What is the role of tubulin during mitosis in eukaryotic cells?
A. It pulls a cell's chromosomes apart during cell division.
B. It is used to bind some adjacent cells together in animal cell junctions.
C. It is necessary for the cell to grow.
D. It is necessary for the DNA to replicate.
E. It maintains cell shape with an internal scaffold structure.
A. It pulls a cell's chromosomes apart during cell division.
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rRNA has an enzymatic role in all stages of protein synthesis
Indicate whether the statement is true or false.
A hypothetical endangered species of wildflower has been reduced to a single small population in a mountain meadow. A rare early spring blizzard kills all but 3 of the remaining plants, one of which has a rare mutation. This is an example of:
A. natural selection. B. sexual selection. C. genetic drift/bottleneck. D. genetic drift/founder event. E. None of the answer options are correct.
Two researchers suggested in the 1960s that ____ may have been the first informational molecule
a. DNA b. a protein c. RNA d. ozone e. an amino acid
A molecule consists of ____
a. radioactive compounds b. two or more atoms of the same element c. electrically charged elements d. elements with one or more extra neutrons e. atoms held together by chemical bonds