Which of the following is TRUE of a morphogen? It is a signaling molecule that
A. is required for cell-to-cell contact within the embryo.
B. induces the differentiation of cells within the embryo.
C. induces blastulation of the developing embryo.
D. induces implantation of the embryo into the uterus of mammals.
E. that separates out cytoplasmic factors to their respective cells within the developing embryo.
B. induces the differentiation of cells within the embryo.
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DNA replication involves the synthesis of an RNA primer on one strand of the DNA
Indicate whether the statement is true or false.
The most common eukaryotic ribosome carries out its function in the
A. Golgi apparatus. B. nucleus. C. cytosol. D. mitochondria. E. chloroplast.
The sensor kinase for the OmpF: OmpC two-component regulatory system is ________.
A. the EnvZ protein B. the OmpK protein C. the MicF RNA D. None of the choices are correct.
How would the hydrolysis of phosphodiester bonds impede the origin of life?
A. It would stop the formation of cell membranes. B. It would prevent the assembly of nucleic acids. C. It would digest amino acids. D. It would slow the rate of protein synthesis.