Sickle cell anemia is a condition in which red blood cells of patients exhibit a characteristic "sickle" shape. This arises from a mutation or change in one of the amino acids found in hemoglobin. Knowing this, what level of protein structure is most directly affected by this single amino acid mutation?
A. primary
B. secondary
C. tertiary
D. quaternary
E. None of the choices are correct.
A. primary
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What mutations occurred in typical icefish that prevented production of hemoglobin?
A. fragmentation of both the alpha and beta genes B. deletion of the alpha gene and fragmentation of the beta gene C. deletion of both the alpha and beta genes D. fragmentation of the alpha gene and deletion of the beta gene E. destruction of red blood cells in the bone marrow
The suffix -itis means ________.
A. blood B. a disease or morbid process C. pertaining to D. tumor E. an inflammation
Where would the blood be most viscous (least fluid) as it passes through the kidney?
Select one: a. before the glomerulus b. after passing through the glomerulus but before reaching the loop of nephron c. after the loop of nephron d. equally viscous at all points in the human body, including the kidney nephrons e. in the renal vein
Which characteristic promoted the utilization of lipids as the first cell membrane?
A) spontaneous degradation of the intracellular environment B) self-assembly into a simple membrane C) ability to form an impermeable membrane D) formation of a semi-solid membrane