Which of the following reads the nucleotide sequence of a gene and synthesizes the corresponding primary transcript?
A) DNA polymerase.
B) RNA polymerase.
C) ribosome.
Ans: B) RNA polymerase.
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Which event of fertilization occurs first?
A. fast block to polyspermy B. the entry of sperm DNA into the egg C. the slow block to polyspermy D. the acrosomal reaction E. the cortical reaction
________ is the mechanism by which some organisms, such as Komodo dragons, can develop eggs into zygotes without the need of sperm.
Fill in the blank(s) with the appropriate word(s).
In terrestrial and shallow-water ecosystems, the grazing food chain is dominant over the detrital food chain
Indicate whether the statement is true or false
How are sister chromatids connected to each other?
A. through the centrioles B. through cohesion proteins C. through complementary base pairing of DNA at the centromere D. through centromere proteins that are attracted to each other by opposite charges E. through activated cyclin/CDK complexes