AP Bio 1.3 Introduction to Biological Macromolecules
42 flashcards covering AP Bio 1.3 Introduction to Biological Macromolecules for the AP-BIOLOGY Unit 1 section.
This topic covers the fundamental concepts of biological macromolecules, including carbohydrates, proteins, lipids, and nucleic acids, as outlined in the AP Biology Curriculum Framework. Understanding these macromolecules is essential for grasping the biochemical processes that underlie cellular functions and life itself.
In practice exams and competency assessments, questions about biological macromolecules often focus on their structures, functions, and roles in metabolism. Common question formats include multiple-choice questions that ask for identification or comparison of macromolecules, as well as free-response questions that require explanations of their significance in biological systems. A frequent pitfall is confusing the functions of similar macromolecules, such as distinguishing between the roles of different types of proteins or recognizing the specific characteristics that differentiate saturated and unsaturated fats.
In real-world applications, professionals sometimes overlook the importance of understanding how macromolecules interact with one another in metabolic pathways, which can be critical for effective problem-solving in clinical scenarios.
Terms (42)
- 01
What are the four major types of biological macromolecules?
The four major types of biological macromolecules are carbohydrates, lipids, proteins, and nucleic acids, each serving unique functions in living organisms (College Board AP CED).
- 02
Which type of macromolecule is primarily responsible for storing genetic information?
Nucleic acids, specifically DNA, are primarily responsible for storing genetic information in organisms (College Board AP CED).
- 03
What is the basic building block of proteins?
The basic building block of proteins is amino acids, which link together to form polypeptides through peptide bonds (College Board AP CED).
- 04
How do enzymes function as biological catalysts?
Enzymes function as biological catalysts by lowering the activation energy of reactions, thus increasing the rate of the reaction without being consumed (College Board AP CED).
- 05
What is the primary function of carbohydrates in living organisms?
The primary function of carbohydrates is to provide energy and serve as structural components in cells (College Board AP CED).
- 06
What are lipids primarily composed of?
Lipids are primarily composed of fatty acids and glycerol, and they are hydrophobic in nature (College Board AP CED).
- 07
How are nucleotides related to nucleic acids?
Nucleotides are the monomer units that make up nucleic acids, such as DNA and RNA (College Board AP CED).
- 08
What role do phospholipids play in cellular structures?
Phospholipids are essential for forming cell membranes, creating a bilayer that separates the interior of the cell from the external environment (College Board AP CED).
- 09
What is the difference between saturated and unsaturated fats?
Saturated fats contain no double bonds between carbon atoms, while unsaturated fats contain one or more double bonds, affecting their physical properties (College Board AP CED).
- 10
Which macromolecule is involved in the immune response?
Proteins, particularly antibodies, are involved in the immune response by identifying and neutralizing pathogens (College Board AP CED).
- 11
What is the function of RNA in cells?
RNA plays several roles in cells, including serving as a messenger between DNA and ribosomes for protein synthesis (College Board AP CED).
- 12
What is a glycosidic bond?
A glycosidic bond is a type of covalent bond that links monosaccharides together to form polysaccharides (College Board AP CED).
- 13
How do the structures of starch and cellulose differ?
Starch is a storage polysaccharide with a helical structure, while cellulose is a structural polysaccharide with a linear arrangement of glucose units (College Board AP CED).
- 14
What is the role of cholesterol in biological membranes?
Cholesterol helps to stabilize the fluidity of biological membranes, making them less permeable to very small water-soluble molecules (College Board AP CED).
- 15
How are peptide bonds formed between amino acids?
Peptide bonds are formed through a dehydration synthesis reaction, where a water molecule is released as two amino acids bond (College Board AP CED).
- 16
What is the significance of the primary structure of proteins?
The primary structure of a protein, which is its unique sequence of amino acids, determines its overall shape and function (College Board AP CED).
- 17
What type of reaction breaks down macromolecules into their monomers?
Hydrolysis reactions break down macromolecules into their monomers by adding water (College Board AP CED).
- 18
What is the function of carbohydrates in cell recognition?
Carbohydrates on the cell surface play a key role in cell recognition and signaling, acting as identification markers (College Board AP CED).
- 19
How do enzymes achieve specificity for their substrates?
