The primary function of the ________ is to achieve a balance in ion and osmotic concentrations on both sides of the plasma membrane
Fill in the blank(s) with correct word
sodium-potassium pump
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Small circular molecules of DNA in bacteria are called
a. plasmids. b. desmids. c. pili. d. F particles. e. transferrins.
Which of the following statements concerning calcium ions is FALSE?
a. They are involved in fertilization, blood clotting, and microtubule disassembly. b. Their concentration in the cytosol rises when Ca2+ gates open in the ER. c. Their concentration in the cytosol is usually higher than in the extracellular fluid. d. They can act by themselves, without binding to calmodulin. e. They can exert an effect after binding to calmodulin.
Where does production of sexual spores in ascomycetes occur?
a. in sporangia b. in zygospores c. in asci d. in conidiophores
What is the structure of the large polytene chromosomes found in some tissues of dipteran larvae?
What will be an ideal response?