Organs that come into contact with the environment are lined with which type of tissue?
Answer: Epithelial
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What is the correct progression of steps for a direct-sequencing experiment?
A) Lyse cells, purify DNA, amplify genes by PCR, and insert genes into plasmid. B) Lyse cells, insert genes into plasmid, purify DNA, and amplify genes by PCR. C) Lyse cells, insert genes into plasmid, amplify genes by PCR, and purify DNA. D) Purify DNA, amplify genes by PCR, lyse cells, and insert genes into plasmid.
As a result of calcium pumps, calcium concentrations are typically higher outside cells than in the cytosol
Indicate whether the statement is true or false.
A procedure that divides organisms into two or more groups depending on their individual reactions to the same staining procedure is referred to as ________ staining.
Fill in the blank(s) with the appropriate word(s).
The immune system uses which of the following mechanisms to generate antigen receptor diversity?
a. stepwise rearrangements of Ig-encoding genes b. rearrangement of heavy- and light-chain genes in B cell development c. somatic recombination d. all of the above