A polypeptide chain is composed of:
a. amino acids
b. proteins
c. nucleic acids
d. fatty acids
e. monosaccharides
a
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If scientists want to develop plants better adapted to certain climates they need information about the plant's ability to:
A. bind membrane proteins B. transport solutes passively C. make dehydrins D. take up minerals E. transport calcium
Most or all protist cells have
a. a nucleus. b. a cytoskeleton. c. larger ribosomes than those of prokaryotes. d. mitochondria, ER, and Golgi bodies. e. all of these.
Vaccines typically can use any of the following EXCEPT
A) killed microbes or microbe parts. B) live, attenuated microbes. C) live, virulent microbes. D) genetically engineered microbes.
Suppose that in DNA sequence comparisons of a homologous region in various species, the region shows a low level of polymorphism. What could account for this?
What will be an ideal response?