#Question id: 15875
#Unit 12. Applied Biology
#Question id: 3737
#Unit 3. Fundamental Processes
The main difference between prokaryotic and eukaryotic DNA replication mechanisms is
#Question id: 8287
#Unit 9. Diversity of Life Forms
The following phylogeny shows six living
species (a-f) and five ancestral (now extinct) species (#1-5). If the phylogeny
had been developed on the basis of similarities in bone structure, which of the
following predictions would you make in terms of the structure of a particular
enzyme?
#Question id: 7204
#Unit 5. Developmental Biology
Following statements are regarding to anterior-posterior polarity in planaria.
A. The anterior expression of Notum functions to antagonize the posteriorly produced Wnt, leading to head specification.
B. Regulation of the balance between Wnt and Notum signals may underlie not only head-tail specification but also regulation of organ size.
C. In addition, there appears to be an anterior-to-posterior gradient of Erk signaling that functions as a positive inducer of tail specification.
D. Wnt signaling achieves its repression of head regeneration by inhibiting Erk. Therefore, only in those more anterior regions lacking Wnt (due to Notum’s repression of Wnt) can Erk induce head regeneration.
Which of the following statements are incorrect?
#Question id: 2398
#Unit 2. Cellular Organization
Which of the following processes is driven by chemiosmosis?