In a patient who is exhibiting signs of graft-versus-host disease, which cell type is most likely responsible for the reaction?

A. B cells
B. T cells
C. Macrophages
D. Eosinophils


Ans: B. T cells

Biology & Microbiology

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How are the ATP and NADPH molecules (made during the light-dependent reactions) used in the conversion of PGA to PGAL in the Calvin Benson cycle?

a. ATP donates a phosphate group and NADPH donate electrons and hydrogen. b. ATP and NADPH both donate phosphate groups. c. ATP provides electrons and NADPH provides a phosphate group. d. ATP provides a carbon source and NADPH donates electrons and hydrogen. e. ATP donates a phosphate group and NADPH provides a carbon source.

Biology & Microbiology

What kind of bond exists between two amino

acids in a protein?

a. peptide b. ionic c. hydrogen d. amino e. sulfhydroxyl

Biology & Microbiology

The rate and depth of breathing are governed by all of the following EXCEPT

a. chemoreceptors in arterial walls. b. baroreceptors in the diaphragm. c. the partial pressure of O2 in the atmosphere. d. a respiratory center in the brainstem. e. carotid and aortic bodies

Biology & Microbiology

Selection that reduces the frequency of hybridization and/or the fitness of hybrids between populations following secondary contact is termed ________

Fill in the blank(s) with correct word

Biology & Microbiology