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Default Repeared USMLE Questions Step 1- 367

Q- Which of the following is the main role of hydroxyurea in treatment of sickle cell anemia?
A- Decrease levels of HbF in red blood cells
B- Decrease oxygen affinity to HbS
C- Increase levels of HbF in red blood cells
D- Increase ability of HbS to bind 2.3-bisphosphoglycerate

Q- Which of the following methods is the most likely to demonstrate spores?
A- Acid-fast stain
B- Gram stain
C- India ink stain
D- Malachite green stain

Q- Paget disease of bone is characterized by which one of the following features?
A- Increase osteoblastic activity only
B- Increase osteoclastic activity only
C- Increase both osteoblastic and osteoclastic activity
D- Decrease osteoclastic activity

Answer and Explanation
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