#Question id: 1358
#Unit 4. Cell Communication and Cell Signaling
In going from the apical to the basal end of an epithelial cell, in what order do the various cell surface junctions appear?
#Question id: 11157
#Unit 9. Diversity of Life Forms
Typically, mutations that modify the active site of an enzyme are more likely to be harmful than mutations that affect other parts of the enzyme. A hypothetical enzyme consists of four domains (A—D), and the amino acid sequences of these four domains have been determined in five related species. Given the proportion of amino acid homologies among the five species at each of the four domains, which domain probably contains the active site?
#Question id: 7267
#Unit 5. Developmental Biology
Endocrine disruptors can interfere with hormone function in many ways like, They can act as antagonists and inhibit the binding of a hormone to its receptor or block the synthesis of a hormone. which of the following example best explains the antagonistic effect of endocrine disruptors?
#Question id: 987
#Unit 1. Molecules and their Interaction Relevant to Biology
Which is not a direct precursor of pyrimidines in their de novo biosynthesis?
#Question id: 4209
#Unit 3. Fundamental Processes
Tryptophan synthesis can be controlled by a process called attenuation in which the levels of tryptophan in the cell control translation by