#Question id: 5145
#Unit 5. Developmental Biology
Doris Taylor’s research group used detergents to remove all the cells from a cadaveric rat heart, which left behind the natural extracellular matrix. Proteins such as fibronectin, collagen, and laminin held together the rest of the extracellular matrix and maintained the intricate shape of the heart. The researchers then infused this extracellular matrix scaffold with cardiomyocyte progenitor cells. Surprisingly, these cells differentiated and organized into a functionally contracting “recellularized” heart. The behavior of extracellular matrix scaffold can promote the differentiation and rebuilding of a beating heart is analogous to which of the interactions?
#Question id: 5146
#Unit 5. Developmental Biology
Choose the correct match.
|
Process |
Definition |
|
a. Epithelial-mesenchymal transition |
i. The phenomenon, whereby cells intercalate to narrow the tissue and at the same time lengthen it. |
|
b. De-adhesion |
ii. The process in which cells that had formerly been part of an epithelium lose their attachments and become individual, migrating cells. |
|
c. Permissive interaction |
iii. The cadherins that couple epithelial cells together are degraded, thereby allowing the cells to become free from their neighbors. |
|
d. convergent extension |
iv. The responding tissue has already been specified and needs only an environment that allows the expression of these traits. |
#Question id: 5147
#Unit 5. Developmental Biology
What is the dissimilarity amongst "fate" and "specification"?
#Question id: 5149
#General Aptitude
If the number 517 * 324 is completely divisible by 3, then the smallest whole number in place of * will be :
#Question id: 5150
#General Aptitude
If the number 481* 673 is completely divisible by 9, then the smallest whole number in place of * will be :
#Question id: 5151
#General Aptitude
If x and y are the two digits of the number 653 xy such that this number is divisible by 80, then x+y= ?