Explain Atom Rearrangement in Synthesis - Biology

What is meant by "atoms are rearranged" during macromolecule synthesis?

Atoms are conserved but recombined into new covalent bonds. Existing atoms form new molecular arrangements and bonds.
What type of bond links glycerol to fatty acids in a triglyceride?

Ester bond (ester linkage). Forms between glycerol hydroxyl and fatty acid carboxyl.
Which macromolecule class is primarily assembled from glycerol and fatty acids?

Lipids (for example, triglycerides and phospholipids). Glycerol backbone connects to fatty acid chains.
Find the correct term: Building a protein from amino acids is an example of what process?

Dehydration synthesis (polymerization). Links monomers through dehydration synthesis reactions.
Which process typically requires enzymes to occur efficiently in cells: dehydration or hydrolysis?

Both reactions are enzyme-catalyzed in cells. Enzymes catalyze both synthesis and breakdown reactions.
What is the immediate product when glycerol bonds with three fatty acids via dehydration synthesis?

A triglyceride (triacylglycerol). Three ester bonds link glycerol to fatty acids.
What is the general name for enzymes that break polymers into monomers by hydrolysis?

Hydrolases (digestive enzymes). Catalyze hydrolysis to break down polymers.
Which reaction forms a disaccharide from two monosaccharides?

Dehydration synthesis forming a glycosidic bond. Links two sugar molecules removing water.
What is the general name for enzymes that build polymers from monomers?

Synthases or polymerases (depending on the polymer type). Catalyze dehydration synthesis to build polymers.
Which element is always present in proteins but not in carbohydrates and typical lipids?

Nitrogen (N). Essential for amino groups in amino acid structure.
Which type of chemical reaction links monomers by removing water to build a macromolecule?

Dehydration synthesis (condensation reaction). Removes $H_2O$ between monomers to form covalent bonds.
Which principle states that atoms are not created or destroyed in chemical reactions?

Conservation of mass (matter). Atoms cannot be created or destroyed in reactions.
What molecule is released when two monomers join during dehydration synthesis?

Water ( $H_2O$ ). Formed when $H$ from one monomer joins $OH$ from another.
What is the main structural difference between triglycerides and phospholipids?

Phospholipids have a phosphate group replacing one fatty acid. Creates amphipathic molecules for membranes.
Which reaction breaks a disaccharide into two monosaccharides?

Hydrolysis breaking a glycosidic bond. Adds water to separate the sugar molecules.
Which functional groups react to form an ester bond in lipid formation?

Hydroxyl group and carboxyl group. Glycerol $OH$ reacts with fatty acid $COOH$ group.
Which macromolecule class is built from monosaccharide monomers?

Carbohydrates. Simple sugars link to form complex carbohydrates.
What is the polymer called when amino acids are linked into a chain?

Polypeptide (protein when folded and functional). Amino acid chain that folds into functional protein.
Identify the structural polysaccharide formed from glucose monomers in plant cell walls.

Cellulose. Provides rigid structure to plant cell walls.
What covalent bond forms in the sugar-phosphate backbone of nucleic acids?

Phosphodiester bond. Connects phosphate to sugar creating the DNA/RNA backbone.
Which elements are most common in carbohydrates and lipids?

Carbon, hydrogen, and oxygen (C, H, O). Primary elements in energy storage and structural molecules.
Which reaction type is commonly used in digestion of macromolecules?

Hydrolysis. Breaks down food polymers into absorbable monomers.
Identify the polymer formed when many glucose monomers are linked for energy storage in animals.

Glycogen (a polysaccharide). Animal energy storage polymer with branched structure.
What covalent bond forms between amino acids in a polypeptide?

Peptide bond. Links amino and carboxyl groups of adjacent amino acids.
Choose the word that completes the statement: Hydrolysis is the ______ of dehydration synthesis.

Reverse. Opposite processes that build and break polymers.
What is the polymer called when nucleotides are linked into a chain?

