Which protist group contains the organism Trypanosoma, a colorless parasite that can cause African sleeping
sickness?
a. unikonts
b. excavates
c. rhizarians
d. archaeplastids
e. chromalveolates
b
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______ release the cytokines IL-1 and TNF, which activate _________.
A. Helper T cells, B cells B. Macrophages, complement C. Helper T cells, antigen presenting cells D. Macrophages, helper T cells E. Non-antigenic cells, CD4 cells
Do both males and females appear to be affected?
a. Yes b. No
Herbivores are unable to synthesize about half of the 20 ________ that are required to make proteins
Fill in the blank(s) with correct word
When cultured normal human cells were infected with a virus that carried the genes that coded for a
subunit of telomerase:a. the cells underwent more cell divisions than normal. b. the cells underwent fewer cell divisions than normal. c. the cells died almost immediately. d. the cells underwent gene expression more vigorously. e. the cell cycle shortened.