Excessive iron absorption and accumulation to toxic levels is associated with _____
A) excessive blood volume
B) a liver abnormality that results in a decreased number of red blood cells
C) various forms of inherited or acquired anemia
D) the genetic disorder known as hemochromatosis
E) menstruation and menopause
Answer: D
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The very first level of packaging eukaryotic DNA is the:
A. 30-nm chromatin fiber. B. nucleosome. C. beads on a string. D. both the 30-nm chromatin fiber and beads on a string. E. None of the answer options is correct.
About how often have catastrophic destructions of the magnitude of the end-Cretaceous bolide impact occurred?
A) at intervals of a billion years B) at intervals of 10 to 100 million years C) at intervals of 10 to 100 thousand years D) only once
The human genome
A. has a lot of foreign DNA scattered throughout the genome, including transposons. B. has a very small amount of foreign DNA, mostly in the end caps (telomeres) of chromosomes. C. has a lot of foreign DNA, mostly in the end caps (telomeres) of chromosomes. D. has no foreign DNA because it is excised by DNase.
Light that enters the eye passes through the following structures in the following order:
A. Ganglion Cell Layer - Inner Nuclear Layer - Outer Nuclear Layer - Rods & Cones B. Ganglion Cell Layer - Outer Nuclear Layer - Inner Nuclear Layer - Rods & Cones C. Inner Nuclear Layer - Ganglion Cell Layer- Outer Nuclear Layer - Rods & Cones D. Rods & Cones - Inner Nuclear Layer - Outer Nuclear Layer - Ganglion Cell Layer E. Rods & Cones - Outer Nuclear Layer - Inner Nuclear Layer - Ganglion Cell Layer