Essential Knowledge 2.A.3 and 4.A.1 - Biological Matter Exchange and Polymer Structure-Function

Sep 22, 2026

Uploaded by Patrick

Essential Knowledge 2.A.3 explains how living organisms exchange matter with the environment to grow, reproduce, and maintain organization, including how carbon, nitrogen, and phosphorus move into biological building processes. The text lists student objectives focused on water’s properties and core functions of elements in carbohydrates, proteins, lipids, nucleic acids, and phospholipids. Essential Knowledge 4.A.1 details how monomer subcomponents and their sequences determine biological molecule properties, covering nucleic acids, proteins, lipids, and carbohydrates, including how directionality shapes structure and function.

LanguageEnglish

CategoryExam

FormatPDF

Pages53

Reading Time2 h 14 min

AccessFree to download

Essential Knowledge 2.A.3

Student learning evidence: carbon, nitrogen, phosphorus

Student objectives: water properties and elemental roles

Enduring understanding 4.A

Essential knowledge 4.A.1: sequences and structure-function

Evidence: nucleic acids, proteins, lipids, carbohydrates

Directionality and polymer structure-function

Learning objectives

matter. Essential knowledge 2.A.3: Organisms must exchange matter with the environment to grow, reproduce and maintain organization. a. Molecules and atoms from the environment are necessary to build new molecules. Evidence of student learning is a demonstrated understanding of each of the following: 1. Carbon moves from the environment to organisms where it is used to build carbohydrates, proteins, lipids or nucleic acids. Carbon is used in storage compounds and cell formation in all organisms. 2. Nitrogen moves from the environment to organisms where it is used in building proteins and nucleic acids. 3. Phosphorus moves from the environment to organisms where it is used in nucleic acids and certain lipids. student objectives: 4. Living systems depend on properties of water that result from its polarity and hydrogen bonding. To demonstrate understanding of this concept, be able to explain water’s: ● Cohesion ● Adhesion ● High specific heat capacity ● Universal solvent supports reactions ● Heat of vaporization ● Heat of fusion ● thermal conductivity student objectives: ● why is matter necessary for biological systems? ● explain the uses of carbon, hydrogen, oxygen, nitrogen, phosphorous and sulfur in biological systems. ● Diagram the exchange of matter between organisms and the environment. ● what function does nitrogen serve in proteins? In nucleic acids? ● what function does phosphorus serve in nucleic acids? In phospholipids? ● Why do biological systems need water? ● How does the structure of a water molecule relate to its function(s)? ● How does the polarity of water lead to the emergence of unique properties in liquid water? Enduring understanding 4.A: Interactions within biological systems lead to complex properties. Essential knowledge 4.A.1: The subcomponents of biological molecules and their sequence determine the properties of that molecule. a. Structure and function of polymers are derived from the way their monomers are assembled. Evidence of student learning is a demonstrated understanding of each of the following: 1. In nucleic acids, biological information is encoded in sequences of nucleotide monomers. Each nucleotide has structural components: a five-carbon sugar (deoxyribose or ribose), a phosphate and a nitrogen base (adenine, thymine, guanine, cytosine or uracil) . DNA and RNA differ in function and differ slightly in structure, and these structural differences account for the differing functions. 2. In proteins, the specific order of amino acids in a polypeptide (primary structure) interacts with the environment to determine the overall shape of the protein, which also involves secondary tertiary and quaternary structure and, thus, its function. The R group of an amino acid can be categorized by chemical properties (hydrophobic, hydrophilic and ionic), and the interactions of these R groups determine structure and function of that region of the protein. 3. In general, lipids are nonpolar; however, phospholipids exhibit structural properties, with polar regions that interact with other polar molecules such as water, and with nonpolar regions where differences in saturation determine the structure and function of lipids. 4. Carbohydrates are composed of sugar monomers whose structures and bonding with each other by dehydration synthesis determine the properties and functions of the molecules. Illustrative examples include: cellulose versus starch. b. Directionality influences structure and function of the polymer. Evidence of student learning is a demonstrated understanding of each of the following: 1. Nucleic acids have ends, defined by the 3' and 5' carbons of the sugar in the nucleotide, that determine the direction in which complementary nucleotides are added during DNA synthesis and the direction in which transcription occurs (from 5' to 3') . 2. Proteins have an amino (NH2) end and a carboxyl (COOH) end, and consist of a linear seq

FAQs

Why must organisms exchange matter with the environment to grow and maintain organization?

Living systems require molecules from the environment to build new cellular components. The document emphasizes that matter exchange is necessary for growth, reproduction, and sustaining organization.

How do carbon, nitrogen, and phosphorus contribute to biological molecules?

Carbon is used to build carbohydrates, proteins, lipids, or nucleic acids. Nitrogen supports proteins and nucleic acids, while phosphorus supports nucleic acids and certain lipids.

How do sequences and directionality determine the properties and functions of biological polymers?

For nucleic acids, information is encoded in sequences of nucleotide monomers, and ends define direction during synthesis and transcription. For proteins, amino acid order determines overall shape and interacting structures, while carbohydrate bonding and polymer directionality determine orientation and secondary structure.

Sep 22, 2026

Uploaded by Patrick