A chemical reaction in which bonds are broken is usually associated with
forming a larger molecule
the consumption of energy
the release of energy
a synthesis
The Correct Answer is B
A. Forming a larger molecule: The formation of larger molecules occurs during synthesis reactions, where smaller molecules combine. Bond breaking is not linked with building larger molecules.
B. The consumption of energy: Breaking chemical bonds requires input of energy to overcome the attractive forces holding atoms together. This energy is absorbed from the surroundings, making bond breaking an endergonic process.
C. The release of energy: Energy release happens when new, more stable bonds are formed during reactions. Bond breaking itself does not release energy but instead requires energy.
D. A synthesis: Synthesis refers to constructing complex molecules from simpler ones, which usually involves bond formation rather than bond breaking.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Nutrients, water, movement, and reproduction: Movement and reproduction are important functions, but they are not considered fundamental survival needs for maintaining life at the cellular and systemic level.
B. Nutrients, water, growth, and reproduction: Growth is a process that occurs when survival needs are met, but it is not a basic requirement for immediate survival, unlike oxygen or appropriate atmospheric pressure.
C. Nutrients, water, atmospheric pressure, and oxygen: These are essential survival needs. Nutrients and water provide energy and materials for cellular processes, oxygen is required for aerobic metabolism, and atmospheric pressure ensures proper gas exchange in the lungs.
D. Water, atmospheric pressure, growth, and movement: While water and atmospheric pressure are essential, growth and movement are not immediate survival needs and do not directly sustain life functions.
Correct Answer is A
Explanation
A. Contact: Contact signaling involves direct physical interaction between cell surface receptors and ligands on adjacent cells. This allows cells to recognize one another, which is crucial for tissue development, immune responses, and maintaining cellular organization.
B. Chemical: Chemical signaling involves the release of signaling molecules (like hormones or neurotransmitters) that travel to target cells, often over a distance. While important, it does not involve direct cell-to-cell recognition as contact signaling does.
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