#Question id: 882
#Unit 1. Molecules and their Interaction Relevant to Biology
Choose correct statements about thermophilic proteins
I. The proteins found in thermophilic species are much more stable than their mesophilic counterparts.
II. All thermostable proteins have such a high incidence of salt bridges
III. the most important of which are an increased size of the protein’s hydrophobic core, an increased size of the interface between its domains and/or subunits, and a more tightly packed core as evidenced by a reduced surface-to-volume ratio.
IV. Several of these thermostable enzymes have a superabundance of salt bridges on their surfaces.
#Question id: 624
#Unit 1. Molecules and their Interaction Relevant to Biology
The following data were obtained in a study of an enzyme known to follow Michaelis-Menten kinetics: The Km for this enzyme is approximately:
#Question id: 2828
#Unit 2. Cellular Organization
A transcriptionally active gene compared with a transcriptionally inactive gene would be expected to
a. contain acetylated histones.
b. contain unacetylated histones.
c. be sensitive to DNase I.
d. be resistant to DNase I.
#Question id: 4190
#Unit 3. Fundamental Processes
Which statement is false about polysomes?
#Question id: 10808
#Unit 6. System Physiology – Plant
Many plants also contain unusual amino acids, called nonprotein amino acids, these Nonprotein amino acids are often very similar to common protein amino acids. Canavanine, for example, is a close analog of_____A______, and azetidine-2-carboxylic acid has a structure very much like that of_____B________.