Biology Flashcards: Connect Synthesis To Cell Function

What this deck covers

This deck focuses on Connect Synthesis To Cell Function, giving you a quick way to review the definitions, rules, and examples that matter most for Biology.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: What is dehydration synthesis and which bond does it form between monosaccharides?

Answer: Removal of water to form a glycosidic bond. This process links monosaccharides into larger carbohydrates.

Flashcard 2: What is the difference between introns and exons in eukaryotic gene expression?

Answer: Introns are removed; exons remain in the mature mRNA. This processing step refines the mRNA before translation.

Flashcard 3: What is the central dogma that links molecular synthesis to cellular function?

Answer: DNA is transcribed to RNA, and RNA is translated to protein. This fundamental principle describes the flow of genetic information in cells.

Flashcard 4: What is a codon and how does it connect nucleic acid sequence to protein function?

Answer: A 3-base mRNA sequence that specifies an amino acid or stop. The genetic code links DNA sequence to protein amino acid sequence.

Flashcard 5: What is the role of rRNA in translation?

Answer: It forms the ribosome and catalyzes peptide bond formation. rRNA is both structural and enzymatic component of ribosomes.

Flashcard 6: What is a transcription factor and how does it connect signals to gene expression?

Answer: A regulatory protein that increases or decreases transcription. These proteins regulate gene expression in response to cellular needs.

Flashcard 7: What is the primary function of ribosomes in all cells?

Answer: Protein synthesis by translation. Ribosomes are the universal protein-making machines of cells.

Flashcard 8: Identify the polysaccharide synthesized for plant cell wall structure.

Answer: Cellulose. This structural polysaccharide provides plant cell rigidity.

Flashcard 9: Which base in RNA replaces thymine and how does that affect transcription products?

Answer: Uracil (U) replaces thymine (T) in RNA. This base-pairing difference distinguishes RNA from DNA structure.

Flashcard 10: What is a chaperone protein and how does it connect synthesis to function?

Answer: A protein that assists correct folding to achieve functional shape. Chaperones prevent misfolding and ensure proper protein structure.

Flashcard 11: Which macromolecule class is synthesized for short-term energy storage and cell ID?

Answer: Carbohydrates. These molecules provide quick energy and cellular recognition.

Flashcard 12: What is a gene in the context of molecular synthesis and cellular function?

Answer: A DNA sequence that encodes a functional RNA or protein product. Genes are the basic units of heredity that direct cell functions.

Flashcard 13: Which macromolecule class is synthesized to provide structure and catalysis?

Answer: Proteins. Proteins perform most cellular work including catalysis and structure.

Flashcard 14: What is a transcription factor and how does it connect signals to gene expression?

Answer: A regulatory protein that increases or decreases transcription. These proteins regulate gene expression in response to cellular needs.

Flashcard 15: What is the main cellular consequence of a change in a protein's amino acid sequence?

Answer: Altered folding and function, potentially changing cell phenotype. Protein shape changes can disrupt enzyme activity or binding.

Flashcard 16: What is RNA polymerase and what synthesis step does it catalyze?

Answer: An enzyme that synthesizes RNA during transcription. This enzyme catalyzes the formation of RNA from DNA template.

Flashcard 17: What type of bond links amino acids during protein synthesis?

Answer: Peptide bonds. These covalent bonds connect amino acids in the protein backbone.

Flashcard 18: What is the function of the poly-A tail on eukaryotic mRNA?

Answer: It increases mRNA stability and supports translation efficiency. The poly-A tail enhances mRNA lifespan and translation rate.

Flashcard 19: What is transcription in terms of molecular synthesis?

Answer: Synthesis of RNA from a DNA template. RNA polymerase reads DNA template to create complementary RNA strand.

Flashcard 20: Identify the polysaccharide synthesized for plant cell wall structure.

Answer: Cellulose. This structural polysaccharide provides plant cell rigidity.

Flashcard 21: What is ATP synthase and what cellular function does it support directly?

Answer: An enzyme that makes ATP, supporting energy-requiring processes. This enzyme is crucial for cellular energy metabolism.

Flashcard 22: Which organelle modifies, sorts, and packages proteins after synthesis?

Answer: The Golgi apparatus. The Golgi processes proteins after rough ER synthesis.

Flashcard 23: What is a gene in the context of molecular synthesis and cellular function?

Answer: A DNA sequence that encodes a functional RNA or protein product. Genes are the basic units of heredity that direct cell functions.

Flashcard 24: Which macromolecule class is synthesized by dehydration reactions to store genetic info?

Answer: Nucleic acids (DNA and RNA). These polymers store and transmit hereditary information.

