The ? helix contains ______________ amino acids residues per turn. One full turn of the ? helix is ______________ long
A. 5.4, 3.6 Å
B. 36, 54 Å
C. 3.6, 5.4 Å
D. 5.4, 1.5 Å
E. 3.6, 1.5 Å
C
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Fibroblast cells are a good model system for studying muscle differentiation because
A. they are totipotent B. they never differentiate into muscle cells in a normally developing animal C. they can differentiate into muscle cells in a normally developing animal D. they express a limited number of genes E. they have a small genome
The pigments responsible for the color of red algae are the prodigiosins
Indicate whether the statement is true or false.
The maximum possible rate of increase is a species' __________ potential. Fill in the blank(s) with the appropriate word(s)
An ABC transporter:a
is a type of water channel. b. uses the energy of ATP to transport solutes. c. uses gated channels to transport ADP. d. is present in kidney tubules and prevents dehydration. e. is a type of porin.