LQB186 question AND ANSWERS combined| VERIFIED
Four major classes of organic cellular molecules Correct Answer:
Carbohydrates, Lipids, Proteins, Nucleic acid
the monomers of proteins are Correct Answer: amino acids
the monomers of proteins are joined in (...) to form a polymer that is called (...)
Correct Answer: Linear Chain, polypeptide
three sentences about the R group Correct Answer: 1. 20 different R-groups =
20 different amino acids
2. Side chain that determine folding and charge
3. Polarity
Why cysteine is an interesting amino acid? Correct Answer: Important for
folding protein. Also 2 cysteines group to form a disulphide group.
What are the four levels of protein structure? Correct Answer: 1. Primary-
simple chains
2. Secondary-helical or pleated
3. Tertiary-complexly folded
4. Quaternary-more than one chain
3 things that alter protein conformation? Correct Answer: 1. Actual sequence of
amino acids
2. Conditions of the proteins environment
3. presence or absence of co-factors, co-enzymes
Why does DNA have a negative charge? Correct Answer: presence of
phosphate groups in nucleotide
Basic proteins are organic molecules because they contain ...,... and ... but they
also contain ... and .... Correct Answer: Carbon, Hydrogen, oxygen, nitrogen,
sulfur
When thinking about enzymes the ... binds to the ... site on the enzyme and is
converted into the ... that are then released. Correct Answer: Substrate, active,
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