Use _____ when observing the shape of bacterial capsule（）
A. Insert method
B. Printing method
C. Water immersion method
D. Negative staining
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The content used by prokaryotic cells to store carbon sources is ___（）
A. Poly-β-hydroxybutyric acid
B. Sulfur drops
C. Metachromatic grain
D. Plasmid
The following ___ is a structure unique to prokaryotic cells（）
A. Mitochondria
B. Nuclear
C. Intermediate
D. Cell membrane
E. Spore
The common forms of bacterial cells are ____（）
A. Spherical
B. Ring
C. Spiral
D. Rod shape
E. Cylindrical
The characteristic structure of the gram-negative cell wall includes ____（）
A. Peptidoglycan
B. Teichoic acid
C. Outer layer
D. Lipopolysaccharide
E. Inner wall layer
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