The Pribnow box of E. coli ________.
A. is centered between 7 and 13 bp upstream of the start codon
B. is located at the site of addition of poly (A) in eukaryotic mRNAs
C. is centered approximately 10 bp upstream of the start site of transcription
D. is centered approximately 35 bp upstream of the start site of transcription
Answer: C
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Acute bacterial endocarditis differs from subacute bacterial endocarditis in the
A. suddenness and severity of onset. B. population affected. C. resultant damage. D. development of exotoxin shock.
The protein pump that lowers the PH to 2 in the primary lysosome starts working in:
a. Medial face of the Golgi b. Trans face of the Golgi c. Before clathrin recycles d. After clathrin has been recycled e. None of the above
Crossing over is more likely to separate genes on a chromatid if they are Select one:
a. recessive genes. bc. close together. d. dominant genes. e. mutated genes.
What pattern of cleavage is characteristic of mammals?
A. Holoblastic cleavage with eggs containing very little yolk, but with the inner cell mass distributed uniformly B. Some yolk, and cleavage resulting in vegetal and animal poles C. Holoblastic cleavage with eggs containing little or no yolk D. Holoblastic cleavage with eggs containing very little yolk, but with the inner cell mass concentrated at one pole E. Meroblastic cleavage with eggs containing almost entirely yolk