All of the following describe(s) an enzyme, except
An enzyme speeds up a chemical reaction in living organisms.
An enzyme is a biological catalyst.
An enzyme reacts with the reactants and becomes part of the products.
An enzyme is specific to the chemical reaction it catalyzes.
The Correct Answer is C
A. An enzyme speeds up a chemical reaction in living organisms: Enzymes function as catalysts by lowering the activation energy needed for reactions, allowing biological processes to occur more quickly and efficiently.
B. An enzyme is a biological catalyst: Enzymes are proteins that serve as catalysts in living systems, regulating the speed of biochemical reactions without being permanently altered.
C. An enzyme reacts with the reactants and becomes part of the products: Enzymes do not become part of the products; they bind substrates temporarily, facilitate the reaction, and are released unchanged, allowing them to be reused multiple times.
D. An enzyme is specific to the chemical reaction it catalyzes: Enzymes have a highly specific active site that matches particular substrates, making them selective for certain reactions or molecular interactions.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. streptobacilli: Streptobacilli are rod-shaped bacteria arranged in chains. The image shows spherical bacteria.
B. streptococci: Streptococci are spherical bacteria that form chains. The bacteria in the image appear in clusters rather than chains.
C. staphylococci: Staphylococci are spherical bacteria that form grape-like clusters, which matches the arrangement seen in the image. This clustering pattern is a key characteristic of staphylococcal species.
D. palisades: Palisade arrangements refer to rod-shaped bacteria lined up side by side like a fence. The bacteria in the image are spherical and clustered.
Correct Answer is D
Explanation
A. fish: Fish are a source of other parasitic infections such as Diphyllobothrium latum (fish tapeworm), but they are not the intermediate host for Taenia saginata.
B. ducks: Ducks may carry parasites and bacteria transmissible to humans, but they are not associated with transmission of Taenia saginata.
C. pigs: Pigs serve as the intermediate host for Taenia solium (pork tapeworm), not Taenia saginata.
D. cows: Cattle are the intermediate host for Taenia saginata (beef tapeworm). Humans acquire the infection by consuming undercooked or raw beef containing larval cysts.
E. chickens: Chickens can transmit other pathogens such as Salmonella, but they are not involved in the life cycle of Taenia saginata.
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