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