Why are some people concerned about hormones in cattle feed?
What will be an ideal response?
All vertebrate hormones are similar, and there are concerns that extra hormones from the feed may transfer to those people who eat the meat.
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Which of the following proteins is observed exclusively in association with prokaryotic DNA replication?
A) DNA polymerase I B) primase C) helicase D) single-strand binding proteins E) telomerase
The portion of the DNA molecule that is ultimately translated is composed of
a. introns. b. anticodons. c. exons. d. transcriptions. e. regulatory proteins.
Describe experiments using marker molecules that have been done to elucidate important properties of (1) tight junctions and (2) gap junctions,
and propose one additional experiment you could do with each junction to gain a greater understanding of that junction's properties. What will be an ideal response?
Sexual reproduction reorganizes genetic material but doesn't create it; how does new genetic information appear in a population?
A) from the fusion of chromosomes from two individuals B) from chromosome-sorting errors in mitosis C) permanent changes, called mutations, alter the molecular structure of a gene D) from the pairing and sorting of different alleles E) from the union of two gametes, each produced within a separate individual