The purpose of a mordant in the Gram stain is to
A) remove the simple stain.
B) make the bacterial cells larger.
C) make the flagella visible.
D) prevent the crystal violet from leaving the cells.
E) make gram-negative cells visible.
D
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The starch production center within many algal cells is the
a. nucleus. b. cytoplasm. c. stipe. d. pyrenoid.
What protein, released by cytotoxic T (TC) cells, perforates a target cell's plasma membrane so that enzymes can enter and fragment the target cell's DNA?
What will be an ideal response?
How are parasitoids different from typical brood parasites?
a. they are usually not insects b. they affect only plants c. they lay eggs inside a host, which is eventually killed d. they fool another species into caring for their young e. they usually only affect the eggs of birds
When making a complementary DNA (cDNA) library, which enzyme is used to copy mRNA into DNA?
A) DNA ligase B) DNA polymerase C) Primase D) RNA polymerase E) Reverse transcriptase