The structures of porin proteins in bacterial membranes and mitochondrial and chloroplast outer membranes is atypical for multipass integral proteins,
because the porin transmembrane region is composed of a ________ instead of ________ transmembrane segments as in bacteriorhodopsin.
Fill in the blank with correct word.
Answer: β-barrel (cylindrical β-sheet); α-helical
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What is the distribution of phenotypes from a cross of purple tall pea plants that are heterozygous for flower color and plant height? (Purple is dominant to white; tall is dominant to dwarf.)
A. 63 purple tall; 28 purple tall; 27 white dwarf; 7 white dwarf B. 132 purple tall; 138 white dwarf C. 54 purple tall; 6 white dwarf D. 100% purple tall E. 27 purple dwarf; 28 purple tall; 31 white dwarf; 29 white tall
When tumor suppressor genes are ____ this significantly increases the chance of a woman getting cancer.
a. over-expressed b. under-expressed/deleted c. expressed d. all of the above
Which antibody class is most prevalent in the bloodstream?
A. IgE B. IgD C. IgM D. IgA E. IgG
When making functional form choices to alleviate an interpolation/extrapolation identification challenge the justification will almost always take what form?
A. A p-value from a test statistic B. A hypothesis test C. Theoretical argument D. A calculation of difference of means across sub-samples of the data