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
B. MyoD is a transcription factor that turned on muscle-specific genes such as myosin
You might also like to view...
Which type of microscopy enhances and amplifies slight changes in the phase of transmitted light?
A) differential interference contrast microscopy B) digital video microscopy C) fluorescence microscopy D) phase-contrast microscopy E) both choices A and D
Cutaneous receptors are classified as interoceptors. These specialized skin receptors can respond to which of the following stimuli?
A. heat, cold, and light B. pain, pressure, and sound C. chemicals, light, and sound D. heat, cold, pain, touch, and pressure E. heat, cold, pain, pressure, light, and sound
Which one of the following is NOT usually a symptom of cystic fibrosis?
A. Low fertility or infertility B. Frequent respiratory infections C. Difficulty breathing D. Loss of pancreatic function E. Problems with hearing and vision
Hereditarianism is the idea that all human traits are ____
a. partly influenced by environment b. traceable to our earliest ancestors c. influenced equally by genes and environment d. determined only by genes e. immutable from generation to generation