In some cells, there are many ion electrochemical gradients across the plasma membrane even though there are usually only one or two proton pumps present in the membrane. The gradients of the other ions are most likely accounted for by:

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#Question id: 2950

#Section 3: Genetics, Cellular and Molecular Biology

During which phases of the cell cycle do the chromosomes exist in a doubled state?

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#Question id: 2951

#Section 3: Genetics, Cellular and Molecular Biology

Liver cells are highly specialized, but when the liver is damaged or parts of it are removed surgically, the tissue grows. Liver cells fall into which category of cells?

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#Question id: 2952

#Section 3: Genetics, Cellular and Molecular Biology

Throughout interphase,.. .........  are synthesized at a relatively constant rate, whereas  ............ are synthesized only during the S phase.

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#Question id: 2953

#Section 3: Genetics, Cellular and Molecular Biology

If a cell in the G1 phase is fused with a cell in the S phase, then

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#Question id: 2954

#Section 3: Genetics, Cellular and Molecular Biology

Cyclin concentrations are highest during which periods of the cell cycle?

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#Question id: 2955

#Section 3: Genetics, Cellular and Molecular Biology

Cyclin is to MPF as ............ is to cyclin-dependent kinases.