NURS 5301 Test 1 Question Bank

Chapter 1 It is true that a eukaryotic cell contains structures called organelles. Correct The function of a histone found in a eukaryote cell focuses on cellular deoxyribonucleic acid (DNA) folding. Correct The histones are binding proteins that cause the supercoiling of DNA into chromosomes and do not affect cellular division, movement, or activities. An organelle that is responsible for the metabolism of cellular energy is referred to as a/an mitochondrion. Correct Mitochondria play a role in cellular metabolism, cellular respiration, and energy production. The Golgi complex is responsible for processing and packaging proteins from the endoplasmic reticulum, where they are synthesized. The nucleolus is a small, dense structure that contains the ribonucleic acid (RNA), DNA, and DNA-binding proteins. Which statement best describes a desmosome? Desmosomes hold cells together by continuous bands. Correct The desmosome is a type of cell junction. The other two types include tight junctions and gap junctions. Desmosomes hold cells together by forming a continuous band of epithelial tissue or belt (or button-like) points of contact. They are also a source of structural stability. Tight junctions serve as barriers to diffusion and prevent the movement of substances through transport proteins. Gap junctions are clusters of communicating tunnels. Which statement describes the function of a second messenger? Triggers a cascade of intracellular events Correct The binding