These two secondary lesions arise when bleeding or burst capillaries occur in the skin
A) crust and scale
B) papular and maculopapular rashes
C) petechiae and purpura
D) bullae and vesicles
E) cysts and ulcers
Answer: C
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Which of the following is not true of mitotic recombination?
A. Recombination occurs during mitosis when replication forks encounter lesions in the process of repair or single-strand breaks. B. The recombinase Dmc1 is active in mitotic and meiotic recombination mechanisms. C. The BRCA2 protein is a recombination mediator active in mitotic recombination repair. D. It employs synthesis-dependent strand annealing (SDSA) most commonly. E. It can employ double-strand break repair (DSBR), which can lead to crossing over.
Kinetic proofreading allows an enzyme to discriminate between two substrates by:
A. using a binding pocket of a specific size. B. using a multistep reaction and energy to reverse reactions. C. using a binding pocket of a specific shape. D. increasing the rate of the single chemical step of the reaction.
In E. granulosus infections, the hydatid cysts usually occur in which organ?
a. Stomach b. Brain c. Intestines d. Liver
The most widely accepted and supported model that explains the movement of xylem sap is the ____ mechanism
a. cohesion-tension b. translocation c. pressure flow
d. osmosis e. transpiration