The macromolecule that can accomplish the widest range of biological functions are
A. carbohydrates.
B. proteins.
C. nucleic acids.
D. lipids.
E. glycolipids.
B. proteins.
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Auxins lengthen coleoptiles, shoots, and roots by
promoting cell __________. Fill in the blank(s) with the appropriate word(s).
Two-dimensional gel electrophoresis separates
A) DNA fragments based on nucleotide sequence and fragment length. B) proteins based on affinity for the gel matrix and size of each protein. C) genomes based on size and structure (linear or circular) of each genome. D) RNA based on the charge and size of each RNA molecule. E) proteins based on the charge and size of each protein.
Parabasilids are excavates that lack functional mitochondria and lack a Golgi complex
_______________ Indicate whether the statement is true or false.
The only known source of human embryonic stem cells is:
a. placental tissue. b. umbilical cords. c. early human embryos. d. brain tissue. e. nerve tissue.