Organic Chemistry: Carbohydrates and Lipids

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Questions and Answers

What are proteins primarily composed of?

  • Carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur (correct)
  • Carbon, nitrogen, oxygen, phosphorus, and sulfur
  • Nitrogen, carbon, hydrogen, calcium, and oxygen
  • Hydrogen, nitrogen, oxygen, magnesium, and carbon

What determines the identity of an amino acid?

  • The carboxyl group
  • The amino group
  • The peptide bond
  • The side group (correct)

Which of the following is NOT a function of proteins?

  • Transport
  • Movement
  • Biochemical control
  • Energy storage (correct)

What type of bond is formed between amino acids?

<p>Peptide bond (B)</p> Signup and view all the answers

What process involves building larger molecules by removing water?

<p>Dehydration synthesis (A)</p> Signup and view all the answers

Which protein is primarily involved in muscle movement?

<p>Actin (C)</p> Signup and view all the answers

What is the basic unit that makes up proteins?

<p>Amino acids (C)</p> Signup and view all the answers

Which nucleic acid is associated with protein synthesis?

<p>mRNA (A)</p> Signup and view all the answers

What type of molecule are enzymes classified as?

<p>Proteins (C)</p> Signup and view all the answers

How many amino acids are universally used by organisms to form proteins?

<p>20 (D)</p> Signup and view all the answers

What is a characteristic feature of carbohydrates?

<p>They have a 1:2:1 ratio of carbon, hydrogen, and oxygen. (A)</p> Signup and view all the answers

What type of carbohydrate is formed by two covalently bonded monosaccharides?

<p>Disaccharide (B)</p> Signup and view all the answers

Which statement about lipids is true?

<p>Lipids include fats, oils, waxes, and steroids. (C)</p> Signup and view all the answers

What is a primary function of fats in living organisms?

<p>To store energy and provide insulation. (D)</p> Signup and view all the answers

What distinguishes saturated fats from unsaturated fats?

<p>Saturated fats are saturated with hydrogen. (B)</p> Signup and view all the answers

What are phospholipids primarily associated with in living organisms?

<p>Cell membrane structure (B)</p> Signup and view all the answers

Which carbohydrate is classified as a polysaccharide?

<p>Cellulose (B)</p> Signup and view all the answers

Which of the following statements about steroids is true?

<p>They have a structure composed of four linked rings. (A)</p> Signup and view all the answers

What role do simple sugars, known as monosaccharides, play in living organisms?

<p>Act as a source of immediate energy. (A)</p> Signup and view all the answers

Which organic compound serves as a type of structural support in plants?

<p>Cellulose (D)</p> Signup and view all the answers

What is the primary role of hemoglobin in the body?

<p>Transporting oxygen and carbon dioxide (C)</p> Signup and view all the answers

Which protein is primarily involved in structural functions within connective tissue?

<p>Collagen (C)</p> Signup and view all the answers

What type of bond links amino acids together in a protein?

<p>Peptide bond (B)</p> Signup and view all the answers

Which of the following processes involves breaking down molecules by adding water?

<p>Hydrolysis (A)</p> Signup and view all the answers

What distinguishes the 20 different amino acids used by organisms?

<p>Their side groups (B)</p> Signup and view all the answers

What is a common characteristic of polymers formed from monomers?

<p>They consist of covalent bonds (B)</p> Signup and view all the answers

Which function of proteins is essential for muscle contraction?

<p>Movement (D)</p> Signup and view all the answers

Which type of nucleic acid is primarily involved in the direct synthesis of proteins?

<p>mRNA (D)</p> Signup and view all the answers

What is the primary role of enzymes in biochemical reactions?

<p>Speed up chemical reactions (D)</p> Signup and view all the answers

How many covalent bonds can a carbon atom form due to its electron configuration?

<p>4 (B)</p> Signup and view all the answers

What is the primary reason carbon is prevalent in organic compounds?

<p>Carbon can form multiple types of bonds with itself. (A)</p> Signup and view all the answers

Which statement accurately describes monosaccharides?

<p>They are the simplest form of carbohydrates. (C)</p> Signup and view all the answers

What distinguishes saturated fats from unsaturated fats?

<p>Saturated fats have a higher melting point. (B)</p> Signup and view all the answers

Which of the following best describes polysaccharides?

<p>Giant polymers consisting of linked monosaccharides. (A)</p> Signup and view all the answers

Which function is NOT associated with the role of lipids in living organisms?

