In order to understand how chromosomes move during anaphase of mitosis, researchers tagged ____ with a
fluorescent label before photobleaching the cell and examining chromosomal movement under a microscope.
a. DNA
b. kinetochore microtubules
c. nonkinetochore microtubules
d. histones
e. motor proteins
ANSWER: b
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Several genetic disorders, including Fanconi anemia and ataxia telangiectasia, are caused by mutations in ____
a. the cell wall b. mitochondrial DNA c. ribosome structure d. DNA repair genes e. DNA polymerase genes
What prevents a plant cell from bursting in a hypotonic solution?
a. plasma membrane b. transport proteins which help pump the excess water out of the cell c. cell wall d. a plant cell will not burst in a hypotonic solution because water is moving out of the cell
A genus in the family Enterobacteriaceae that is a major pathogen of crop plants is ________.
A. Yersinia B. Proteus C. Erwinia D. Shigella
E = unattached earlobes. e = attached earlobes. In the cross of Ee and Ee, the chance of a child with unattached earlobes is _____.
a. 3/4 b. 1/4 c. 1/2