Differentiation is necessary before a cell can exchange material with its environment
Indicate whether the statement is true or false.
FALSE
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A process that requires cellular energy to move a substance against its concentration gradient is called
A) active transport. B) passive transport. C) facilitated transport. D) osmosis. E) diffusion.
Which of the following is NOT an explanation for how one gene can produce more than one protein?
A. Posttranslational methylation and phosphorylation B. Different carbohydrates bonded to the protein C. Various cuts and splices of mRNA D. Different groups of polypeptides associating to make different proteins
Which one of the following is NOT a sign of diabetes mellitus?
A) polyuria B) polydipsia C) moon face D) polyphagia E) acidosis
Which of the following combining forms refers to the tube leading from the bladder to the outside of the body?
A. ur/o B. urethr/o C. ren/o D. ureter/o