Osmotic pressure is a measure of the force needed to ________.
Fill in the blank(s) with the appropriate word(s).
stop osmosis
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Flattened sacs of internal membranes associated with photosynthesis are called
A. chloroplasts. B. photosystems. C. the stroma. D. thylakoids. E. cristae.
Which one of the following steps in translation is not part of the elongation phase?
A. movement of the ribosome three bases closer to the 3' end of the mRNA B. ejection of an uncharged tRNA from the E site of the ribosome C. peptide bond formation D. binding of initiator tRNA to AUG start codon E. introduction of a charged tRNA into an unoccupied A site of the ribosome
The carbon source for saprobes is dead organic material
a. True b. False
The structural and functional unit of nervous tissue is the
A) dendrite. B) axon. C) neuron. D) nerve.