Which one of the following can contribute to a protein's tertiary structure?
A. ionic bonding
B. van der Waal's forces
C. covalent bonding
D. hydrogen bonding
E. All of these choices are correct.
Answer: E
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Chromatin consists of ____
a. only DNA b. DNA and RNA c. RNA only d. DNA and associated proteins e. proteins only in the nucleus
In what sense are studies by nineteenth-century naturalists and those by early twenty-first-century genomic biologists similar?
A) Both focused on cellular evolution. B) Both worked to understand how genes evolved. C) Both took a reductionist approach by studying only one small part of a complex system. D) Both focused on observing and describing what exists in their realms of investigation.
The reaction between carbon dioxide and water to produce carbonic acid is catalyzed by
A. phosphates. B. carbonic anhydrase. C. renin. D. aldosterone. E. calcitonin.
Pasteurization is a method used for
a. cloning b. prevent global warning c. vaccination purpose d. kill microorganisms in food