RNA molecules that function as enzymes
A) form primitive cells.
B) are called ribozymes.
C) developed from protein-based enzymes.
D) degrade proteins.
E) duplicate lipid molecules.
B
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The skin and oral cavity may have anaerobic microenvironments
Indicate whether this statement is true or false.
Which group of algae are a commercial source of agar and carrageenan?
a. red algae b. brown algae c. dinoflagellates d. euglenoids e. green algae
Which of the following could not be used as adhesion?
A. Plasmid B. Fimbriae C. Slime layer D. Glycocalyx
Which of the following statements regarding Neisseria meningitidis is FALSE?
A. There are vaccines available to prevent infection with all strains. B. Up to 40% of the population are carriers. C. Humans are the only natural carriers. D. Transmission is via respiratory droplets. E. It often causes meningitis.