The stage of mitosis characterized by the physical separation of sister chromatids is called:
A. Telophase
B. Prometaphase
C. Anaphase
D. Metaphase
Answer: C
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a. chromatin b. mRNA c. ribosomal subunit d. gene e. protein
The descending arm of the loop of Henle is permeable to ____ but impermeable to ____
a. water; potassium ions b. water; sodium ions c. sodium ions; water d. potassium ions; water e. all choices are incorrect
What type of bonding is responsible for maintaining the shape of the tRNA molecule?
A. van der Waals interactions between hydrogen atoms B. covalent bonding between sulfur atoms C. peptide bonding between amino acids D. hydrogen bonding between base pairs E. ionic bonding between phosphates
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A) to turn skin cells into hair cells B) to allow mature leaves to increase in size C) to keep cell size small as multicellular organisms grow D) to allow cell size to increase to its maximum