A cancer originated from muscle tissue is called
A. Carcinoma
B. Sarcoma
C. Lymphoma
D. Leukemia
Ans: B. Sarcoma
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Which of the following are functions of decomposer fungi? Check all that apply.
_____ breakdown of leaf litter _____ breakdown of wood _____ breakdown of dead animals _____ recycling of essential nutrients _____ breakdown of pathogenic bacteria
Why does the activation of a protein kinase that acts on initiation factor eIF2 block protein synthesis?
a) Phosphorylated eIF2 denatures. b) Phosphorylated eIF2 cannot exchange its GDP for GTP, which is required for eIF2 to participate in another round of translation initiation. c) Dephosphorylated eIF2 cannot exchange its GDP for GTP, which is required for eIF2 to participate in another round of translation initiation. d) Phosphorylated eIF2 is hyperactivated, blocking further translation. e) Phosphorylated eIF2 cannot exchange its GTP for GDP, which is required for eIF2 to participate in another round of translation initiation.
The lacP site within the lac operon is upstream of the genes that encode for lactose uptake and metabolism proteins. The lacP site is
A. the lac promoter site. B. where RNA polymerase binds. C. the site where genes are transcribed that encode proteins for metabolizing lactose. D. the lac promoter site where RNA polymerase binds. E. the lac promoter site, where genes are transcribed that encode proteins for metabolizing lactose.
Of the following molecules, which would not be expected to be moved across a membrane by simple diffusion?
A) oxygen B) fatty acids C) water D) glucose E) dimethylurea