RNA in cells can serve as a
a. storage form of genetic information in nuclei.
b. carrier of information from the nucleus to the cytoplasm.
c. catalyst or enzyme.
d. Both b and c
Ans: d. Both b and c
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The scientist credited with the discovery of DNA, which he called "nuclein," from salmon sperm in 1869 is
A) Johann Friedrich Meischer. B) Eduard Zacharias. C) Fredrick Griffiths. D) Martha Chase. E) Oswald Avery.
A DNA sequence can be patented if
A) two or more people isolate the same sequence successfully. B) it forms a single gene. C) it has economic implications. D) it is useful as a tool for research or as a novel or improved product.
Adjacent plant cells utilize ____ to rapidly communicate with each other
a. gap junctions b. plasmodesmata c. transport proteins d. desmosomes e. neurotransmitters
Most fungal spores are ____ reproductive cells that are produced ____
a. motile; sexually only b. motile; asexually only c. nonmotile; sexually only d. nonmotile; asexually only e. nonmotile; sexually or asexually