Enzymes achieve specificity for their substrates through the unique shape of their active sites, which only fit specific substrates (College Board AP CED).
- 20
What is the role of RNA polymerase in protein synthesis?
RNA polymerase synthesizes RNA from a DNA template during the process of transcription, which is the first step of protein synthesis (College Board AP CED).
- 21
What are the structural differences between DNA and RNA?
DNA is double-stranded and contains deoxyribose sugar, while RNA is single-stranded and contains ribose sugar (College Board AP CED).
- 22
What is the function of triglycerides in organisms?
Triglycerides serve as long-term energy storage molecules and provide insulation and protection for organs (College Board AP CED).
- 23
What type of bond forms between the glycerol and fatty acids in lipids?
Ester bonds form between glycerol and fatty acids in lipids, linking them together (College Board AP CED).
- 24
How do competitive inhibitors affect enzyme activity?
Competitive inhibitors decrease enzyme activity by binding to the active site, preventing substrate binding (College Board AP CED).
- 25
What is the role of the ribosome in protein synthesis?
Ribosomes are the cellular machinery that synthesizes proteins by translating mRNA into a polypeptide chain (College Board AP CED).
- 26
What is the significance of secondary structure in proteins?
Secondary structure refers to localized folding of the polypeptide chain into alpha helices and beta sheets, which are stabilized by hydrogen bonds (College Board AP CED).
- 27
How do polysaccharides differ from simple sugars?
Polysaccharides are long chains of monosaccharides linked by glycosidic bonds, while simple sugars are single sugar molecules (monosaccharides) (College Board AP CED).
- 28
What is the function of enzymes in metabolic pathways?
Enzymes catalyze reactions in metabolic pathways, allowing biochemical processes to occur at a faster rate and under milder conditions (College Board AP CED).
- 29
What is the role of the active site in enzyme function?
The active site is the region of the enzyme where substrate molecules bind and undergo a chemical reaction (College Board AP CED).
- 30
How does temperature affect enzyme activity?
Temperature affects enzyme activity by influencing the kinetic energy of molecules; higher temperatures can increase activity up to an optimal point, beyond which activity declines (College Board AP CED).
- 31
What is the primary function of nucleic acids in cells?
The primary function of nucleic acids is to store and transmit genetic information (College Board AP CED).
- 32
What is the difference between DNA replication and transcription?
DNA replication copies the entire DNA molecule, while transcription synthesizes RNA from a DNA template (College Board AP CED).
- 33
What is the significance of tertiary structure in proteins?
Tertiary structure refers to the overall three-dimensional shape of a protein, which is crucial for its function (College Board AP CED).
- 34
How do carbohydrates contribute to energy storage?
Carbohydrates, particularly in the form of glycogen and starch, serve as energy storage molecules in organisms (College Board AP CED).
- 35
What is the role of chaperone proteins in cellular function?
Chaperone proteins assist in the proper folding of other proteins, preventing misfolding and aggregation (College Board AP CED).
- 36
What is the difference between essential and non-essential amino acids?
Essential amino acids cannot be synthesized by the body and must be obtained from the diet, while non-essential amino acids can be synthesized (College Board AP CED).
- 37
What is the role of hydrogen bonds in the structure of proteins?
Hydrogen bonds stabilize the secondary and tertiary structures of proteins, contributing to their overall shape (College Board AP CED).
- 38
How do nonpolar amino acids affect protein structure?
Nonpolar amino acids tend to cluster in the interior of proteins, away from water, influencing the protein's overall shape and stability (College Board AP CED).
- 39
What is the significance of the quaternary structure of proteins?
Quaternary structure refers to the assembly of multiple polypeptide chains into a functional protein, which is essential for the activity of many proteins (College Board AP CED).
- 40
What are the roles of ribonucleic acid (RNA) in protein synthesis?
RNA plays roles in transcription (mRNA), translation (tRNA), and ribosomal structure (rRNA) during protein synthesis (College Board AP CED).
- 41
How do enzymes lower activation energy?
Enzymes lower activation energy by providing an alternative reaction pathway and stabilizing the transition state (College Board AP CED).
- 42
What is the role of the cell membrane in relation to lipids?
The cell membrane is composed mainly of a phospholipid bilayer, which provides a barrier and regulates the movement of substances in and out of the cell (College Board AP CED).