The slide coagulase test is a rapid screening test for the production of:
a. clumping factor.
b. free coagulase.
c. extracellular coagulase.
d. catalase.
A
The rapid slide test is a screening test for one form of coagulase produced by S. aureus that is positive for 90% of all isolates of this organism.
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Free energy change is a measure of the rate of reaction.
Answer the following statement(s) true (T) or false (F)
What is the fundamental unit of all substances?
a. Atom b. Cell c. Organ d. Tissue e. Community
The C-value is the amount of DNA in a
A) haploid genome. B) diploid genome. C) bacterial genome. D) eukaryotic genome. E) cell's nucleus.
The rate of facilitated diffusion of a molecule across a membrane will increase as the concentration gradient of the molecule across the membrane increases to a certain point. Eventually, an increase in the concentration of the molecule will not cause any further increase in facilitated diffusion. Thus, there is a maximal rate of facilitated diffusion. This is because
A) the diffusion constant depends on the concentration gradient. B) the increased concentration gradient causes a situation far from equilibrium. C) there are a limited number of carrier proteins in the membrane. D) as the concentration gradient increases, molecules interfere with one another. E) facilitated diffusion requires ATP energy.