Outline the various ways in which chromosomes can regulate how much of an enzyme is present at
any given time within a eukaryotic cell. What will be an ideal response?
Concepts to Consider: Having multiple copies of the gene coding for the enzyme; inactivation of
genes by locally changing the structure of the chromosome; inactivation of genes by methylation of
DNA.
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Myelinated axons make up the _____ matter of the brain and spinal cord
Fill in the blank(s) with correct word
What adaptation arose in plants that allowed the uptake of water and minerals in a terrestrial environment?
A. development of stomata B. production of pollen C. production of lignin D. production of a cuticle E. development of roots
The immune system's attack on the body's own
cells a. is an autoimmune response. b. results in anaphylactic shock. c. is a type of acquired immune deficiency syndrome. d. is due to the inactivation of helper T cells. e. is due to an error in the production of MHC markers.
Ribosomes are directly involved bacteriophage _______________ synthesis
a. lipid b. DNA c. RNA d. protein