Which one of the following signs is not right? ( )
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Which energy is the highest? ( )
A. 3,2,+1
B. 3,1,0
C. 3,1,-1
D. 4,2,0
Microtubules function in cells
A. as structural supports, maintaining the shape of the cell
B. participate in cell division
C. as a part of the system that causes movement in cilia and flagella
D. all of the above
Proteins are polymers of
A. amino acids
B. carbohydrates
C. nucleic acids
D. lipids
Which organelle contains DNA?
A. lysosome
B. mitochondrion
C. Golgi body
D. ER
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