All of the following are correct about the indirect ELISA, except

A) It is the common screening test for antibodies to Hepatitis A.
B) It is the common screening test for antibodies to Helicobacter.
C) It can detect antibodies in a serum sample.
D) A known antigen is adsorbed to the surface of a well.
E) Color development indicates that antibody was not present in the patient's serum.


E) Color development indicates that antibody was not present in the patient's serum.

Biology & Microbiology

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Why would it be better to transplant a plant with a ball of soil surrounding its roots?

a. The root hairs will remain intact. b. The nutrients will not escape from the roots. c. The plant is used to that particular soil. d. The weight of the soil helps the plant.

Biology & Microbiology

The ____ horizon tends to accumulate mineral ions but relatively little organic matter, and is generally penetrated by

mature tree roots?

a. A horizon b. B horizon c. C horizon d. D horizon e. O horizon

Biology & Microbiology

How do cytotoxic T cells recognize that a transplant is foreign?

A. Presence of different complement factors on the graft B. Presence of different class I MHC molecules on the graft C. Presence of different class II MHC molecules on the graft

Biology & Microbiology

Homeobox or homeobox-like genes are responsible for very similar developmental controls seen in all

of the following organisms except:a. Drosophila. b. Arabidopsis. c. C. elegans. d. H. sapiens e. E.coli

Biology & Microbiology