Select the incorrect statement related to sarcomere structure and function.
A. Sarcomeres are the smallest subunits of muscle contraction.
B. Stacks of thick filaments produce dark bands, called the A band.
C. Two Z lines form the opposite borders of one sarcomere.
D. Thin filaments are not present in the H band of a sarcomere.
E. I bands consist of both thin and thick filaments.
Answer: E
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A genetic cross was performed with two pea plants having green, wrinkled seeds. Of the resulting offspring, 75% had green, wrinkled seeds and 25% had green, smooth seeds. With regard to wrinkled versus smooth seeds, the parents must have been ________.
Fill in the blank(s) with the appropriate word(s).
Name four ways roots benefit a plant.
What will be an ideal response?
Which of the following involves removing introns and reconnecting exons in a pre- mRNA?
a. splicing b. encoding c. translating d. elongation
Cells do not catabolize carbon dioxide because
A) its double bonds are too stable to be broken. B) CO2 has fewer bonding electrons than other organic compounds. C) CO2 is already completely reduced. D) CO2 is already completely oxidized. E) the molecule has too few atoms.