Which statement describes an atom of oxygen?
A) Most naturally occurring atoms of oxygen contain 9 neutrons.
B) All atoms of oxygen include 8 protons.
C) Nitrogen-15 is an isotope of oxygen.
D) Its atomic weight is the same as its atomic mass.
E) Its chemical symbol is Ox.
B) All atoms of oxygen include 8 protons.
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Unlike pinnipeds, sirenians are completely free from the terrestrial environment
Indicate whether the statement is true or false
Gamete formation ____
Which event occurs during the elongation
stage? a. Peptide bonds form. b. Free amino acids bind to the mRNA binding site. c. Anticodons bind to complementary codons. d. A STOP codon enters the ribosome. e. Peptide bonds form, and anticodons bind to complementary codons
Of the twenty amino acids available for protein synthesis, how many must be obtained by dietary means?
a. 0 b. 2
c. 4 d. 8 e. 10