The myosin power stroke in muscle contraction is triggered when _____ is released
Fill in the blank(s) with the appropriate word(s).
ANS: Pi (inorganic phosphate)
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In the illustration, isoleucine can enter and exit the citric acid cycle at what point?
a. fumarate
b. succinyl CoA
c. acetyl CoA
d. acetoacetate
The cell walls of fungi are composed mainly of ____
a. Cellulose b. Lignin c. Chitin d. Pectin e. protein
Which of the following organisms causes "red tides" and extensive fish kills?
a) amoeba b) ulva c) diatoms d) plasmodium e) dinoflagellates
Every protein has a unique shape and function because:
A) each protein has a unique sequence of amino acids. B) the bonds between the amino acids vary from protein to protein. C) the number of nitrogen atoms in each amino acid differs. D) each protein has a unique sequence of nucleotides.