#Question id: 4149
#Unit 3. Fundamental Processes
Glycosylation of proteins inside the endoplasmic reticulum does not involve:
#Question id: 7187
#Unit 5. Developmental Biology
Following statements regarding to feedback loops during limb development.
A. When the limb bud is relatively small, an initial positive feedback loop is established between Fgf10 produced in the mesoderm and Fgf8 produced in the ectoderm, promoting limb outgrowth.
B. As the limb bud grows, the ZPA is established, and another regulatory loop is created by inhibiting the BMP in mesoderm and maintain FGF expression.
C. In anterior region of the limb bud, Fgf8 positively regulates Etv4/5, which in turn repress Shh in this region, further reinforcing the posterior-to-anterior gradient of Shh from the ZPA.
D. In posterior region of the limb bud, Fgf8 positively regulates Etv4/5, which in turn repress Shh in this region, further reinforcing the posterior-to-anterior gradient of Shh from the ZPA.
Which of the following combinations are incorrect?
#Question id: 4837
#Unit 8. Inheritance Biology
This is the reason why Mendel did not recognizelinkage phenomenon in his experiments
#Question id: 31165
#Unit 7. System Physiology – Animal
#Question id: 7202
#Unit 5. Developmental Biology
Identify
the correct match of the modes of regeneration (column I) with their definition
(column II)
Column I |
Column II |
A. Stem
cell-mediated regeneration |
i. Through
the re-patterning of existing tissues. There is often little new growth but
rather cell death and a change in cell type (i.e., transdifferentiation into
a different cell fate). This results in a rescaling of the whole organism as
well as regeneration of the missing part. |
B. Epimorphosis |
ii. The
differentiated cells divide but maintain their differentiated functions. The
new cells do not come from stem cells, nor do they come from the
dedifferentiation of adult cells. |
C. Morphallaxis |
iii. Adult
structures can undergo dedifferentiation to form a relatively
undifferentiated mass of cells (a blastema) that then redifferentiates during
morphogenesis of the new structure. |
D. Compensatory
regeneration |
iv. Stem
cells allow an organism to regrow certain organs or tissues that have been
lost. |