Which mineral is needed for the proper functioning of nerves, muscles, and bones?
A) calcium
B) linoleic acid
C) sodium
D) salt
A
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One of the properties of cancer is its ability to spread, or ____________________, to other sites in the body. Fill in the blank(s) with the appropriate word(s)
In animal cells the main microtubule organizing center (or centrosome) is important in cell division
__________________ Indicate whether the statement is true or false.
One potential consequence of protein denaturation is that the:
A) protein becomes more tightly folded. B) protein adds another polypeptide to its folded shape. C) protein loses its functionality. D) protein performs more efficiently than it did before. E) protein's primary structure changes.
Before chromosomes segregate in M phase, they and the segregation machinery must be appropriately prepared. Indicate whether the following statements are true or false. If false, change a single noun to make the statement true
A. Sister chromatids are held together by condensins from the time they arise by DNA replication until the time they separate at anaphase. B. Cohesins are required to make the chromosomes more compact and thus to prevent tangling between different chromosomes. C. The mitotic spindle is composed of actin filaments and myosin filaments. D. Microtubule-dependent motor proteins and microtubule polymerization and depolymerization are mainly responsible for the organized movements of chromosomes during mitosis. E. The centromere nucleates a radial array of microtubules called an aster, and its duplication is triggered by S-Cdk. F. Each centrosome contains a pair of centrioles and hundreds of ?-tubulin rings that nucleate the growth of microtubules.