Which essential macronutrient for plants is obtained directly from the air?
A) nitrogen
B) magnesium
C) hydrogen
D) carbon
Answer: D
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In the experiment by Davis et al., only fibroblast cells that took up the cloned myoD gene differentiated into muscle cells. This is because
A. only those cells contained muscle-cell-specific enhancer sequences. B. MyoD is a transcription factor that turned on muscle-specific genes such as myosin C. MyoD is a transcription factor that shut off fibroblast specific genes, allowing the muscle cell characteristics to show up D. MyoA and MyoH are transcription factors that shut off muscle-specific genes E. myoD is the gene for myosin and the presence of myosin converts the fibroblast into a muscle cell
A "high-energy bond" in ATP
a. absorbs a large amount of free energy when the phosphate group is attached during hydrolysis. b. is formed when ATP is hydrolyzed to ADP and one phosphate group. c. is similar to the bonds in glucose molecules; that is why glucose can be used as a source of metabolic energy. d. contributes to the “energy in” part of an endergonic reaction. e. is/does all of these.
A(n) ______ is any biological agent that is capable of destroying red blood cells and causing the release of hemoglobin.
Fill in the blank(s) with the appropriate word(s).
The inability to break down galactose is the genetic disorder called ____________. Fill in the blank(s) with the appropriate word(s)