Differentiation is the process by which cells
a. mature into larger cells.
b. change from one type of muscle to another.
c. change to repair injuries.
d. turn on all the genomic genes.
e. express different subsets of their genes during development..
ANSWER: e
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In fungi, food materials are digested
a. within the food vacuole. b. outside the body. c. intracellularly. d. by the mitochondria. e. by the host organism
In a chemical reaction, the standard free energy change (?G°') is calculated to be 3.67 cal/mol. What can be said of the chemical reaction?
A) The reaction is at equilibrium under standard conditions. B) The reaction goes spontaneously to the right under standard conditions. C) The reaction is not spontaneous under standard conditions. D) Products predominate over reactants at equilibrium under standard conditions. E) There can be no reaction.
One consequence of the lack of introns in bacterial genes is that
A) exons are eliminated during transcription. B) a 5' cap and poly (A) tail can be added immediately. C) bacterial proteins are very short and not subject to mutation. D) translation can begins before transcription is complete because prokaryotes do not have a nucleus. E) integrated viral DNA is not recognized for transcription.
The MMR (measles, mumps, rubella) vaccine requires multiple immunizations in the first year because it is composed of whole killed viruses
Indicate whether the statement is true or false