During which stage of the cell cycle do the chromosomes duplicate?
A. telophase
B. prophase
C. mitosis
D. anaphase
E. interphase
Answer: E
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A protein is synthesized on a ribosome within the rough endoplasmic reticulum. If the protein needs to be modified
and packaged before export from the cell, to which structure is it sent?
a. endosome b. lysosome c. Golgi body d. nucleus e. smooth endoplasmic reticulum
The letter “A” in the above figure represents the
a. style. b. ovary. c. stigma. d. anther. e. filament.
You have discovered a new cytoskeletal element and need to identify and characterize it for further work. How would you go about examining this protein to ultimately classify it as a cytoskeletal element?
What will be an ideal response?
Individuals with PKU tend to have high levels of _______ in their blood because they have an inactive variant of an _______.
A: phenylpyruvic acid; enzyme B: hemoglobin; oxygen transport protein C: tyrosine; enzyme D: phenylpyruvic acid; oxygen transport protein E: tyrosine; oxygen transport protein