Surfactants
work best against Gram-negative bacteria
dissolve membrane lipids
may also be called detergents
All of the above
The Correct Answer is D
A. Work best against Gram-negative bacteria: Surfactants disrupt membranes, and Gram-negative bacteria have an outer lipid membrane that is particularly susceptible.
B. Dissolve membrane lipids: Surfactants break down lipid layers in membranes, leading to cell lysis and death.
C. May also be called detergents: Surfactants are often referred to as detergents because of their ability to reduce surface tension and emulsify lipids.
D. All of the above: Surfactants perform all these actions, making this choice the most comprehensive description.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Oxygen: Oxygen is the final electron acceptor in aerobic respiration, not in anaerobic respiration.
B. Pyruvic acid: Pyruvic acid can act as an electron acceptor in certain fermentation pathways but is not the common terminal electron acceptor in anaerobic respiration processes that use inorganic acceptors.
C. Glucose (C₆H₁₂O₆): Glucose is the initial electron donor/substrate for catabolism, not a terminal electron acceptor.
D. Nitrate (NO₃⁻): Nitrate is an inorganic molecule commonly used as a terminal electron acceptor by many bacteria during anaerobic respiration (denitrification or nitrate reduction).
Correct Answer is A
Explanation
A. Are synthesized only when their substrate is available: Inducible enzymes are produced in response to the presence of a substrate or inducer (e.g., the lac operon enzymes are synthesized when lactose is present), conserving cellular resources until needed.
B. Are synthesized continuously by the cell: Constitutive enzymes are synthesized continuously regardless of substrate presence; this statement describes constitutive rather than inducible enzymes.
C. Are only found in prokaryotes: Inducible regulation of enzyme synthesis occurs in both prokaryotes and eukaryotes; it is not exclusive to prokaryotes.
D. Are coded by genes that are always expressed: Genes that are always expressed encode constitutive enzymes; inducible enzyme genes are typically regulated and expressed only under inducing conditions.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.