A ________ layer consists of diffuse unorganized polysaccharide material that lies outside the cell wall and is easily removed.
Fill in the blank(s) with the appropriate word(s).
slime
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There are 20 different amino acids. What makes one amino acid different from another?
A) different side chains (R-groups) attached to a carboxyl carbon B) different side chains (R-groups) attached to the amino groups C) different side chains (R-groups) attached to an ? carbon D) different structural and optical isomers E) different asymmetric carbons
Thiomargarita species store large amounts of ________ in huge internal vacuoles.
A. nitrate B. oxygen C. sulfate D. hydrogen sulfide
Muscles originate from the ____
a. ectoderm only b. endoderm only c. mesoderm only d. ectoderm and endoderm e. ectoderm and mesoderm
After 30 cycles of PCR cloning of a segment
of DNA, how many copies of that segment will there be?
a. 1000 b. 10,000 c. 100,000 d. 1,000,000 e. 1,000,000,000