Match the following descriptions with the specific type of cellular junction listed below. Descriptions may be used more than once or not at all
a. junctions that anchor cells to one another or the ECM
b. junctions that permit communication between cells
c. junctions that form a seal or a barrier between cells
d. junctions that anchor cells to other cells
e. junctions that anchor cells to the extracellular matrix
1. Adherens junctions
2. Tight junctions
3. Gap junctions
4. Desmosomes
5. Plasmodesmata
6. Hemidesmosomes
What will be an ideal response?
1. Adherens junctions d
2. Tight junctions c
3. Gap junctions b
4. Desmosomes d
5. Plasmodesmata b
6. Hemidesmosomes e
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You cut some sheep DNA and some plasmid DNA with the same restriction enzyme. The plasmid contains an AmpR gene and a lacZ gene. You mix together the fragments of sheep DNA and the linearized plasmid. You transform bacteria with your mixture, and plate the bacterial cells on growth media containing the antibiotic ampicillin and X-gal (the substrate of beta-galactosidase). You need to pick some bacterial colonies that contain recombinant plasmids. Which colonies do you choose?
A. any colony; if they grow on the media they are recombinant. B. the white colonies; only cells that contain a recombinant plasmid will be white. C. the blue colonies; any cells containing eukaryotic (sheep) DNA will be blue. D. the large colonies; large colonies are more resistant to the antiobiotic and thus more likely to contain a recombinant plasmid. E. any colony, all colonies will contain plasmids; it requires additional testing to determine if the plasmid is recombinant.
What feature of a dinosaur determines whether it is a saurischian or an ornithischian dinosaur?
a. size b. habitat c. feeding preference d. pelvic bone structure e. number of feet it walks on
What class do sea cucumbers belong?
a. Chordata b. Echinoidea c. Hemichordata d. Holothuroidea e. Urochordata
Chagas disease is treated with chloroquine.
Answer the following statement true (T) or false (F)