#Question id: 11767
#Unit 10. Ecological Principles
If a population has a stable age distribution, which of the following statements is true?
#Question id: 1385
#Unit 4. Cell Communication and Cell Signaling
The ability of a population of fibroblasts to migrate along the surface of a tissue culture dish depends on adhesion between the cell surface and the extracellular matrix molecules coating the dish. The dish is coated with laminin, and the only cell-surface protein capable of binding laminin is a cell-adhesion protein called an integrin. Integrins are integral plasma-membrane proteins that function as heterodimers. Under these conditions the rate at which a fibroblast can migrate along the laminin coated culture dish is proportional to the strength of adhesion between the cell and the laminin substrate. The table below lists the rate of cell migration observed for fibroblasts genetically engineered to generate the indicated phenotypes.
Which of the following is the most likely explanation for failure of overexpression of the integrin alpha subunit to alter the rate of fibroblast migration?
#Question id: 11043
#Unit 7. System Physiology – Animal
An increase in which of the following tends to decrease capillary filtration rate?
#Question id: 741
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of following statements are INCORRECT about secondary structure of proteins
A. Long block of Glu residues segment of the chain will not form an alpha helix at pH 7.0 but it ll take helical confirmation below its pKR value
B. Long block of Lys residues segment of the chain will not form an alpha helix at pH 7.0 but it ll take helical confirmation above its pKR value
C. Long block of Ala residues segment of the chain will not form an alpha helix at pH 7.0 but it ll take helical confirmation below its pKR value
D. Histidine side chain remain uncharged over pH range 3-6
#Question id: 7587
#General Aptitude