Which statement about the fate of progenitor cells in Caenorhabditis elegans is not correct?
A. The fate of progenitor cells is determined
by their proximity to the anchor cell, which
secretes epidermal growth factor.
B. Epidermal growth factor binds and
activates a transmembrane receptor protein
in the cell nearest to the anchor cell.
C. In the cell closest to the anchor cell, genes
for differentiation into a type 1 cell are
activated by epidermal growth factor binding
to its receptor.
D. Following epidermal growth factor receptor
activation, the cell closest to anchor cell
inhibits adjacent cells from differentiating to
type 1 cells.
E. Differentiating into a type 2 cell occurs
spontaneously without the need for special
genes for type 2 differentiation.
E
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In the shallow subsurface, surface waters often move through ________, which are porous geological structures below the plant root zone.
Fill in the blank(s) with the appropriate word(s).
Which component of the accompanying scenario would be considered the effector?
a. release of insulin b. glycogen and fat synthesis c. potassium ion channel d. increased glucose levels e. liver and muscle
Describe the relationship between primary, secondary, tertiary, and quaternary structure in proteins
What will be an ideal response?
What type of bond is formed between amino acids?
a. glycosidic b. covalent c. coordinate covalent d. peptide e. network