In antibody-mediated immunity, where does the antigen first bind?

A. helper T cell
B. memory cell
C. BCR
D. plasma cell
E. TCR


Answer: C

Biology & Microbiology

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You have discovered a new microorganism, but you want to know if it is a eukaryote or a prokaryote. To investigate this question you prepare a slide with a simple stain and view it with a light microscope with a 40X objective lens and 10X ocular lens

You also prepare a control slide using Saccharomyces cerevisiae (a unicellular eukaryote). You can see the cells on your control slide, but you don't see cells when you look at your unknown microorganism. What can you conclude from this experiment? A) The experiment failed to visualize the organism because the stain killed it. B) Your new unknown microorganism is probably a virus. C) The cells of the new unknown microorganism may be too small to see with the objective and ocular lenses you used. D) The new unknown microorganism is probably an archaeon.

Biology & Microbiology

All ________ have two very different types of nuclei within their cells, small micronuclei and larger macronuclei. 

A. sporozoans B. protists C. oomycetes D. ciliates E. dinoflagellates

Biology & Microbiology

Cellular slime molds can be distinguished from plasmodial slime molds on the basis of ____.

A. reproductive structures B. spore formation C. number of nuclei per cell D. slime trails E. food requirements

Biology & Microbiology

Which process does not aid expulsion of an infant by contractions during labor?

A) oxytocin produced by the mother B) increased number of hormone receptors on uterine cells C) oxytocin produced by the fetus D) HCG produced by the mother

Biology & Microbiology