One of the functions of a centromere is to form kinetochores for proper chromosome segregation. The other function is to
A) hold sister chromatids together.
B) ensure that proper chromosome arm length is maintained.
C) allow easy karyotyping.
D) allow replication of chromosome ends.
A) hold sister chromatids together.
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In chemolithotrophic Archaea, H2 is a common electron donor
Indicate whether the statement is true or false.
In cell fractionation, which cellular structure or molecule is isolated in a pellet after the first centrifugation?
a. nuclei b. mitochondria c. ribosomes d. proteins e. nucleic acids
The unique properties of different membranes are primarily a function of their
a. glycolipids. b. phospholipids. c. cholesterol molecules. d. proteins.
The production of second messengers in signal transduction offers at least two advantages, speed and
A. reversibility. B. amplification. C. one-to-one stoichiometry. D. specificity. E. affinity.