____________________ have two binding sites for tRNA to allow the formation of peptide bonds. Fill in the blank(s) with the appropriate word(s)
ANS: Ribosomes
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According to studies by Norman Terry and coworkers, some plants can perform a version of
bioremediation of selenium in wastewater by
a. converting selenium to a form that kills waterfowl. b. using selenium to make a necessary supplement for humans. c. converting selenium into a relatively nontoxic gas. d. storing selenium in the soil. e. increasing the selenium concentration in the water.
The DNA of an organism is made up of subunits called ________.
A. histones B. amino acids C. polymerases D. mRNA E. nucleotides
Rigor mortis occurs when ____
a. ATP levels fall b. calcium levels rise c. potassium levels fall d. acetylcholine stimulates contraction e. ADP is produced
The p21 and p15 proteins are examples of
a. Cdk inhibitors. b. cyclins. c. oncogenes. d. growth factors.