Which of the following statements is true?
a) since all cells carry out cellular respiration they contain mitochondria.
b) a cell cannot be subdivided into smaller units that maintain the living state.
c) plant cells contain chloroplasts and no mitochondria while animal cells contain mitochondria and no chloroplasts.
d) the cell membranes function is to prevent diffusion of any substances into or out of the cell.
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You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone

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Si units are the modern form of the