The sodium–potassium pump is a carrier protein that maintains a(n) ____ gradient across the plasma membrane
a. polar
b. nonpolar
c. phosphorous
d. concentration
e. electrochemical
e
You might also like to view...
The importance of crossing over during meiosis is
a. to hold homologous pairs of chromosomes together. b. to result in chromosomes consisting of two identical sister chromatids. c. to result in daughter nuclei with too much or too little genetic material. d. to ensure that the developing zygote receives cytoplasm from one of the parents. e. to allow formation of parental chromosomes.
A diet rich in ___ has been shown to reduce the incidence of spina bifida
A. vitamin C B. niacin C. folate D. vitamin D E. vitamin E
Usually, the first procedure a genetic counselor performs for a client is
A. amniocentesis or CVS. B. taking a karyotype. C. biochemical testing. D. constructing a pedigree. E. ultrasonic imaging.
Carotenoids are important to many plants because these pigments are able to:
A. remove carbon dioxide from the air B. absorb violet and blue-green wavelengths of light that are not absorbed by chlorophyll C. absorb water so that hydrolysis can be carried out in the chloroplasts D. store electrons for use during the "dark" reaction of photosynthesis E. capture UV radiation that is harmful to the DNA in the nucleus of plant cells