The molecules responsible for membrane transport are
A) steroids.
B) phospholipids.
C) carbohydrates.
D) proteins.
Answer: D
You might also like to view...
In mutualism
A. the mutualist is dependent on the host. B. the partners will not survive separately in many cases. C. a reciprocal benefit accrues to both partners. D. All of the choices are correct.
Using phase contrast microscopy on a wet mount of live cells, you observe motile bacilli moving rapidly and randomly through the field of view, changing directions after a brief tumble and taking off in a different direction
These cells are exhibiting ________ motility. A) twitching B) swimming C) gliding D) twitching or gliding
When a small amount of hydrochloric acid (HCl) is added to a solution of Na2HPO4, the pH of the solution does not
change markedly. The pH also does not change drastically when a small amount of sodium hydroxide (NaOH) is added to this same solution. Based on these observations, the compound Na2HPO4 is: a. acting as a buffer. b. acting as a solvent. c. able to donate hydrogen atoms to HCl. d. able to remove hydrogen ions from the OH? of NaOH. e. an enzyme facilitating the reaction between HCl and NaOH.
The plant photoreceptor phytochrome is important for which of the following?
a. photomorphogenesis b. photorespiration c. growth d. photosynthesis