#Question id: 4077
#Unit 3. Fundamental Processes
Which of the following is (are) associated with most polyadenylation events?
a. cleavage of the 5ยด end of the RNA molecule
b. an assembly of a large, multiprotein complex
c. the AAUAAA site upstream of where polyadenylation will occur
d. a GU-rich or U-rich region near the cleavage site
e. slow addition of A residues followed by rapid addition of 200 to 250 more A residues
#Question id: 4403
#Unit 3. Fundamental Processes
Which of the following does (do) not require a DNA helicase activity?
a. SWI/SNF function b. Pol II open-complex formation
c. transcription-factor binding to DNA
d. deacetylation of histone tails
#Question id: 5685
#Unit 5. Developmental Biology
Human sperm are allowed to fertilize ova having non- functional ovastacin. The following possibilities may be of significance in the fusion of these gametes:
A. The sperms will not fertilize ova.
B. The sperms will bind and penetrate the zona pellucida but will not be able to fuse with ovum membrane.
C. ZP2 will not be clipped by cortical granule protease.
D. CD9 protein of egg membrane microvilli will not be able to interact sperm membrane proteins in the absence of ovastacin.
E. Polyspermy may occur frequently.
Which combination of statements represent the outcome of the above event?
#Question id: 1740
#Unit 4. Cell Communication and Cell Signaling
Activation of resting B-cells by T-helper cells depends directly upon costimulatory interaction between:
#Question id: 12157
#Unit 9. Diversity of Life Forms