What is the GU-AG rule?
What will be an ideal response?
Ans: The coding strand sequence of a eukaryotic gene has a 5? splice site consensus sequence of GT and a 3? splice site consensus sequence of AG, so the transcribed pre-mRNA will have splice site consensus sequences of GU and AG.
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You begin an experiment involving metabolic processes in human liver cells, but you discover your liver tissue samples have been contaminated with a strain of obligate anaerobic bacteria. Theoretically, how could you kill the bacteria while minimizing damage to the liver cells?
a. soak the tissue samples in pure ethanol b. put the sample through an autoclave c. expose the samples to gaseous oxygen d. dehydrate the tissue samples overnight
The normal pH of rainfall is
A. slightly acidic, pH 5.6. B. slightly basic, pH 5.6. C. slightly acidic, pH 9.6. D. slightly basic, pH 9.6. E. neutral, pH 7.0.
If blood donor type “Z” is Rh+ and first-time blood
recipient “Z” is Rh-, __________ and __________ will result. a. no agglutination; Rh antibody formation b. no agglutination; no Rh antibody formation c. agglutination; Rh antibody formation d. agglutination; no Rh antibody formation e. none of these
How does CO2 enter a plant?
A) Through the roots B) Through the stomata C) Through the stroma D) Through the grana