#Question id: 707
#Unit 1. Molecules and their Interaction Relevant to Biology
A repeating structural unit in a multimeric protein is known as a(n):
#Question id: 4813
#Unit 8. Inheritance Biology
You perform the three different two-factor crosses (Cross 1: XY and xy, Cross 2: YZ and yz, and Cross 3: XZ and xz). Assume all crosses are between diploid flies homozygous for the alleles of these genes. You observe 7% recombinants in the first cross, 20% recombinants in the second cross, and 13% recombinants in the third cross. if cross between XyZ and xYz leads to which of the followining recombinant with double cross over .
#Question id: 3342
#Unit 11. Evolution and Behavior
Neutral alleles are those that do not alter fitness and average reproductive success does not differ between individuals that carry one neutral allele or the other. The frequencies of these neutral alleles may change in a population by
#Question id: 1962
#Unit 4. Cell Communication and Cell Signaling
Which cells and which signaling molecules are responsible for initiating an inflammatory response?
#Question id: 2578
#Unit 2. Cellular Organization
Following statements are regarding to proteins which involve actin filament assembly.
A. To nucleate the assembly of branched actin, Arp2/3 needs to be activated by interacting with a nucleation promoting factor (NPF), in addition to associating with the side of a pre-existing actin filament.
B. The NPF WASp is inactive due to an intramolecular interaction that masks the WCA domain.
C. Two NPFs each bind an actin subunit at their WH2 domains, and together, they activate the Arp2/3 complex through its interaction with their connector and acidic domains.
D. The NPF WASp is activated by a coincidence detection mechanism by which intramolecular interaction in WASp is relieved, allowing the W domain to bind actin and the acidic A domain to activate the Arp2/3 complex.
Which of the following statements represents regulation of the Arp2/3 complex by NPF?