In order for macromolecules to form, smaller molecules must be concentrated. All of the following have been proposed as ways for concentrating organic molecules EXCEPT?
A. Organic molecules could have collected on the surface of clay particles.
B. Organic molecules could have been concentrated when they were trapped in small basins and the water evaporated.
C. Organic molecules could have made copies of themselves and this resulted in concentrations of molecules.
D. Organic molecules could have been concentrated when water froze.
C. Organic molecules could have made copies of themselves and this resulted in concentrations of molecules.
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Fetal hemoglobin is hemoglobin that consists of two gamma chains and ________.
A) two alpha chains B) two beta chains C) two zeta chains D) two epsilon chains
What is an increase in alveolar ventilation to match the demands of increased metabolic activity in the cells called?
A) hypoventilation B) hyperventilation C) hyperpnea D) dyspnea E) hypopnea
Vesicles that carry proteins from the rough ER to the Golgi apparatus bud off as _______ vesicles.
a. uncoated b. clathrin-coated c. COPI-coated d. COPII-coated
Which statement is true about the relationship between viral infection and cancer?
a) Any virus type can cause cancer if it infects the "right" cell type b) Only people with compromised immune systems get cancer from viral infection c) About one fifth of all cancer types can be linked to viral infection d) Tumors that arise from viral infection never become malignant