Flashcard 25: What is a codon and how does it connect nucleic acid sequence to protein function?

Answer: A 3-base mRNA sequence that specifies an amino acid or stop. The genetic code links DNA sequence to protein amino acid sequence.

Flashcard 26: What type of bond links amino acids during protein synthesis?

Answer: Peptide bonds. These covalent bonds connect amino acids in the protein backbone.

Flashcard 27: What is the role of mRNA in connecting gene sequence to cell function?

Answer: It carries the coding information from DNA to ribosomes. mRNA acts as a messenger between nuclear DNA and cytoplasmic ribosomes.

Flashcard 28: What is phosphorylation and what common effect does it have on proteins?

Answer: Addition of a phosphate group that often changes protein activity. Phosphorylation is a key mechanism for regulating protein function.

Flashcard 29: Which macromolecule class is synthesized to form membranes and influence transport?

Answer: Lipids (especially phospholipids). These molecules create cellular boundaries and compartments.

Flashcard 30: What is the function of the lac operon when lactose is present?

Answer: It induces enzymes needed to import and metabolize lactose. The lac operon enables bacteria to respond to lactose availability.

Flashcard 31: What is a chaperone protein and how does it connect synthesis to function?

Answer: A protein that assists correct folding to achieve functional shape. Chaperones prevent misfolding and ensure proper protein structure.

Flashcard 32: What is hydrolysis and what is its effect on polymers in cells?

Answer: Addition of water to break polymers into monomers. This process breaks down macromolecules for cellular use.

Flashcard 33: What is the central dogma that links molecular synthesis to cellular function?

Answer: DNA is transcribed to RNA, and RNA is translated to protein. This fundamental principle describes the flow of genetic information in cells.

Flashcard 34: Which macromolecule class is synthesized by dehydration reactions to store genetic info?

Answer: Nucleic acids (DNA and RNA). These polymers store and transmit hereditary information.

Flashcard 35: What is the start codon used to initiate translation in most organisms?

Answer: AUG (codes for methionine). This universal start signal ensures proper translation initiation.

Flashcard 36: What level of protein structure is determined directly by the amino acid sequence?

Answer: Primary structure. The amino acid sequence directly determines all higher protein structures.

Flashcard 37: What is the direct product of translation that can affect cell structure and function?

Answer: A polypeptide (protein primary structure). This linear chain of amino acids determines protein folding and function.

Flashcard 38: Identify the polysaccharide synthesized for energy storage in plants.

Answer: Starch. Plants synthesize starch in chloroplasts and amyloplasts.

Flashcard 39: Identify the molecule synthesized to store energy long-term in many animals.

Answer: Triglycerides (fats). These lipids store more energy per gram than carbohydrates.

Flashcard 40: What is transcription in terms of molecular synthesis?

Answer: Synthesis of RNA from a DNA template. RNA polymerase reads DNA template to create complementary RNA strand.

Flashcard 41: What is the role of tRNA in protein synthesis and cellular function?

Answer: It matches anticodons to codons and delivers amino acids. tRNA serves as the adapter molecule in the genetic code translation.

Flashcard 42: Which organelle synthesizes proteins destined for secretion or membranes?

Answer: Ribosomes bound to rough endoplasmic reticulum. The rough ER directs proteins to secretory or membrane pathways.

Flashcard 43: What is a signal peptide and what does it determine about a protein's function?

Answer: An amino acid tag that directs a protein to a specific location. Signal sequences target proteins to their proper cellular destinations.

Flashcard 44: What is an enhancer and what is its effect on molecular synthesis?

Answer: A DNA element that increases transcription when bound by activators. Enhancers can work from distant locations to boost transcription.

Flashcard 45: What is the function of a stop codon in translation?

Answer: It signals termination of translation and release of the polypeptide. UAA, UAG, and UGA codons halt translation when reached.

Flashcard 46: What is RNA polymerase and what synthesis step does it catalyze?

Answer: An enzyme that synthesizes RNA during transcription. This enzyme catalyzes the formation of RNA from DNA template.

Flashcard 47: What is the role of mRNA in connecting gene sequence to cell function?

Answer: It carries the coding information from DNA to ribosomes. mRNA acts as a messenger between nuclear DNA and cytoplasmic ribosomes.

Flashcard 48: Which macromolecule class is synthesized to form membranes and influence transport?

Answer: Lipids (especially phospholipids). These molecules create cellular boundaries and compartments.

Flashcard 49: What is ATP synthase and what cellular function does it support directly?

Answer: An enzyme that makes ATP, supporting energy-requiring processes. This enzyme is crucial for cellular energy metabolism.

