You are working for the Environmental Protection Agency and researching the effect of a potentially toxic chemical in drinking water. There is no documented scientific evidence showing that the chemical is toxic, but many suspect it to be a health hazard. Using the precautionary principle, what would be a reasonable environmental policy?

#Question id: 685

#Unit 1. Molecules and their Interaction Relevant to Biology

A protein has a molecular weight of 5600 daltons; its subunits are about 1960 daltons. There are ________ protein chains per oligomer.

#Question id: 686

#Unit 1. Molecules and their Interaction Relevant to Biology

Which is not an example of an oligomeric protein?

#Question id: 687

#Unit 1. Molecules and their Interaction Relevant to Biology

All of the following are considered “weak” interactions in proteins, except:

#Question id: 688

#Unit 1. Molecules and their Interaction Relevant to Biology

Pauling and Corey’s studies of the peptide bond showed that:

#Question id: 689

#Unit 1. Molecules and their Interaction Relevant to Biology

In the diagram below, the plane drawn behind the peptide bond indicates the:   

A) absence of rotation around the C—N bond because of its partial double-bond character.

B) plane of rotation around the Ca—N bond.

C) region of steric hindrance determined by the large C=O group.

D) region of the peptide bond that contributes to a Ramachandran plot.

 Which of the following best represents the backbone arrangement of two peptide bonds?

#Question id: 690

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following pairs of bonds within a peptide backbone show free rotation around both bonds?