Which of the following does NOT dispose of a type of waste directly to the environment?
a. digestive system
b. respiratory system
c. integumentary system
d. circulatory system
e. urinary system
D
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During glycolysis, ATP is produced when 1,3 bisphosphoglycerate transfers a phosphate to ADP forming ATP. This is an example of
A. glycolytic phosphorylation. B. substrate-level phosphorylation. C. photophosphorylation. D. oxidative phosphorylation.
Translation begins when the initiator tRNA binds to
a. the large ribosomal subunit. b. the small ribosomal subunit. c. the second tRNA. d. the terminator codon. e. the first codon of the mRNA.
Animal cells typically achieve cytokinesis by:
A. forming a cell plate across the middle of the cell. B. chromosome condensation. C. chromosome elongation. D. binary fission. E. forming a cleavage furrow that pinches the cell into two.
An atom has 20 electrons and 20 neutrons. What is the mass of this atom?
A. 20 B. 10 C. 40 D. 80