Prokaryotes have a –10 and –35 consensus sequence in their promoter. What are the three eukaryotic promoter sequence elements (or "boxes")?
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GC-rich, CAAT, and TATA boxes
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There are ____________________ chromosomes in a human tetraploid cell
Fill in the blank(s) with correct word
Which of the following would be a modern
example of Lamarckianism? a. A strain of houseflies resistant to insecticides emerges. b. Squirrels separated by a river are found to be unable to interbreed. c. A son is born with a portion of his right index finger missing--the same portion that was severed from his father's hand in an accident. d. A strain of houseflies resistant to insecticides emerges, and squirrels separated by a river are found to be unable to interbreed. e. A strain of houseflies resistant to insecticides emerges; squirrels separated by a river are found to be unable to interbreed, and a son is born with a portion of his right index finger missing--the same portion that was cut off from his father's hand in an accident.
In mammals, an egg fertilized by one sperm divides repeatedly (1-2-4-8-16-32-64, etc.). At the 64-cell stage, only three cells go on to become the embryo while 61 grow to become the fetal side of the placenta. In plants, fertilization likewise results in the development of an embryo and nourishing endosperm. However, how does this process differ from the mammal embryo and placenta?
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The contraction of skeletal muscles is based on _____
A) myosin filaments coiling up to become shorter B) actin and myosin filaments both coiling up to become shorter C) actin cross-bridges binding to myosin and transitioning from a high-energy to a low-energy state D) myosin cross-bridges binding to actin and transitioning from a high-energy to a low-energy state