Which option would be the LEAST effective initial line of defense against pathogens?
A. Thin, unkeratinized skin of a salamander
B. Strong stomach acid
C. Thick mucus coating the trachea
D. Lysosomes in the fluid bathing the eye
E. Exoskeleton of a beetle
A. Thin, unkeratinized skin of a salamander
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When scientists placed ATP Synthase linked to fluorescent actin on a microscope slide and added ATP, the actin could be seen spinning counterclockwise. If the experiment could be replicated in a cell going through oxidative phosphorylation what would happen?
A. The actin would spin clockwise because ATP would be hydrolyzed. B. The actin would spin clockwise because ATP would be produced instead of hydrolyzed. C. The actin would spin counterclockwise because ATP would be hydrolyzed. D. The actin would spin counterclockwise because ATP would be produced instead of hydrolyzed.
Some bacteria in the deep oceans use iron as an
energy source to make carbohydrates from carbon dioxide. These bacteria would be classified as
a. chemoautotrophs. b. chemoheterotrophs. c. photoautotrophs. d. photoheterotrophs. e. decomposers
Many vitamins are important ________ of enzymes
A) protein cofactors B) coenzymes C) allosteric inhibitors D) competitive inhibitors E) activators
Treatment of infection with Clostridium tetani includes cleaning the wound, antimicrobials and
A. active immunization. B. passive immunization. C. blood transfusions. D. both active and passive immunization. E. both passive immunization and blood transfusions.