#Question id: 2193
#Unit 2. Cellular Organization
A membrane is examined using freeze-fracture and freeze-etch analysis. The surfaces are shown to have almost no pits or bumps. Which of the following is the most likely source of the membrane?
#Question id: 6543
#General Aptitude
What is the next number in the following sequence :
2,3,5,6,3,4,7,12,4,5,9......
#Question id: 1767
#Unit 4. Cell Communication and Cell Signaling
Which of the following immunoglobulin is the most abundant immunoglobulin in newborns?
#Question id: 6564
#General Aptitude
Find the wrong number in the series : 3, 4, 10, 32, 136, 685, 4116
#Question id: 4456
#Unit 3. Fundamental Processes
Correct statement about two striking structural changes are seen in the enzyme upon isomerization from the closed to the open complex;
A. First, the pincers at the front of the enzyme clamp down tightly on the downstream DNA.
B. Second, there is a major shift in the position of the amino-terminal region of s. When not bound to DNA, s region 3.2 lies within the active center cleft of the holoenzyme, blocking the path that, in the open complex, is followed by the template DNA strand.
C. In the open complex, region 1.1 shifts some 50 A˚ and is now found on the outside of the enzyme, allowing the DNA access to the cleft.
D. Region 1.1 of s is highly negatively charged ( just like DNA).