The inherited disease in which hemoglobin molecules clump into long fibers, changing the shape of the blood cells is
a. Klinefelter's syndrome
b. sickle cell disease
c. Huntington's disease
d. cystic fibrosis
Ans: b. sickle cell disease
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What is the process component of the theory of chemical evolution?
A) Acid-base reactions resulted in the formation of large, complex organic molecules. B) Kinetic energy was transformed into chemical energy. C) During polymerization reactions, hydrolysis was completed with condensation. D) The process occurred at black smokers, in the atmosphere and oceans, or in outer space.
The genetic engineering of human-animal hybrids is a routine procedure related to assisted reproductive technologies
a. True b. False Indicate whether the statement is true or false
ADH alters reabsorption in target cells by affecting
a. countercurrent flow in the loop of Henle. b. active transport mechanisms involving chloride ions. c. self-assembly of aquaporin subunits. d. thirst-center osmoreceptors. e. cerebral cortex signals that stimulate fluid intake.
RNA splicing removes ________________________ from the mRNA while keeping the __________________.
Fill in the blank(s) with the appropriate word(s).