The Dlx gene encodes a transcription factor that signals clusters of embryonic cells to ____ and gives rise to an
appendage.
a. fold into the cardiac muscle
b. protrude from the body
c. form reproductive structures
d. induce apoptosis in cells lining the appendages
e. develop into the immune system
ANSWER: b
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How might a researcher best determine the location of a protein in a cell?
a. studying the amino acid sequence of the protein b. fusing a fluorescent tag to the protein to visualize its cellular location under a microscope c. attaching an antibiotic tag to the protein and determining its location using DNA microarrays d. analyzing the untranslated regions of the gene encoding the protein e. understanding the protein’s function
Explain the idea of transgenic animals as "bioreactors."
What will be an ideal response?
vitamins which are fat soluable
What will be an ideal response?
Over the past 50 years, the atmospheric level of carbon dioxide has
a. decreased. b. increased slightly. c. more than doubled. d. stayed the same