The basic structural material that most of the body consists of are ________.
proteins
carbohydrates
lipids
nucleic acids
The Correct Answer is A
A. Proteins: Proteins serve as the primary structural components of cells and tissues. They form muscles, connective tissue, enzymes, and cell membranes, providing strength, support, and functional versatility throughout the body.
B. Carbohydrates: Carbohydrates primarily provide energy and serve as short-term fuel and structural components like glycogen, but they are not the main structural material of the body.
C. Lipids: Lipids function as energy storage, insulation, and components of cell membranes, but they do not provide the bulk structural framework of tissues.
D. Nucleic acids: Nucleic acids such as DNA and RNA store and transmit genetic information but do not serve as the primary structural material for the body.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Nitrogen base, pentose sugar, and phosphate group: Nucleotides are the building blocks of nucleic acids. Each nucleotide consists of a nitrogenous base (adenine, thymine, cytosine, guanine, or uracil), a five-carbon (pentose) sugar (ribose or deoxyribose), and one or more phosphate groups.
B. Nitrogen base, polysaccharide sugar, and phosphate group: Polysaccharides are long chains of sugars and are not components of nucleotides. Nucleotides contain a single pentose sugar, not a complex sugar.
C. Nitrogen base, disaccharide sugar, phosphate group: Disaccharides consist of two monosaccharides linked together and are not part of nucleotide structure.
D. Nitrogen base, hexose sugar, and phosphate group: Hexose sugars have six carbons, whereas nucleotides always contain a five-carbon pentose sugar.
Correct Answer is D
Explanation
A. 10: If atom X has 17 protons, it is chlorine. Its total electrons in the neutral state are also 17. Having 10 electrons in the valence shell would be impossible, since the outermost shell of chlorine can hold only up to 8 electrons.
B. 3: Three valence electrons are characteristic of elements in Group 13, such as aluminum. Chlorine belongs to Group 17, so it does not have three electrons in its outer shell.
C. 5: Five valence electrons correspond to elements in Group 15, such as nitrogen or phosphorus. Since chlorine is in Group 17, it cannot have five electrons in its valence shell.
D. 7: Chlorine has an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁵, which totals 7 electrons in its outermost shell. This matches its placement in Group 17, making 7 the correct number of valence electrons.
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.