#Question id: 4510
#Unit 3. Fundamental Processes
Which statements are true about group I and group II introns,
A. Group I (and II) introns are not enzymes because they have a turnover number of only 1.
B. A third transesterification reaction can occur to cyclize the intron.
C. They cannot be readily converted into ribozymes.
D. It is similar to the way that the self-cleaving Hammerhead could be converted to a ribozyme by separating the active site from the substrate
#Question id: 12712
#Unit 6. System Physiology – Plant
#Question id: 7309
#Unit 5. Developmental Biology
Following statements are regarding to the molecular basis of the coincidence model in Arabidopsis.
A.
In Arabidopsis under short days, there is little overlap between CO mRNA
expression and daylight.
B.
CO protein does not accumulate to sufficient levels in the phloem to promote
the expression of the transmissible floral stimulus and the plant remains vegetative.
C. Under long days, the peak of CO mRNA abundance (at hours 12 through 16) overlaps with daylight (sensed by phyA and cryptochrome [cry]), allowing CO protein to accumulate.
D. CO activates FLC mRNA expression in the phloem, which
causes flowering when the FT protein is translocated to the apical meristem.
Which of the following is incorrect?
#Question id: 18794
#Unit 13. Methods in Biology
#Question id: 28651
#Unit 2. Cellular Organization
A protein Geminin is binds to some type of factor in late G1 and inhibit it, which specifically involve to loading of the MCM helicase?