Which structure surrounds the cytoplasm of the cell and separates the interior of the cell from the external environment?
Plasma membrane
Nucleus
Nucleoid
Endoplasmic reticulum
plasma membrane
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Which of the following is considered a cardinal growth temperature?
A. The minimum temperature B. The optimum temperature C. The maximum temperature D. All of these are considered cardinal growth temperatures.
If the cell whose nuclear material is shown in the accompanying figure continues toward completion of mitosis, which of the following events would occur next?
A) cell membrane synthesis B) spindle fiber formation C) nuclear envelope breakdown D) formation of telophase nuclei E) synthesis of chromatids
Which subatomic particle gets calculated in a mass number?
a. protons b. neutrons c. protons and neutrons d. protons and electrons
When Calvin injected 14C labeled CO2 into cultures of green algae, what result was obtained because the molecule accepting the CO2 was unstable?
A. Radioactivity first appeared in 3-phosphoglycerate. B. Radioactivity first appeared in glucose. C. Radioactivity appeared last in ribulose bisphosphate. D. Radioactivity appeared last in glucose. E. Radioactivity appeared last in 3-phosphoglycerate. F. Radioactivity first appeared in ribulose bisphosphate.