This cytoskeletal structure is composed of actin and regulates cell shape, cell movement, and muscle contraction.
A. microfilaments
B. intermediate filaments
C. microtubules
D. both microfilaments and intermediate filaments
E. both microfilaments and microtubules
A. microfilaments
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Most of the significant changes in activities and functions that accompany passage through a cell cycle checkpoint are regulated by the:
A. activation of microtubules. B. changes in membrane polarization. C. activation of kinase enzymes. D. activation of DNA polymerase. E. inhibition of cyclin proteins.
Could two phenotypically normal parents have a color-blind child?
a. Yes b. No
Proteins are made of ________________________, and the sequence of these determine how the protein will fold up and take shape, which ultimately determines it's function.
Fill in the blank(s) with the appropriate word(s).
The first single-celled organisms appeared around 3.5 ________ years ago
Fill in the blank(s) with correct word