LDH isoenzymes?

LDH isoenzymes?
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DefinitionLDH isoenzymes is a test to check how much lactate dehydrogenase (LDH) is in the blood.Alternative NamesLD; Lactic (lactate) dehydrogenase isoenzymesHow the test is performedBlood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm.Once the blood has been collected, the needle is removed, and the puncture site is covered to stop any bleeding.In infants or young child
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In which diseases of the following organs, isoenzymes LDH-1 and LDH-2 will be released in plasma? (A) Kidney, R.B.C and Liver (B) Heart, Kidney and R.B.C (C) Heart, Kidney and Liver (D) Heart, Lungs and Brain

Description : In which diseases of the following organs, isoenzymes LDH-1 and LDH-2 will be released in plasma? (A) Kidney, R.B.C and Liver (B) Heart, Kidney and R.B.C (C) Heart, Kidney and Liver (D) Heart, Lungs and Brain

Last Answer : Answer : B

The isoenzymes of LDH (A) Differ only in a single amino acid (B) Differ in catalytic activity (C) Exist in 5 forms depending on M and H monomer contents (D) Occur as monomers

Description : The isoenzymes of LDH (A) Differ only in a single amino acid (B) Differ in catalytic activity (C) Exist in 5 forms depending on M and H monomer contents (D) Occur as monomers

Last Answer : Answer : C

What are Isozymes / Isoenzymes? -Biology

Description : What are Isozymes / Isoenzymes? -Biology

Last Answer : answer:

CPK isoenzymes test?

Description : CPK isoenzymes test?

Last Answer : DefinitionThe CPK isoenzymes test measures the different forms of creatine phosphokinase (CPK) in the blood. CPK is an enzyme found mainly in the heart, brain, and skeletal muscle.See also: Creatine ... blood collects into an airtight vial or tube attached to the needle. The elastic band is re

Isoenzymes of lactate dehydrogenase are useful for the diagnosis of (A) Heart disease (B) Kidney disease (C) Liver disease (D) Both (A) and (C)

Description : Isoenzymes of lactate dehydrogenase are useful for the diagnosis of (A) Heart disease (B) Kidney disease (C) Liver disease (D) Both (A) and (C)

Last Answer : Answer : D

All the isoenzymes function with the coenzyme: (A) NADP+ (B) FAD (C) Lipoate (D) NAD+

Description : All the isoenzymes function with the coenzyme: (A) NADP+ (B) FAD (C) Lipoate (D) NAD+

Last Answer : Answer : D

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

Different isoenzymes of an enzyme have the same (A) Amino acid sequence (B) Michaelis constant (C) Catalytic activity (D) All of these

Description : Different isoenzymes of an enzyme have the same (A) Amino acid sequence (B) Michaelis constant (C) Catalytic activity (D) All of these

Last Answer : Answer : C

The first enzyme found to have isoenzymes was (A) Alkaline Phosphatase (B) Lactate dehydrogenase (C) Acid Phosphatase (D) Creatine kinase

Description : The first enzyme found to have isoenzymes was (A) Alkaline Phosphatase (B) Lactate dehydrogenase (C) Acid Phosphatase (D) Creatine kinase

Last Answer : Answer : B

The CK isoenzymes present in cardiac muscle is (A) BB and MB (B) MM and MB (C) BB only (D) MB only

Description : The CK isoenzymes present in cardiac muscle is (A) BB and MB (B) MM and MB (C) BB only (D) MB only

Last Answer : Answer : B

The isoenzymes LDH5 is elevated in (A) Myocardial infarction (B) Peptic ulcer (C) Liver disease (D) Infectious diseases

Description : The isoenzymes LDH5 is elevated in (A) Myocardial infarction (B) Peptic ulcer (C) Liver disease (D) Infectious diseases

Last Answer : Answer : C

Isoenzymes can be characterized by (A) Proteins lacking enzymatic activity that are necessary for the activation of enzymes (B) Proteolytic enzymes activated by hydrolysis (C) Enzymes with identical primary structure (D) Similar enzymes that catalyse different reaction

Description : Isoenzymes can be characterized by (A) Proteins lacking enzymatic activity that are necessary for the activation of enzymes (B) Proteolytic enzymes activated by hydrolysis (C) Enzymes with identical primary structure (D) Similar enzymes that catalyse different reaction

Last Answer : Answer : B

Isoenzymes are (A) Chemically, immunologically and electrophoretically different forms of an enzyme (B) Different forms of an enzyme similar in all properties (C) Catalysing different reactions (D) Having the same quaternary structures like the enzymes

Description : Isoenzymes are (A) Chemically, immunologically and electrophoretically different forms of an enzyme (B) Different forms of an enzyme similar in all properties (C) Catalysing different reactions (D) Having the same quaternary structures like the enzymes

Last Answer : Answer : A

Isoenzymes for a given reaction (A) Have different spedificities (B) Have identical affinities for the same substrate (C) Exhibit different electrophoretic motilities (D) Contain similar ratios of different polypeptide chains

Description : Isoenzymes for a given reaction (A) Have different spedificities (B) Have identical affinities for the same substrate (C) Exhibit different electrophoretic motilities (D) Contain similar ratios of different polypeptide chains