Polynucleotide (nucleic acid strand). Chain of nucleotides forming DNA or RNA.
Which bond is broken when DNA is hydrolyzed into nucleotides along the backbone?

Phosphodiester bond. Breaks the sugar-phosphate backbone connections.
Which statement best describes what happens to electrons when covalent bonds form in polymers?

Atoms share electrons to create stable covalent bonds. Electron sharing creates stable molecular bonds.
What molecule is consumed when a covalent bond in a polymer is broken by hydrolysis?

Water ( $H_2O$ ). Water splits to provide $H$ and $OH$ to break the bond.
Which bond is broken when a polypeptide is digested into amino acids?

Peptide bond. Hydrolysis breaks the bonds linking amino acids.
Which parts of nucleotides are covalently linked to form a nucleic acid strand?

Phosphate of one nucleotide to sugar of the next. Creates the continuous sugar-phosphate backbone chain.
Identify the correct reactants and products: polymer link + $H_2O$ → ?

Two smaller molecules (monomers) are produced. Hydrolysis breaks polymer bonds using water.
What is the name of the reaction that breaks a polymer into monomers by adding water?

Hydrolysis. Adds $H_2O$ to break bonds between monomers.
Which part of an amino acid varies and gives proteins different chemical properties?

The side chain (R group). Determines protein function and chemical properties.
What is a polymer in the context of biological macromolecules?

A large molecule made of many covalently linked monomers. Formed when many monomers link via covalent bonds.
Which bond is broken when a polysaccharide is digested into monosaccharides?

Glycosidic bond. Hydrolysis breaks sugar linkages in carbohydrates.
Which directionality describes a nucleic acid strand based on its sugar-phosphate backbone?

$5'$ to $3'$ directionality. Direction based on carbon numbering in sugar ring.
Which element is always present in nucleic acids in addition to C, H, O, and N?

Phosphorus (P). Required for phosphate groups in nucleotide structure.
Identify the correct reactants and products: monomer + monomer → polymer link + ?

Water ( $H_2O$ ) is produced. Dehydration synthesis removes water during polymer formation.
What are the four major biological macromolecule classes?

Carbohydrates, lipids, proteins, nucleic acids. The main polymer categories in living organisms.
What is a monomer in the context of biological macromolecules?

A small subunit that can covalently bond to form a polymer. Basic building blocks that join through covalent bonding.
Which reaction type is commonly used in biosynthesis of polymers from monomers?

Dehydration synthesis. Builds larger molecules from smaller subunits.
What covalent bond forms between two monosaccharides in a carbohydrate polymer?

Glycosidic bond. Forms between sugar carbons via dehydration synthesis.
Which functional groups react to form a peptide bond during dehydration synthesis?

Amino group and carboxyl group. The amino nitrogen bonds to the carboxyl carbon.
Find the correct term: Breaking starch into glucose units during digestion is what process?

Hydrolysis. Breaks glycosidic bonds to release glucose units.
What are the three components of a nucleotide?

Phosphate group, 5-carbon sugar, nitrogenous base. The basic structural units of DNA and RNA.
Which macromolecule class is built from amino acid monomers?

Proteins (polypeptides). Amino acids join via peptide bonds to form chains.
Identify the polymer formed when many glucose monomers are linked by glycosidic bonds in plants.

Starch (a polysaccharide). Plant energy storage polymer made from glucose.
Which parts of an amino acid remain after peptide bond formation to form the polypeptide backbone?

The repeating $N$ – $C$ backbone (amino and carboxyl groups). Forms the repeating structural framework of proteins.
Which macromolecule class is built from nucleotide monomers?

Nucleic acids (DNA and RNA). Nucleotides link through phosphodiester bonds.
Identify the correct statement about bonds in macromolecules: covalent or ionic?

Monomers in polymers are primarily linked by covalent bonds. Covalent bonds provide stability to polymer structure.

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