Flashcard 50: Which organelle is the primary site of protein synthesis for cytosolic proteins?

Answer: Free ribosomes in the cytosol. These ribosomes make proteins that function within the cytoplasm.

Flashcard 51: What is feedback inhibition and how does it connect enzyme function to synthesis?

Answer: An end product inhibits an early enzyme to regulate pathway output. This mechanism prevents overproduction of metabolic products.

Flashcard 52: What is the function of the 5' cap on eukaryotic mRNA?

Answer: It protects mRNA and helps ribosome binding for translation. The 5' cap is essential for mRNA stability and translation initiation.

Flashcard 53: What is alternative splicing and how can it change cellular function?

Answer: Different exon combinations produce different proteins from one gene. This process increases protein diversity from a single gene.

Flashcard 54: What is the difference between introns and exons in eukaryotic gene expression?

Answer: Introns are removed; exons remain in the mature mRNA. This processing step refines the mRNA before translation.

Flashcard 55: What is an operon and what cellular advantage does it provide in prokaryotes?

Answer: A set of genes regulated together for coordinated expression. This allows efficient coordinate regulation of related genes.

Flashcard 56: What is an enhancer and what is its effect on molecular synthesis?

Answer: A DNA element that increases transcription when bound by activators. Enhancers can work from distant locations to boost transcription.

Flashcard 57: What is translation in terms of molecular synthesis?

Answer: Synthesis of a polypeptide using an mRNA template. Ribosomes decode mRNA codons to assemble amino acids into proteins.

Flashcard 58: What level of protein structure is determined directly by the amino acid sequence?

Answer: Primary structure. The amino acid sequence directly determines all higher protein structures.

Flashcard 59: What is the function of a stop codon in translation?

Answer: It signals termination of translation and release of the polypeptide. UAA, UAG, and UGA codons halt translation when reached.

Flashcard 60: What is the function of the poly-A tail on eukaryotic mRNA?

Answer: It increases mRNA stability and supports translation efficiency. The poly-A tail enhances mRNA lifespan and translation rate.

Flashcard 61: What is a signal peptide and what does it determine about a protein's function?

Answer: An amino acid tag that directs a protein to a specific location. Signal sequences target proteins to their proper cellular destinations.

Flashcard 62: Identify the molecule synthesized to store energy long-term in many animals.

Answer: Triglycerides (fats). These lipids store more energy per gram than carbohydrates.

Flashcard 63: Identify the polysaccharide synthesized for energy storage in plants.

Answer: Starch. Plants synthesize starch in chloroplasts and amyloplasts.

Flashcard 64: Which base in RNA replaces thymine and how does that affect transcription products?

Answer: Uracil (U) replaces thymine (T) in RNA. This base-pairing difference distinguishes RNA from DNA structure.

Flashcard 65: What is ubiquitination and what cellular process does it commonly trigger?

Answer: Protein tagging that targets proteins for proteasome degradation. This modification marks proteins for controlled degradation.

Flashcard 66: What is a promoter and how does it influence cellular function?

Answer: A DNA region where RNA polymerase binds to start transcription. Promoters control when and how much RNA is transcribed.

Flashcard 67: What is the role of rRNA in translation?

Answer: It forms the ribosome and catalyzes peptide bond formation. rRNA is both structural and enzymatic component of ribosomes.

Flashcard 68: What is ubiquitination and what cellular process does it commonly trigger?

Answer: Protein tagging that targets proteins for proteasome degradation. This modification marks proteins for controlled degradation.

Flashcard 69: Identify the polysaccharide synthesized for energy storage in animals.

Answer: Glycogen. Animals store glycogen primarily in liver and muscle.

Flashcard 70: What is the main cellular consequence of a change in a protein's amino acid sequence?

Answer: Altered folding and function, potentially changing cell phenotype. Protein shape changes can disrupt enzyme activity or binding.

Flashcard 71: What is the main function of cholesterol in animal cell membranes?

Answer: It modulates membrane fluidity and stability. Cholesterol helps maintain optimal membrane properties.

Flashcard 72: Which macromolecule class is synthesized to provide structure and catalysis?

Answer: Proteins. Proteins perform most cellular work including catalysis and structure.

Flashcard 73: What is post-translational modification and why does it matter for cell function?

Answer: Chemical changes to proteins that regulate activity, location, or stability. These modifications fine-tune protein activity after synthesis.

Flashcard 74: What is dehydration synthesis and which bond does it form between monosaccharides?

Answer: Removal of water to form a glycosidic bond. This process links monosaccharides into larger carbohydrates.

