Why do some scientists believe that RNA was the first information storage molecule?
a. because some viruses use RNA as their information storage molecule
b. because RNA can be a catalyst as well as an information storage molecule
c. because amino acids cannot form peptide bonds without ribosomes to catalyze their
formation
d. because RNA is a less stable molecule than DNA
e. because proteins are made of far more amino acid monomers (over 20) than RNA (4)
B
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Glucose has a chemical formula of C6H12O6. Would glucose be considered a hydrocarbon?
a. Yes, hydrocarbons are organic molecules with any hydrogen and carbon. b. No, hydrocarbons are organic molecules with equal amounts of carbon and hydrogen. c. No, hydrocarbons are organic molecules consisting entirely of carbon and hydrogen. d. Yes, hydrocarbons are organic molecules with a mix of polar covalent and ionic hydrogen and carbon.
Given the following plasmid, what are the sizes of the fragments you would expect from an XhoI digest?
What will be an ideal response?
The ? helix and ? pleated sheet represent which level of protein structure?
A. primary structure B. secondary structure C. tertiary structure D. quaternary structure E. pentiary structure
Compare and contrast ionic bonds, covalent bonds, polar covalent bonds, and hydrogen bonds. Explain how valence electrons are involved in the formation of each
What will be an ideal response?