In the cell membrane, what are the "heads" composed of?
A) cellulose
B) chitin
C) enzymatic proteins
D) glycerol linked to a phosphorus-containing molecule
E) glycerol linked to three fatty acid chains
E) glycerol linked to three fatty acid chains
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Given that DNA is the genetic material in prokaryotes and eukaryotes, what other general structures (macromolecules) and substances made by the cell are associated with the expression of that genetic material?
What will be an ideal response?
The pathogen most frequently involved in causing clostridial myonecrosis is
A. Clostridium tetani. B. Streptococcus pyogenes. C. Clostridium septicum. D. Clostridium perfringens.
On day 21 of the menstrual cycle, most progesterone is secreted by the _______ in the ovary.
Fill in the blank(s) with the appropriate word(s).
Cells carry out three major types of work; which of the following involves the synthesis of macromolecules as well as the breakdown of substances for their energy?
A. Chemical work B. Mechanical work C. Transport work D. None of the choices are correct.