The cells of prokaryotic organisms lack a _______.
Fill in the blank(s) with the appropriate word(s).
Ans: Nucleus
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Cholesterol is essential for keeping cell membranes from thickening
Indicate whether the statement is true or false.
Based on what is known about FOXP2, could Neandertals speak?
A. Yes, they had the same FOXP2 mutation as humans. B. No, they had the same FOXP2 mutation as humans. C. No, they had the same FOXP2 sequence as chimpanzees. D. Yes, they had the same FOXP2 sequence as both humans and chimpanzees. E. Yes, they had the same FOXP2 sequence as chimpanzees.
A change in a cell's DNA sequence is
A. replication. B. transcription. C. a mutation. D. translation. E. an operon.
What types of molecules may NOT need transport proteins to be able to cross cytoplasmic membranes?
A) large molecules B) ions C) small hydrophobic molecules D) small hydrophilic molecules E) nothing crosses cytoplasmic membranes without transport proteins