The secondary structure of a peptide backbone is stabilized by forming either a(n) or a(n) .

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

The carrier molecules of the electron transport system are located in the

What are levels of ecology and how can we remember them