Which of the following types of microbe was NOT observed by Leeuwenhoek?
A) fungus
B) protozoan
C) prokaryote
D) alga
E) virus
E
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What is the difference between the trithorax (TrxG) and polycomb (PcG) complexes of proteins?
A. TrxG proteins methylate lysine 27 on histone H3 while PcG complexes methylate lysine 4 on H3 B. Methylation of lysine at position 4 on H3 results in silencing of gene expression C. TrxG complex proteins activate gene expression by methylating lysine 4 on H3, while PcG complex proteins repress gene expression by methylating lysine 27 on H3. D. Methylation of H3 on lysine 27 can result in activation of transcription
Viral release from a bacterial cell
A. requires the production of lysozyme encoded by the viral genome. B. requires the production of lysozyme encoded by the eukaryotic genome. C. requires the production of lysozyme encoded by the eukaryotic genome and kills the bacterial cell. D. kills the infected cell. E. requires the production of lysozyme encoded by the viral genome and kills the infected cell.
Mitochondria originated from proteobacteria.
Answer the following statement true (T) or false (F)
Which of the following protozoans is mismatched with the disease that it causes?
A. Trypanosoma brucei-sleeping sickness B. Trichomonas vaginalis-vaginitis and urethritis C. Giardia lamblia-malaria D. Entamoeba histolytica-amoebic dysentery