Recently, a new concept has been introduced in the view of tumors and tumor cells. It suggests that a relatively small number of cells scattered throughout the tumor are responsible for maintaining the tumor and promoting its spread. Such cells are known as ___________.
a) cancer stem cells
b) anthropomorphic cells
c) tumorific cells
d) tumorlogenous cells
Ans: a) cancer stem cells
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Four of the following are gorilla features. Which one is the exception?
a. spinal cord attached at rear of skull b. C-shaped spine c. legs longer than arms d. flat foot e. opposable big toe
The TATA box is a(n):
A: DNA sequence in the promoter region of many eukaryotic genes. B: activator sequence necessary for proper translation of eukaryotic genes. C: DNA sequence in the operator of prokaryotic genes. D: enhancer consensus sequence of eukaryotic genes. E :a general transcription factor in eukaryotes.
The basic structure of filamentous fungi is the:
a) hypha b) bud c) endospore d) spherule
Which of the following pairs does NOT apply to Chagas' disease?
A) causative agent — Trypanosoma cruzi B) vector — kissing bug C) reservoir — rodents D) diagnosis of acute phase — serological tests for antibodies E) treatment — nifurtimox