What is the definition of osmosis?
A) The movement of molecules down their concentration gradient
B) The movement of salt molecules across a semipermeable membrane
C) The diffusion of water molecules across a semipermeable membrane
D) The movement of molecules against their concentration gradient
C) The diffusion of water molecules across a semipermeable membrane
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Postranscriptional modification to remove introns is needed for the bacterial RNA that has codon, rather than anticodon, sequences.
Answer the following statement true (T) or false (F)
Dorothy suffered a serious stroke that destroyed neurons in the swallowing center of her brain. This damage to her brain would prevent _____.
A. mastication B. secretion of saliva C. peristalsis D. elevation of the soft palate E. bolus formation by her tongue Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about swallowing? What other information is related to the question? Choose Answer · Given what you now know, what information is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The phenotype of an organism is:
a) its physical characteristics. b) the form it achieves as an adult. c) its genetic make-up. d) the embryonic expression of its genes. e) a hypothesis of its evolutionary origins.
A site of negative genetic regulation where binding by repressor blocks transcription is the
A. operator. B. promoter. C. repressor. D. CAP. E. operon.