Which of the following characteristics of eukaryotic gene expression regulation is also true in bacteria?
A. Posttranscriptional regulation is prominent because transcription is separated from translation in space and time.
B. Transcriptional activation is associated with changes in chromatin structure.
C. Many genes are regulated at the level of transcription initiation.
D. The transcriptional ground state is restrictive.
C
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Transcription is terminated in prokaryotes by ____
a. generation of a stop codon b. transcription of an mRNA terminator sequence c. splicing introns out and pasting exons together d. generation of a guanine cap e. generation of a poly-A tail
In its travel through the human body, blood usually continues on from capillaries to enter:
a. arterioles b. venules c. arteries d. veins e. other capillaries
On which continent would you have seen the very earliest members of Homo sapiens?
A) Europe B) Asia C) Africa D) Australia
Diapedesis is the movement of white blood cells through intact blood vessel walls into surrounding body tissue. It typically happens when an area of the body is injured or damaged, and an inflammation response is required. What role would you expect cell adhesion molecules to play in this process?
A. Cell adhesion molecules help white blood cells adhere to the blood vessel wall so that they can migrate across the wall and infiltrate into the underlying tissue. B. Cell adhesion molecules will allow the white blood cells to cling to one another to form a migrating clot. C. Cell adhesion molecules will allow the white blood cells to attach to the injured area so they become immobile.