After a cookie has been eaten and digested, sugar molecules enter bloodstream by process of
a. active transport
b. diffusion
c. excretion
d. cellular respiration
Answer: b. diffusion
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Choose the description below that best matches the current model of RNA polymerase holoenzyme.
A. A core enzyme composed of five sigma factors bound by a polypeptide chain. B. A core enzyme composed of five polypeptides bound by ribosomes. C. An open complex or "bubble" formed by DNA, mRNA, and RNA polymerase. D. A core enzyme composed of five polypeptides bound by a transcription factor.
Entropy is a measure of
A. order. B. kinetic energy. C. potential energy. D. disorder. E. complexity.
Fill in the blanks to complete the following statements. Bacteria can produce __________ that are highly resistant forms of the organism that develop in response to adverse environmental conditions
Fill in the blank(s) with correct word
Protein deficiency tends to cause edema because __________.
a. blood pressure rises, pushing fluid out of the capillary b. a decrease in plasma protein levels reduces the osmotic force driving fluid into the capillary c. a rise in angiotensin promotes vasoconstriction d. activation of the parasympathetic nervous system