : How polysaccharides are classified?

Last Answer : Homopolysaccharides (homoglycans) and heteropolysaccharides (heteroglycans).

How are monosaccharides further classified?

Description : How are monosaccharides further classified?

Last Answer : Sugars having aldehyde group are called aldoses and sugars with keto group are ketoses.

How carbohydrates are classified?

Description : How carbohydrates are classified?

Last Answer : Based on the number of the sugar units available, they are classified as monosaccharides, disaccharides, oligosaccharides, and polysaccharides.

Thermodynamically, how reactions are classified?

Description : Thermodynamically, how reactions are classified?

Last Answer : Exothermic, isothermic and endothermic reactions.

Peptidases are classified under which class of enzyme?

Description : Peptidases are classified under which class of enzyme?

Last Answer : Hydrolases.

Based on physiochemical properties, how are they classified?

Description : Based on physiochemical properties, how are they classified?

Last Answer : Simple proteins, conjugated proteins and derived proteins

How proteins are classified?

Description : How proteins are classified?

Last Answer : They may be classified depending on the func- tion or based on the physicochemical characteris- tics or based on their nutritional value.

How are co-transport systems classified?

Description : How are co-transport systems classified?

Last Answer : The cotransport system may be symport or antiport

Restriction enzymes have been found in (A) Humans (B) Birds (C) Bacteria (D) Bacteriophase

Description : Restriction enzymes have been found in (A) Humans (B) Birds (C) Bacteria (D) Bacteriophase

Last Answer : Answer : C

Which of the following is present as a marker in lysosomal enzymes to direct them to their destination? (A) Glucose-6-phosphate (B) Mannose-6-phosphate (C) Galactose-6-phosphate (D) N-Acetyl neuraminic acid

Description : Which of the following is present as a marker in lysosomal enzymes to direct them to their destination? (A) Glucose-6-phosphate (B) Mannose-6-phosphate (C) Galactose-6-phosphate (D) N-Acetyl neuraminic acid

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DNA contains some palindromic sequences which (A) Mark the site for the formation of replication forks (B) Direct DNA polymerase to turn back to replicate the other strand (C) Are recognized by restriction enzymes (D) Are found only in bacterial DNA

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All of the following enzymes are unique to purine nucleotide synthesis except (A) PRPP synthetase (B) PRPP glutamyl amido transferase (C) Adenylosuccinate synthetase (D) IMP dehydrogenase

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In the pathway of de novo synthesis of purine nucleotides, all the following are allosteric enzymes except (A) PRPP glutamyl amido transferase (B) Adenylosuccinate synthetase (C) IMP dehydrogenase (D) Adenylosuccinase

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In the process of transcription in bacterial cells (A) Initiation requires rho protein (B) RNA polymerase incorporates methylated bases in correct sequence (C) Both the sigma unit and core enzymes of RNA polymerase are required for accurate promotor site binding (D) Primase is necessary for initiation

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After termination of the synthesis of RNA molecule, the core enzymes separate from the DNA template. The core enzymes then recognize a promoter at which the synthesis of a new RNA molecule commences, with the assistance of (A) Rho (ρ) factor (B) δ factor (C) β factor (D) σ factor

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Orotic aciduria type I reflects the deficiency of enzymes: (A) Orotate phosphoribosyl transferase and orotidylate decarboxylase (B) Dihydroorotate dehydrogenase (C) Dihydroorotase (D) Carbamoyl phosphate synthetase

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Last Answer : Answer : A

A substrate for enzymes of pyrimidine nucleotide biosynthesis is (A) Allopurinol (B) Tetracylin (C) Chloramphenicol (D) Puromycin

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In the biosynthesis of cortiol, the sequence of enzymes involved is (A) Hydroxylase–dehydrogenase + isomerase – hydroxylase (B) Dehydrogenase–hydroxylase–isomerase (C) Hydroxylase–lyase–dehydrogenase isomerase (D) Isomerase–lyase–hydroxylase–dehydrogenase

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Last Answer : Answer : A

Hormones (A) Act as coenzyme (B) Act as enzyme (C) Influence synthesis of enzymes (D) Belong to B-complex group

