Thalassemias are hemoglobin disorders in which the production of alpha and beta chains are out of
balance. Indicate whether the statement is true or false.
T
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All blood cells originate from the
A. erythrocyte. B. leukocytic stem cell. C. eosinophilic stem cell. D. hematopoietic stem cell.
Excess glucose is converted into glycogen in
a. the pancreas. b. the liver. c. the thymus. d. the thyroid. e. none of these.
Phospholipase C catalyzes the reaction in which:a
IP3 is converted to DAG. b. PIP2 is split. c. a protein kinase is activated. d. calcium ions are released from the ER. e. DAG is converted to PIP2.
Which of these occurs during transcription?
A) The information coded in DNA is copied into mRNA. B) A DNA copy is used to direct the production of a polypeptide. C) A polypeptide is folded into a protein. D) Messages encoded in mRNA are used to build proteins. E) Protein processing is enhanced by enzymes.