The plasma membrane gets new lipids from:
a. The lumen of the ER.
b. The lumen of the Golgi apparatus.
c. Making new lipids at the plasma membrane.
d. The nucleus.
e. None of the above.
Answer: e. None of the above.
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Sulfonamides and other drugs that inhibit folic acid synthesis have a high therapeutic index because
A. humans synthesize folic acid by a process that is not sensitive to sulfonamides. B. humans do not use folic acid. C. humans do not synthesize folic acid but obtain it in their diets. D. None of these are correct.
Which sentence best describes the general reproductive strategy of flowering plants?
a. They reproduce only sexually. b. They mainly reproduce sexually, although many will reproduce asexually under certain circumstances. c. They reproduce only asexually. d. They mainly reproduce asexually, although many will reproduce sexually under certain circumstances.
Which of the following statements is NOT true about alternation of generations life cycle?
a) Spores develop into the gametophyte generation. b) When the sperm fertilizes the egg, a zygote results that develops into the sporophyte. c) The gametophyte produces eggs and sperm. d) Meiosis produces spores that are haploid. e) The sporophyte generation produces spores by mitosis in structures called sporangia.
The miRNAs in a cell inhibit protein synthesis by forming complementary bonds with rRNA
Indicate whether the statement is true or false