An enzyme lowers activation energy by ____
a. keeping substrates apart
b. orienting substrates randomly
c. breaking the laws of thermodynamics
d. shutting out water molecules
e. physically breaking chemical bonds
ANSWER: d
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Class I MHC proteins have grooves with open ends
Indicate whether the statement is true or false.
Antimicrobial spectrum of activity is best defined as
A. The types of bacteria against which a particular antimicrobial agent does and does not have activity B. the mechanism a microorganisms uses to resist the effects of a given antimicrobial C. Combination drug therapies D. Refers to the multidrug resistance of an organism
The modified amino acid f-Met is essential for
A. bacterial translation. B. bacterial transcription. C. eukaryotic transcription. D. eukaryotic translation. E. eukaryotic mRNA processing.
Isoenzymes are different enzymes that catalyze the same reaction but can be regulated independently of one another.
Answer the following statement true (T) or false (F)