You plant a seed in a pot with soil, add water, and then place it in the sunlight in a closed chamber. Before the seedling emerges from the soil, carbon dioxide levels increase in the closed chamber. This indicates that is occurring.
A. photosynthesis
B. alcohol fermentation
C. cellular respiration
D. sucrose production
E. fertilization
C. cellular respiration
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A researcher is studying eukaryotic cells that shows an abnormal pattern of surface glycosylation. The researcher determines that these cells have normal levels of glycolipids and integral membrane proteins with O-linked glycosylation. The researcher discovers that there are no N-linked glycosylated proteins on the cell surface and unusually high levels of glycosylated in the ER membrane. What is a reasonable hypothesis to explain this observation?
A. The cell is defective in synthesizing of carbohydrates B. The cell is defective in assembling carbohydrate trees C. The cell has a defective oligosaccharide transferase D. The cell has a defect in its protein sorting pathway E. The cell has a defect in its ER localization signal
Which of the following factors is NOT a density-dependent regulator of population size?
a. competition for food b. limitation of nesting sites c. disease d. parasitism e. drought
At the end of meiosis I, the resulting two cells are
a. identical in all ways. b. genetically identical. c. genetically different. d. hexaploid. e. prepared to enter interphase so the chromosomes can be replicated.
Which of the following does NOT occur during mitosis?
A) condensation of the chromosomes B) replication of the DNA C) spindle formation D) separation of the spindle poles