Last Answer : Answer : B

The cyclooxygenase isoenzymes COX-1 and COX-2 differ from each other in that (a) They catalyse different pathways in prostanoid biosynthesis (b) COX–1 is inhibited by aspirin but not COX–2 (c) COX–2 is inhibited by ibuprofen but not COX–1 (d) COX–1 is constitutive while COX–2 is inducible

Description : The cyclooxygenase isoenzymes COX-1 and COX-2 differ from each other in that (a) They catalyse different pathways in prostanoid biosynthesis (b) COX–1 is inhibited by aspirin but not COX–2 (c) COX–2 is inhibited by ibuprofen but not COX–1 (d) COX–1 is constitutive while COX–2 is inducible

Last Answer : Ans: D

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

Which of the following cytochrome P450 isoenzymes is involved in the metabolism of largest number of drugs in human beings and has been implicated in some dangerous drug interactions: A. CYP 3A4 B. CYP 2C9 C. CYP 2E1 D. CYP 1A2

Description : Which of the following cytochrome P450 isoenzymes is involved in the metabolism of largest number of drugs in human beings and has been implicated in some dangerous drug interactions: A. CYP 3A4 B. CYP 2C9 C. CYP 2E1 D. CYP 1A2

Last Answer : A. CYP 3A4

The cyclooxygenase isoenzymes COX-1 and COX-2 differ from each other in that: A. They catalyse different pathways in prostanoid biosynthesis B. COX-1 is inhibited by aspirin but not COX-2 C. COX-2 is inhibited by ibuprofen but not COX-1 D. COX-1 is constitutive while COX-2 is largely

Description : The cyclooxygenase isoenzymes COX-1 and COX-2 differ from each other in that: A. They catalyse different pathways in prostanoid biosynthesis B. COX-1 is inhibited by aspirin but not COX-2 C. COX-2 is inhibited by ibuprofen but not COX-1 D. COX-1 is constitutive while COX-2 is largely

Last Answer : D. COX-1 is constitutive while COX-2 is largely

Which of the following cytochrome P450 isoenzymes is involved in the metabolism of largest number of drugs in human beings and has been implicated in some dangerous drug interactions: A. CYP 3A4 B. CYP 2C9 C. CYP 2E1 D. CYP 1A2

Description : Which of the following cytochrome P450 isoenzymes is involved in the metabolism of largest number of drugs in human beings and has been implicated in some dangerous drug interactions: A. CYP 3A4 B. CYP 2C9 C. CYP 2E1 D. CYP 1A2

Last Answer : A. CYP 3A4

What can cause Low Lymphocyte count and elevated LDH?

Description : What can cause Low Lymphocyte count and elevated LDH?

Last Answer : Feel Free to Answer

What is the difference between LDH and LDL cholesterol levels?

Description : What is the difference between LDH and LDL cholesterol levels?

Last Answer : LDL cholesterol levels are the calculation of bad levels in your body while HDL is considered to by the levels of good cholesterol in your body. Good cholesterol ratings can be maintained with proper exercise and diet.

How many different proteins may be present in normal LDH? (A) One (B) Two (C) Three (D) Four

Description : How many different proteins may be present in normal LDH? (A) One (B) Two (C) Three (D) Four

Last Answer : Answer : D

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

LDH assays are most useful in diagnosing diseases of the (A) Heart (B) Pancreas (C) Brain (D) Kidney

Description : LDH assays are most useful in diagnosing diseases of the (A) Heart (B) Pancreas (C) Brain (D) Kidney

Last Answer : Answer : A

An increase in LDH-5 enzyme is seen in the following except (A) Acute hepatitis (B) Muscular distrophies (C) Breast carcinoma (D) Pulmonary embolism

Description : An increase in LDH-5 enzyme is seen in the following except (A) Acute hepatitis (B) Muscular distrophies (C) Breast carcinoma (D) Pulmonary embolism

Last Answer : Answer : D

On the third day following onset of acute myocardial infarction, which enzyme estimation will have the best predictive value? (A) Serum AST (B) Serum CK (C) Serum ALT (D) Serum LDH

Description : On the third day following onset of acute myocardial infarction, which enzyme estimation will have the best predictive value? (A) Serum AST (B) Serum CK (C) Serum ALT (D) Serum LDH

Last Answer : Answer : D

Liver and skeletol measle disorders are characterized by on disk proportionate increase in which of the LDH isoenzyme fraction? (A) LDH-1 (B) LDH-1 and LDH-2 (C) LDH-3 and LDH-4 (D) LDH-2 and LDH-3 (E) LDH-5

Description : Liver and skeletol measle disorders are characterized by on disk proportionate increase in which of the LDH isoenzyme fraction? (A) LDH-1 (B) LDH-1 and LDH-2 (C) LDH-3 and LDH-4 (D) LDH-2 and LDH-3 (E) LDH-5

Last Answer : Answer : C

Which enzyme estimation will be helpful in differentiating the elevated serum ALP found in obstructive jaundice as well as bone disorders? (A) Serum AST (B) Serum ALT (C) Serum LDH (D) Serum γ-GT

