#Question id: 3261
#Section 3: Genetics, Cellular and Molecular Biology
A parent population (P) is change into daughter populations (Q) which grow in habitats. After 1000 generations, the equilibrium frequency distribution of of the daughter populations is shown in the figure below. For reference, the vertical line represents the mean of the parent population. Which type of natural selection?
#Question id: 27236
#Section 3: Genetics, Cellular and Molecular Biology
Group of adjacent nucleotides are joined by ____________
#Question id: 626
#Section 2: General Biology
A metabolic pathway proceeds according to the scheme, R -> S -> T -> U -> V -> W. A regulatory enzyme, X, catalyzes the first reaction in the pathway. Which of the following is most likely correct for this pathway?
#Question id: 2151
#Section 2: General Biology
Which of the following statement(s) is (are) true of transmembrane proteins?
a. All contain a hydrophobic α helix.
b. Some serve as membrane attachment sites for peripheral membrane proteins.
c. Some contain more than one membrane-spanning domain.
d. All are asymmetrically oriented in the lipid bilayer.
#Question id: 16444
#Section 7: Recombinant DNA technology and Other Tools in Biotechnology
Gels of 15% polyacrylamide are useful for separating proteins in the range Mr = 100,000 to 10,000, while a 7.5% gel are used to separate