ALP ACP

a

What metal component is a structural part of the Alkaline Phosphatase (ALP) enzyme?

​a) Zinc

b) Magnesium

c) Copper

d) Iron

e) Calcium

a

Which condition causes a pronounced elevation of ALP activity that is greater than 5 times the normal limit?

​a) Paget's disease (Osteitis deformans)

b) Infectious mononucleosis

c) Viral hepatitis

d) Healing fractures

e) Normal child growth patterns

a

What chemical agent is used to specifically inhibit the liver and bone isoenzymes of ALP?

​a) Levamisole

b) L-phenylalanine

c) 3M Urea

d) L-tartrate

e) Formaldehyde

a

What substrate is used in the Bessy, Lowry, and Brock method for ALP measurement?

​a) p-Nitrophenylphosphate (PNPP)

b) Beta-glycerophosphate

c) Phenylphosphate

d) Phenolphthalein diphosphate

e) Alpha naphthol phosphate

a

Prostatic Acid Phosphatase (Prostatic ACP) is specifically inhibited by which of the following substances?

​a) L-tartrate solution

b) 2% formaldehyde solution

c) 1mM cupric sulfate solution

d) L-leucine

e) Levamisole

b

Which metal ion functions as the enzyme activator for Alkaline Phosphatase (ALP)?

​a) Zinc

b) Magnesium

c) Copper

d) Manganese

e) Iron

b

Under electrophoretic separation, which ALP isoenzyme migrates closest to the cathode (least anodal)?

​a) Liver ALP

b) Intestinal ALP

c) Placental ALP

d) Bone ALP

e) Regan ALP

b

Among the major normal isoenzymes of ALP, which is the MOST heat-labile (heat-sensitive) when exposed to 56 °C for 10-15 minutes?

​a) Placental ALP

b) Bone ALP

c) Liver ALP

d) Intestinal ALP

e) Regan ALP

b

What is the optimal pH environment required for the IFCC-recommended Bowers and McComb method for ALP measurement?

​a) pH 5.0

b) pH 10.15

c) pH 6.2

d) pH 7.4

e) pH 8.5

b

Tartrate-resistant acid phosphatase (TRAP) is a characteristic biomarker present in which malignancy?

​a) Acute lymphoblastic leukemia of B-cell origin

b) Hairy cell leukemia

c) Prostatic adenocarcinoma

d) Osteogenic sarcoma

e) Ovarian carcinoma

c

In healthy individual sera, total ALP levels are primarily derived from which two tissue sources?

​a) Intestine and Placenta

b) Spleen and Kidney

c) Liver and Bone

d) Prostate and Red blood cells

e) Lung and Pancreas

c

Which ALP carcinoplacental isoenzyme is inhibited by L-leucine and is associated with pancreatic, bile duct, and pleural cancers?

​a) Regan ALP

b) Placental ALP

c) Nagao ALP

d) Bone ALP

e) Intestinal ALP

c

What wavelength is used to measure the absorbance increase directly proportional to ALP activity in the continuous monitoring method?

​a) 340 nm

b) 540 nm

c) 405 nm

d) 620 nm

e) 500 nm

c

What end product is formed when phenolphthalein diphosphate (PPDP) is acted upon by ALP in the Huggins and Talalay method?

​a) Inorganic phosphate

b) Yellow nitrophenoxide ion

c) Phenolphthalein red

d) Free thymolphthalein

e) Alpha-naphthol

c

What is the preferred anticoagulant and target pH range for sample preparation to prevent the loss of ACP activity?

​a) Heparin at pH 7.4

b) Oxalate at pH 5.0

c) Citrate at pH 6.2–6.6

d) Fluoride at pH 10.15

e) EDTA at pH 8.0

d

The elevation of intestinal ALP in serum following a high-fat meal is dependent on which blood group characteristics?

​a) Blood group A non-secretors

b) Blood group AB secretors

c) Blood group A or AB individuals

d) Blood group B or O secretors

e) Rh-negative individuals

d

To improve electrophoretic resolution between bone and liver ALP isoenzymes, which reagent is added to bind non-bone isoenzymes?

​a) Neuraminidase

b) L-phenylalanine

c) Levamisole

d) Wheat germ lectin

e) 3M Urea

d

What end product is generated when using phenylphosphate as a substrate in the King and Armstrong method for ALP?

​a) Inorganic phosphate

b) p-Nithenol

c) Free phenolphthalein

d) Phenol

e) Glycerol

d

Erythrocytic Acid Phosphatase (Erythrocytic ACP) is specifically inhibited by which pair of chemical solutions?

​a) L-tartrate and L-phenylalanine

b) Levamisole and 3M Urea

c) Neuraminidase and Wheat germ lectin

d) 2% formaldehyde and 1mM cupric sulfate

e) Fluoride and EDTA

d

In forensic clinical chemistry investigations of rape cases, seminal fluid ACP activity in vaginal washings can persist for up to how long?

​a) 12 hours

b) 24 hours

c) 48 hours

d) 4 days

e) 7 days

e

Smoking causes approximately what percentage increase in total serum ALP activity?

​a) 5%

b) 15%

c) 25%

d) 50%

e) 10%

e

Which ALP isoenzyme demonstrates the HIGHEST overall stability when subjected to heat denaturation?

​a) Bone ALP

b) Liver ALP

c) Intestinal ALP

d) Placental ALP

e) Regan ALP

e

Why does ACP activity in unpreserved serum samples decrease within 1 to 2 hours at room temperature?

​a) Degradation by lysosomal proteases

b) Oxidation of active site zinc ions

c) Precipitation of bone isoenzymes

d) Inactivation by exposure to light

e) Loss of CO2 leading to increased pH

e

Which method for Acid Phosphatase utilizes Thymolphthalein monophosphate as its specific substrate for quantitative endpoint reaction?

​a) Gutman and Gutman

b) Shinowara

c) Babson, Read and Phillips

d) Bowers and McComb

e) Roy and Hillman

e

Acid Phosphatase staining is used in the differential diagnosis of Acute Lymphoblastic Leukemia (ALL). Which subtype is ACP positive?

​a) Pre-B cell ALL

b) B-cell origin ALL

c) Null-cell ALL

d) Myeloid-lineage ALL

e) T-cell origin ALL