Description : Which enzyme estimation will be helpful in differentiating the elevated serum ALP found in obstructive jaundice as well as bone disorders? (A) Serum AST (B) Serum ALT (C) Serum LDH (D) Serum γ-GT

Last Answer : Answer : D

If results of the serum bilirubin, serum ALP, LDH and AST determinations suggest obstructive jaundice, the best confirmatory test would be the estimation of (A) Serum ALT (B) Serum 5’ nucleotidase (C) Serum Pseudo cholinesterase (D) None of these

Description : If results of the serum bilirubin, serum ALP, LDH and AST determinations suggest obstructive jaundice, the best confirmatory test would be the estimation of (A) Serum ALT (B) Serum 5’ nucleotidase (C) Serum Pseudo cholinesterase (D) None of these

Last Answer : Answer : B

Patients with hepatocellular jaundice, as compared to those with purely obstructive jaundice tend to have (A) Lower serum ALP, LDH and AST activity (B) Lower serum ALP, Higher LDH and AST activity (C) Higher serum ALP, LDH and AST activity (D) Higher serum ALP, Lower LDH and AST activity

Description : Patients with hepatocellular jaundice, as compared to those with purely obstructive jaundice tend to have (A) Lower serum ALP, LDH and AST activity (B) Lower serum ALP, Higher LDH and AST activity (C) Higher serum ALP, LDH and AST activity (D) Higher serum ALP, Lower LDH and AST activity

Last Answer : Answer : B

The slow moving fraction of LDH is typically increased in pancreas with (A) Cerebrovascular accidents (B) Acute myocardial infarction (C) Acute pancreatitis (D) Acute viral hepatits

Description : The slow moving fraction of LDH is typically increased in pancreas with (A) Cerebrovascular accidents (B) Acute myocardial infarction (C) Acute pancreatitis (D) Acute viral hepatits

Last Answer : Answer : D

From the following myocardial infarction, the earliest serum enzyme to rise is (A) Creatine Kinase (B) GOT (C) GPT (D) LDH

Description : From the following myocardial infarction, the earliest serum enzyme to rise is (A) Creatine Kinase (B) GOT (C) GPT (D) LDH

Last Answer : Answer : A

Which of the following serum enzyme rises in myocardial infarction: (A) Creatine kinase (B) GOT (C) LDH (D) All of these

Description : Which of the following serum enzyme rises in myocardial infarction: (A) Creatine kinase (B) GOT (C) LDH (D) All of these

Last Answer : Answer : D

On the third day of onset of acute myocardial infarction the enzyme elevated is (A) Serum AST (B) Serum CK (C) Serum LDH (D) Serum ALT

Description : On the third day of onset of acute myocardial infarction the enzyme elevated is (A) Serum AST (B) Serum CK (C) Serum LDH (D) Serum ALT

Last Answer : Answer : C

In early stages of myocardial ischemia the most sensitive indicator is the measurement of the activity of (A) CPK (B) SGPT (C) SGOT (D) LDH

Description : In early stages of myocardial ischemia the most sensitive indicator is the measurement of the activity of (A) CPK (B) SGPT (C) SGOT (D) LDH

Last Answer : Answer : A

Hepatocellular jaundice as compared to pure obstructive type of jaundice is characterized by (A) Increased serum alkaline phosphate, LDH and ALT (B) Decreased serum alkaline phosphatase, LDH and ALT (C) Increased serum alkaline phosphatase and decreased levels of LDH and ALT (D) Decreased serum alkaline phosphatase and increased serum LDH and ALT

Description : Hepatocellular jaundice as compared to pure obstructive type of jaundice is characterized by (A) Increased serum alkaline phosphate, LDH and ALT (B) Decreased serum alkaline phosphatase, LDH and ALT (C ... levels of LDH and ALT (D) Decreased serum alkaline phosphatase and increased serum LDH and ALT

Last Answer : Answer : D

What is the advantage of CK estimation over LDH estimation to identify myocardial infarction?

Description : What is the advantage of CK estimation over LDH estimation to identify myocardial infarction?

Last Answer : The CK level starts to rise within three hours of infarction. Therefore, CK estimation is very useful to detect early cases, where ECG changes may be ambiguous. The CK level is not increased in hemolysis or in congestive cardiac failure; and therefore CK has an advantage over LDH.

LDH level in blood is increased in which conditions?

Description : LDH level in blood is increased in which conditions?

Last Answer : Myocardial infarction, hemolytic anemias, muscular dystrophy, carcinomas, leukemias, and any condition which causes necrosis of body cells.

How do you separate LDH iso-enzymes in laboratory?

Description : How do you separate LDH iso-enzymes in laboratory?

Last Answer : By cellulose acetate electrophoresis at pH 8.6.

patent is presented with SOB. On Xray he has cardiomegaly and rt. pleural effusion. pleural aspiration reveals: protein is <30, LDH <200 IU. dx: CHF. pneumonia. TB hyperproteinemia.

Description : patent is presented with SOB. On Xray he has cardiomegaly and rt. pleural effusion. pleural aspiration reveals: protein is

Last Answer : CHF.