If a eukaryote cell contains a non-functional mutated form of RNA polymerase II, what result is most likely?
a. The cell will be unable to assemble ribosomes.
b. The cell will synthesize non-functional tRNAs.
c. The cell will be unable to transcribe most genes.
d. The cell will only be impacted during mitosis.
c. The cell will be unable to transcribe most genes.
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Which of the following reflects a primary difference between transmission and scanning electron microscopy?
A. Transmission electron microscopy has high resolution, but scanning electron microscopy does not. B. Transmission electron microscopy shows contrast, but scanning electron microscopy does not. C. Transmission electron microscopy has much higher magnification than scanning electron microscopy. D. Transmission electron microscopy shows two-dimensional ultrastructure, while the scanning electron microscopy shows three-dimensional structure. E. Transmission electron microscopy uses light as an illumination source, while scanning electron microscopy uses electron beams as an illumination source.
Lamarck believed
a. that a substance called fluida moved through the nerves to areas of the body in need of change. b. in the inheritance of acquired characteristics. c. that giraffes' necks elongated in response to stretching. d. that environmental pressures bring about changes in organisms. e. all of these were true
Membrane lipids can be separated by ________, based on their ________
Fill in the blank with correct word.
________ cells provide for a rapid secondary immune response.
A) Memory B) Effector C) Cytotoxic T cells D) Mast E) Dendritic