Which statement about enzymes is not true?
A.) enzymes can help build large polymers
B.) enzymes reduce the activation energy required to initiate a spontaneous reaction
C.) an enzyme can force an energetically unfavorable reaction to take place inside the cell
D.) enzymes can speed up energetically favorable reactions
Ans: C.) an enzyme can force an energetically unfavorable reaction to take place inside the cell
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Histone proteins
A) are male sex hormones. B) are inert spool-like structural supports around which DNA winds. C) control gene expression through chemical interactions that expose parts of the DNA to transcription factors, while shielding other parts. D) bind to mRNAs, preventing their translation into protein.
Classical conditioning and operant conditioning differ in that they apply, respectively, to ____ and ____ behavior
a. voluntary; involuntary b. involuntary; voluntary c. instinctive; learned d. learned; instinctive e. active; passive
Members of the phylum __________ are the simplest organisms that have a separate mouth and anus
A. Platyhelminthes B. Ctenophora C. Cnidaria D. Porifera E. Placozoa
Which of the following inaccurately represents normal forces across capillary walls?
A) Interstitial fluid oncotic pressure is almost zero. B) At rest, net filtration occurs across capillary walls. C) Interstitial fluid hydrostatic pressure increases from arteriole end to venous end. D) Capillary hydrostatic pressure decreases from arteriole end to venous end. E) Capillary oncotic pressure is due primarily to plasma proteins.