Scelta multipla
Which of the following lists correctly identifies the five monomer units (nucleobases) found in nucleic acids?
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1. Introduction to Biochemistry
Nucleic Acids
Scelta multipla
Molecules of DNA are composed of long chains of which of the following?
A
Amino acids
B
Monosaccharides
C
Fatty acids
D
Nucleotides
Guida verificata passo dopo passo1
Step 1: Understand the structure of DNA. DNA (Deoxyribonucleic Acid) is a macromolecule that serves as the genetic material in most organisms. It is composed of repeating units called nucleotides.
Step 2: Recall the components of a nucleotide. Each nucleotide consists of three parts: a phosphate group, a sugar molecule (deoxyribose in DNA), and a nitrogenous base (adenine, thymine, cytosine, or guanine).
Step 3: Differentiate between the options provided. Amino acids are the building blocks of proteins, monosaccharides are simple sugars, and fatty acids are components of lipids. None of these are part of the DNA structure.
Step 4: Recognize that nucleotides are the correct answer. Nucleotides are the fundamental units that form the long chains in DNA through phosphodiester bonds, creating the backbone of the molecule.
Step 5: Conclude that DNA is composed of long chains of nucleotides, which are linked together to form the double helix structure characteristic of DNA.
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