Which protein is needed to lay down a segment of RNA complementary to the DNA before replication can begin?
A) RNA polymerase II
B) primase
C) helicase
D) topoisomerase
E) ligase
B) primase
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In a hypothetical study, equal numbers of marked dark and light moths are released in polluted and unpolluted woodlands and recaptured 10 days later. According to the industrial melanism hypothesis, which of the following results is unexpected?
A. More marked dark moths should be recaptured in polluted woodlands than in unpolluted woodlands. B. Fewer marked light moths should be recaptured in polluted woodlands than in unpolluted woodlands. C. Fewer marked dark moths should be recaptured in unpolluted woodlands than in polluted woodlands. D. More marked light moths should be recaptured in unpolluted woodlands than in polluted woodlands. E. Fewer unmarked dark moths should be captured in polluted woodlands than unmarked light moths.
Which of the following explains the difference between VNTRs and RFLPs?
A. In VNTRs, we are looking at sequence differences in genes; in RFLPs we are looking at sequence differences in noncoding DNA. B. In VNTRs, we are looking at sequence differences in noncoding DNA; in RFLPs we are looking at sequence differences in genes. C. In VNTRs, we are looking at the number of times a sequence is repeated; in RFLPs we are looking at size differences resulting from different restriction sites being present. D. In VNTRs, we are looking at size differences resulting from different restriction sites being present; in RFLPs, we are looking at the number of times a sequence is repeated.
What kind of a biomolecule is ricin?
a. protein b. lipid c. nucleic acid d. carbohydrate e. none of these - it is an inorganic mineral
Protobionts are vesicle-like assemblages of abiotically-produced organic polymers
______________ Indicate whether the statement is true or false.