Which of the following can denature a hydrogen bond?
pH less than 6.8.
pH less than 7.8
pH between 7.34 and 7.45.
pH between 6.8 and 7.8
The Correct Answer is A
A. pH less than 6.8: Hydrogen bonds within proteins and nucleic acids are sensitive to strong acidic conditions. When pH falls below 6.8, the high concentration of hydrogen ions disrupts the weak bonds that stabilize molecular structures, leading to denaturation.
B. pH less than 7.8: A pH slightly below 7.8 is still within a physiologically tolerable range and does not usually disrupt hydrogen bonding. The structure of most proteins remains intact in this environment, so denaturation is unlikely here.
C. pH between 7.34 and 7.45: This range represents the normal physiologic blood pH. Within this range, hydrogen bonds remain stable, supporting the proper folding and function of proteins and enzymes.
D. pH between 6.8 and 7.8: This range includes near-normal physiological pH and only mild deviations into acidosis or alkalosis. While extremes outside this range can damage hydrogen bonds, values here are not usually severe enough to cause denaturation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Golgi apparatus: The Golgi apparatus modifies, sorts, and packages proteins and lipids received from the rough ER. It directs vesicles to their appropriate destinations, determining whether they are secreted by exocytosis, remain as organelles, or fuse with the plasma membrane.
B. Nucleus: The nucleus stores genetic material and controls cellular activities through gene expression but does not determine the destination of vesicles.
C. Centrosomes: Centrosomes organize microtubules and are critical for cell division, but they are not involved in vesicle trafficking or secretion.
D. Peroxisomes: Peroxisomes contain enzymes that break down fatty acids and detoxify harmful substances. They function in metabolism but do not direct vesicle destination or exocytosis.
Correct Answer is B
Explanation
A. Sodium (atomic number 11): Sodium has one electron in its outermost shell, making it highly reactive as it tends to lose that electron to achieve a stable configuration.
B. Neon (atomic number 10): Neon has a full outer electron shell (octet), making it chemically stable and largely unreactive under normal conditions. Its electron configuration prevents it from readily forming chemical bonds.
C. Carbon (atomic number 6): Carbon has four electrons in its outer shell and typically forms covalent bonds to complete its octet, so it is chemically reactive.
D. Oxygen (atomic number 8): Oxygen has six electrons in its outer shell and is highly reactive because it seeks two additional electrons to complete its octet, often forming covalent or ionic bonds.
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.