In this diagram, mitotic spindle microtubules have attached to the sister chromatids at their kinetochores. In which phase of mitosis do the microtubules attach to the kinetochore?
a. prophase
b. metaphase
c. prometaphase
d. telophase
c. prometaphase
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Genes that encoded for polymerases, gyrases, ribosomal proteins, and other proteins essential to replication, transcription, and translation are present on
A) chromosomes. B) plasmids. C) chromosomes and plasmids. D) neither chromosomes nor plasmids.
How is the leucine zipper formed, and what is its function?
What will be an ideal response?
Under standard conditions, ATP can release _______ for every molecule converted to ADP.
A. 1 to 2 cal of energy B. different amounts of energy depending on the cell C. 7.3 Kcal of energy D. less than 1 cal of energy
A main contribution of cyanobacteria to desert crust is ____________.
A. producing starch B. water storage C. unburying the soil when winds blow sand over it D. fixing atmospheric carbon E. fixing nitrogen