What level of protein synthesis is represented by the coiling of the protein chain backbone into an alpha helix?
A) primary structure
B) secondary structure
C) tertiary structure
D) quaternary structure
B) secondary structure
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What is the formation of blood vessels called?
A. Anastomosis B. Hemogenesis C. Endotheliogenesis D. Angiogenesis E. Angioplasty
Chemical reactions that release energy are called ________ reactions.
Fill in the blank(s) with the appropriate word(s).
Amoeboid movement is accomplished by alternate assembly and disassembly of actin filaments
Indicate whether the statement is true or false
Fresh water vertebrates
a. are hyper-osmotic regulators. b. produce large volumes of hypotonic urine. c. maintain lower internal osmolarities in order to minimize water intake. d. are adapted to take in ions of sodium, chlorine and calcium by means of gills, chloride cells and moist skin. e. all these.