Which one of the following is not an example of combinatorial control of eukaryotic gene expression?
A. The HAT activity of the yeast Gcn5 protein alters chromatin structure.
B. Fos-Jun heterodimers bind DNA with higher affinity than Fos-Fos or Jun-Jun homodimers.
C. Two regulatory proteins that form homo- and heterodimers bind to three different regulatory sites.
D. Expression of the even-skipped gene product of the fruit fly is differentially controlled by the uneven distribution of four transcription factors.
A
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From what organism can green fluorescent protein (GFP) be isolated?
What will be an ideal response?
Molecular studies point to the order Zygnematales, whose modern representatives include ____, as the sister clade of all
land plants.
a. Equisetum b. Plasmodium c. Marchantia d. Spirogyra e. Giardia
A prenatal diagnosis procedure that has recently
come into wide use can be performed earlier than amniocentesis, and it involves sampling the a. yolk sac material. b. allantois. c. chorion. d. yolk sac. e. umbilical cord.
Which embryonic tissue is incorrectly associated
with its derivative? a. skin; mesoderm b. nervous system; ectoderm c. liver; endoderm d. circulatory system; mesoderm e. brain; ectoderm