Biochemistry Quiz

Which vitamin is required for the synthesis of rhodopsin?

• Vitamin A

• Vitamin C

• Vitamin K

• Vitamin D

Which enzyme is deficient in Lesch-Nyhan syndrome?

• HGPRT

• ADA

• Xanthine oxidase

• Orotate phosphoribosyltransferase

Which of the following is the coenzyme form of niacin?

• NAD+

• FAD

• TPP

• FMN

Which buffer system is most effective in blood?

• Bicarbonate buffer

• Phosphate buffer

• Protein buffer

• Ammonia buffer

Menkes disease is due to defect in absorption of which mineral?

• Copper

• Zinc

• Iron

• Calcium

Which of the following increases in obstructive jaundice?

• Conjugated bilirubin

• Unconjugated bilirubin

• Urobilinogen

• Hemoglobin

Wilson's disease is associated with accumulation of which metal?

• Copper

• Iron

• Zinc

• Lead

Enzyme used in polymerase chain reaction is derived from which organism?

• Thermus aquaticus

• E. coli

• Bacillus subtilis

• Streptococcus pyogenes

Sodium levels in serum are regulated mainly by which hormone?

• Aldosterone

• Insulin

• ADH

• Thyroxine

Which of the following is a tumor marker for hepatocellular carcinoma?

• AFP

• CEA

• CA-125

• PSA