Most eukaryotic cells have a membrane-bound ________ that contains the genetic material
A) nucleus
B) cytoplasm
C) lysosome
D) plasma membrane
E) cell wall
A
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Using the drawing of mRNA below, choose the letter that best fits the description. The special structure formed at this region is required for initiation of translation. ____
What will be an ideal response?
The genome of prokaryotes consists of
a. a single linear DNA molecule. b. a single circular DNA molecule. c. many linear DNA molecules. d. many circular DNA molecules. e. a single DNA molecule that may be circular or linear, depending on the species.
The hole in the ozone layer is primarily due to
A. burning coal. B. CFCs in the upper atmosphere. C. automobile exhaust. D. use of non-CFC aerosols.
In evolutionary terms, which of the following cells is considered to be the most primitive?
A) Eukaryote B) Heterotroph C) Prokaryote D) Autotroph