What is the rate-limiting enzyme in heme synthesis?
AALA synthase
BHMG CoA reductase
CALA dehydratase
DUroporphyrinogen 1 synthase
A patient's relatives sent a message on social media to the consulting doctor, mentioning that the patient's urinary coproporphyrin test is positive. What is the probable cause?
ALead poisoning
BAsbestosis
CSilicosis
DMercury poisoning
EArsenic poisoning
Which of the following statements about hemoglobin is true?
AEach hemoglobin molecule can bind up to six O2 molecules.
BEach hemoglobin subunit contains two heme groups, which bind oxygen.
CHemoglobin consists of two alpha and two beta subunits, each capable of binding one O2 molecule.
DEach hemoglobin molecule is made of 6 polypeptide chains.
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