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Hinge region, the region of Ig molecule which is flexible and more exposed to enzymes is the (A) Region between first and second constant regions of H chain (domains CH1 and CH2) (B) Region between second and third constant regions of H chain (CH2 and CH3) (C) Variable regions of H chain (D) Variable regions of L chain

Description : Hinge region, the region of Ig molecule which is flexible and more exposed to enzymes is the (A) Region between first and second constant regions of H chain (domains CH1 and CH2) (B) Region between second and ... H chain (CH2 and CH3) (C) Variable regions of H chain (D) Variable regions of L chain

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In conversion of lactic acid to glucose, three reactions of glycolytic pathway are circumvented, which of the following enzymes do not participate? (A) Pyruvate carboxylase (B) Phosphoenol pyruvate carboxy kinase (C) Pyruvate kinase (D) Glucose-6-phosphatase

Description : In conversion of lactic acid to glucose, three reactions of glycolytic pathway are circumvented, which of the following enzymes do not participate? (A) Pyruvate carboxylase (B) Phosphoenol pyruvate carboxy kinase (C) Pyruvate kinase (D) Glucose-6-phosphatase

Last Answer : Answer : B

A mitochondrial marker enzyme is (A) Aldolase (B) Amylase (C) Succinic dehydrogenase (D) Pyruvate dehydrogenase ENZYMES 175

Description : A mitochondrial marker enzyme is (A) Aldolase (B) Amylase (C) Succinic dehydrogenase (D) Pyruvate dehydrogenase ENZYMES 175

Last Answer : Answer : C

The enzymes present in the membrane of mitochondria are (A) Flavoproteins and cytochromes (B) Fumarase and lipase (C) Enolase and catalase (D) Hexokinase and zymase

Description : The enzymes present in the membrane of mitochondria are (A) Flavoproteins and cytochromes (B) Fumarase and lipase (C) Enolase and catalase (D) Hexokinase and zymase

Last Answer : Answer : A

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

In cell, digestive enzymes are found mainly in (A) Vacuoles (B) Lysosomes (C) Ribosomes (D) Lomasomes

Description : In cell, digestive enzymes are found mainly in (A) Vacuoles (B) Lysosomes (C) Ribosomes (D) Lomasomes

Last Answer : Answer : B

Out of the total enzymes present in a cell, a mitochondrion alone has (A) 4% (B) 70% (C) 95% (D) 50%

Description : Out of the total enzymes present in a cell, a mitochondrion alone has (A) 4% (B) 70% (C) 95% (D) 50%

Last Answer : Answer : B

The best example of extracellular enzymes (exoenzyme) is (A) Nucleases (B) Digestive enzymes (C) Succinic dehydrogenase (D) None of these

Description : The best example of extracellular enzymes (exoenzyme) is (A) Nucleases (B) Digestive enzymes (C) Succinic dehydrogenase (D) None of these

Last Answer : Answer : C

The fruit when kept is open, tastes bitter after 2 hours because of (A) Loss of water from juice (B) Decreased concentration of fructose in juice (C) Fermentation by yeast (D) Contamination by bacterial enzymes

Description : The fruit when kept is open, tastes bitter after 2 hours because of (A) Loss of water from juice (B) Decreased concentration of fructose in juice (C) Fermentation by yeast (D) Contamination by bacterial enzymes

Last Answer : Answer : D

Who got Nobel Prize in 1978 for working on enzymes? (A) Koshland (B) Arber and Nathans (C) Nass and Nass (D) H.G. Khorana

Description : Who got Nobel Prize in 1978 for working on enzymes? (A) Koshland (B) Arber and Nathans (C) Nass and Nass (D) H.G. Khorana

Last Answer : Answer : A

Which is not true about inorganic catalysts and enzymes? (A) They are specific (B) Inorganic catalysts require specific not needed by enzymes (C) They are sensitive to pH (D) They speed up the rate of chemical reaction

Description : Which is not true about inorganic catalysts and enzymes? (A) They are specific (B) Inorganic catalysts require specific not needed by enzymes (C) They are sensitive to pH (D) They speed up the rate of chemical reaction

Last Answer : Answer : B