Flashcard 75: What is a membrane protein and what is one core cellular role it can perform?

Answer: A protein in the lipid bilayer that mediates transport or signaling. These proteins control what enters and exits the cell.

Flashcard 76: What is the direct product of translation that can affect cell structure and function?

Answer: A polypeptide (protein primary structure). This linear chain of amino acids determines protein folding and function.

Flashcard 77: What is an enzyme and how does its synthesis affect cellular metabolism?

Answer: A biological catalyst; more enzyme can increase pathway rate. Enzyme concentration directly affects metabolic pathway rates.

Flashcard 78: What is alternative splicing and how can it change cellular function?

Answer: Different exon combinations produce different proteins from one gene. This process increases protein diversity from a single gene.

Flashcard 79: Which organelle synthesizes proteins destined for secretion or membranes?

Answer: Ribosomes bound to rough endoplasmic reticulum. The rough ER directs proteins to secretory or membrane pathways.

Flashcard 80: Identify the polysaccharide synthesized for energy storage in animals.

Answer: Glycogen. Animals store glycogen primarily in liver and muscle.

Flashcard 81: What is the main function of cholesterol in animal cell membranes?

Answer: It modulates membrane fluidity and stability. Cholesterol helps maintain optimal membrane properties.

Flashcard 82: What is post-translational modification and why does it matter for cell function?

Answer: Chemical changes to proteins that regulate activity, location, or stability. These modifications fine-tune protein activity after synthesis.

Flashcard 83: What is the function of the lac operon when lactose is present?

Answer: It induces enzymes needed to import and metabolize lactose. The lac operon enables bacteria to respond to lactose availability.

Flashcard 84: Which macromolecule class is synthesized for short-term energy storage and cell ID?

Answer: Carbohydrates. These molecules provide quick energy and cellular recognition.

Flashcard 85: What is an operon and what cellular advantage does it provide in prokaryotes?

Answer: A set of genes regulated together for coordinated expression. This allows efficient coordinate regulation of related genes.

Flashcard 86: What is the role of tRNA in protein synthesis and cellular function?

Answer: It matches anticodons to codons and delivers amino acids. tRNA serves as the adapter molecule in the genetic code translation.

Flashcard 87: Which option best connects a DNA mutation to altered cell function: silent, missense, or nonsense mutation?

Answer: Nonsense mutation (introduces a premature stop codon). Nonsense mutations create truncated, usually nonfunctional proteins.

Flashcard 88: What is phosphorylation and what common effect does it have on proteins?

Answer: Addition of a phosphate group that often changes protein activity. Phosphorylation is a key mechanism for regulating protein function.

Flashcard 89: Which organelle is the primary site of protein synthesis for cytosolic proteins?

Answer: Free ribosomes in the cytosol. These ribosomes make proteins that function within the cytoplasm.

Flashcard 90: What is feedback inhibition and how does it connect enzyme function to synthesis?

Answer: An end product inhibits an early enzyme to regulate pathway output. This mechanism prevents overproduction of metabolic products.

Flashcard 91: What is a membrane protein and what is one core cellular role it can perform?

Answer: A protein in the lipid bilayer that mediates transport or signaling. These proteins control what enters and exits the cell.

Flashcard 92: What is hydrolysis and what is its effect on polymers in cells?

Answer: Addition of water to break polymers into monomers. This process breaks down macromolecules for cellular use.

Flashcard 93: What is an enzyme and how does its synthesis affect cellular metabolism?

Answer: A biological catalyst; more enzyme can increase pathway rate. Enzyme concentration directly affects metabolic pathway rates.

Flashcard 94: What is a promoter and how does it influence cellular function?

Answer: A DNA region where RNA polymerase binds to start transcription. Promoters control when and how much RNA is transcribed.

Flashcard 95: What is the function of the 5' cap on eukaryotic mRNA?

Answer: It protects mRNA and helps ribosome binding for translation. The 5' cap is essential for mRNA stability and translation initiation.

Flashcard 96: Which organelle modifies, sorts, and packages proteins after synthesis?

Answer: The Golgi apparatus. The Golgi processes proteins after rough ER synthesis.

Flashcard 97: What is the start codon used to initiate translation in most organisms?

Answer: AUG (codes for methionine). This universal start signal ensures proper translation initiation.

Flashcard 98: What is the primary function of ribosomes in all cells?

Answer: Protein synthesis by translation. Ribosomes are the universal protein-making machines of cells.

Flashcard 99: What is translation in terms of molecular synthesis?

Answer: Synthesis of a polypeptide using an mRNA template. Ribosomes decode mRNA codons to assemble amino acids into proteins.