A holoenzyme
consists of an apoenzyme plus a cofactor
is inactive
is a non-protein component of an enzyme
an enzyme without an active site
The Correct Answer is A
A. Consists of an apoenzyme plus a cofactor:
A holoenzyme is the complete, active enzyme composed of the protein portion (apoenzyme) together with its required nonprotein component (cofactor or prosthetic group); the holoenzyme is catalytically functional.
B. Is inactive:
The inactive form is typically the apoenzyme (enzyme protein without its cofactor); the holoenzyme denotes the active, fully assembled enzyme.
C. Is a non-protein component of an enzyme:
Non-protein components are cofactors or prosthetic groups; the holoenzyme includes both protein and non-protein parts, so it is not solely the non-protein component.
D. An enzyme without an active site:
An enzyme lacking an active site would be nonfunctional and is not the definition of a holoenzyme; holoenzymes contain the active site within the apoenzyme and are functional when combined with their cofactors.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Are acellular: Subunit vaccines contain only parts of the pathogen, not the whole cell or organism, which reduces the risk of adverse reactions.
B. Are administered in food: Vaccines are generally not delivered through food; this does not contribute to their safety.
C. Do not pose a risk for causing the disease: Because they contain only specific antigens and no live pathogen, subunit vaccines cannot revert to a virulent form or cause infection.
D. Are acellular and do not pose a risk for causing the disease: Subunit vaccines are acellular and composed of purified antigens, making them both safer and incapable of causing disease.
Correct Answer is A
Explanation
A. Antiseptic: Antiseptics are chemical agents suitable for application to living tissue to reduce microbial load on skin and mucous membranes before invasive procedures.
B. Disinfectant: Disinfectants are intended for inanimate surfaces and are often too harsh or toxic for direct use on patient skin.
C. Surfactant: Surfactants (detergents) help remove soils and some microbes but are not the primary agents used to achieve surgical skin antisepsis.
D. Antibiotic: Systemic or topical antibiotics treat or prevent infection but are not the standard topical agent used to prepare skin immediately before surgery.
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.