Denaturation of protein X yields two subunits, A (MW 8,000) and B (MW 20,000). In order to understand the quaternary structure, a crosslinking experiment was performed with cell extracts
Analysis of the crosslinking products by SDS-PAGE showed four bands of the following molecular weights: 7,800, 19,500, 39,000, and 48,000 . This data suggests that protein X functions in vivo as:
A. a dimer.
B. a trimer.
C. a tetramer.
D The results are inconclusive.
B
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Cells are largely constructed from four classes of large molecules called ____________________
Fill in the blank(s) with correct word
A mutation results in a gene product with a novel function that is not normally found in wild-type organisms. This type of mutation is known as __________
A) amorphic B) hypomorphic C) hypermorphic D) neomorphic E) dominant negative
Helper T cells stimulate the proliferation of:
A. Cytotoxic T cells and Macrophages B. Cytotoxic T cells and B cells C. B cells and Macrophages d. All of the above
Mitosis is a cellular process that produces
A. Two genetically identical daughter cells B. Four genetically identical daughter cells C. Two similar, but not genetically identical daughter cells D. Four similar, but not genetically identical daughter cells