Which of the following is NOT a reason why eukaryotic gene regulation is more complicated than
prokaryotic gene regulation?
a. Eukaryotic DNA is sequestered in the nucleus.
b. Eukaryotic DNA is complexed with histones.
c. Eukaryotic transcription is completed before translation begins.
d. Multicellular eukaryotic organisms produce many different types of cells.
e. Eukaryotic regulatory sequences are scattered throughout the genome.
E
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Nondisjunction of X chromosomes may occur during meiosis 1 of oogenesis to form 2 types of eggs. If normal sperm fertilize these two types of egg, which of the following are possible sex chromosome complements?
A. XX and XY B. XYY and XO C. XYY and YO D. XXY and XO E. XXX and XYY
During the cleavage stage of glycolysis, fructose-1, 6 biphosphate is broken down into
A. two molecules of ATP. B. citric acid. C. two molecules of glyceraldehyde-3-phosphate. D. two molecules of pyruvate. E. glucose.
The openings in the exoskeleton of arthropods that allow oxygen into highly branched internal tubules that reach individual body cells are
A. spicules. B. alveoli. C. tracheae. D. spiracles. E. gills.
The range of a population
A. changes over time due to external events. B. is stable and almost never changes. C. only changes after a disaster has wiped out a former range. D. is very fluid and changes frequently in a random fashion. E. only changes due to iteroparity.