<p>Enzyme activity (D)</p> Signup and view all the answers

Which type of carbohydrate serves as an energy source for organisms?

<p>Starch (A)</p> Signup and view all the answers

What is the role of phospholipids in biological systems?

<p>They form the structure of cell membranes. (C)</p> Signup and view all the answers

Which of the following describes the structure of steroids?

<p>Four linked rings of carbon atoms. (A)</p> Signup and view all the answers

What type of molecule are fats mainly composed of?

<p>Glycerol and three fatty acids. (B)</p> Signup and view all the answers

Which of the following is NOT a characteristic of carbohydrates?

<p>They are the primary structural components of fatty acids. (D)</p> Signup and view all the answers

Flashcards

Proteins

Organic molecules made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. They are essential for life and form structures like muscles, hair, and skin.

Amino Acids

The building blocks of proteins. Each has an amino group (-NH2), a carboxyl group (-COOH), and a unique side group.

Peptide Bond

The covalent bond that connects amino acids together in a protein chain.

Protein Functions

Proteins have many jobs in the body, like movement (actin/myosin), structure (collagen), chemical reactions (enzymes), carrying things (hemoglobin), storing things (casein), controlling things (hormones), and defense (antibodies).

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Monomers

Small molecules that can combine to form larger molecules (polymers).

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Polymers

Large molecules made of repeating monomer units bonded together.

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Dehydration Synthesis

The process of linking monomers by removing water molecules.

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Hydrolysis

The process of breaking polymers apart by adding water molecules.

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Nucleic Acids

Large molecules (DNA and RNA), composed of Carbon, Hydrogen, Oxygen, Nitrogen, and Phosphorus, that carry genetic information.

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Carbon's Bonding

Carbon atoms can form up to four covalent bonds, allowing for a wide variety of complex molecules.

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Organic Chemistry

The study of carbon-containing compounds.

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Organic Compounds

Compounds containing carbon.

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Carbohydrates

Organic compounds with C, H, and O atoms in a 1:2:1 ratio. Used for energy and structure.

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Monosaccharides

Simple sugars, simplest carbohydrates.

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Disaccharides

Two monosaccharides bonded together.

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Polysaccharides

Many monosaccharides linked together.

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Lipids

Organic compounds including fats, oils, waxes, and steroids. Primarily C, H, and O.

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Fatty Acids

Chains of carbon atoms with an acid group at one end.

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Saturated Fats

Fats with many hydrogen atoms, solid at room temperature.

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Unsaturated Fats

Fats with fewer hydrogen atoms, liquid at room temperature.

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Phospholipids

Lipids with phosphate groups, key part of cell membranes.

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Steroids

Lipids with four interconnected carbon rings.

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Waxes

Lipids composed of fatty acids and alcohols, for waterproofing and protection.

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Protein Building Blocks

Amino acids are the fundamental units of proteins.

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Amino Acids

Organic molecules with an amino group (-NH2) and a carboxyl group (-COOH).

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Peptide Bonds

Covalent bonds that link amino acids together in a chain.

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Protein Functions

Proteins perform various roles, including movement, structure, biochemical reactions, transport, and storage.

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Carbon's Bonding

Carbon atoms form up to four covalent bonds.

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Dehydration Synthesis

Building molecules by removing water.

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Hydrolysis

Breaking molecules by adding water.

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Monomers

Small molecules that combine to form larger polymers.

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Polymers

Large molecules made of repeating monomer units.

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Nucleic Acids

Large organic molecules (DNA & RNA), carrying the genetic instructions.

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Organic Chemistry

The study of carbon-containing compounds.

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Organic Compounds

Compounds that contain carbon.

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Carbohydrates

Organic compounds with C, H, and O atoms in a 1:2:1 ratio. Used for energy and structure.

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Monosaccharides

Simple sugars, the simplest carbohydrates.

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Disaccharides

Two monosaccharides bonded together.

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Polysaccharides

Many monosaccharides linked together.

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Lipids

Organic compounds including fats, oils, waxes, and steroids. Primarily C, H, and O.

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Fatty Acids

Chains of carbon atoms with an acid group at one end.

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Saturated Fats

Fats with many hydrogen atoms, solid at room temperature.

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Unsaturated Fats

Fats with fewer hydrogen atoms, liquid at room temperature.

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Phospholipids

Lipids with phosphate groups, key part of cell membranes.

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Steroids

Lipids with four interconnected carbon rings.

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Waxes

Lipids composed of fatty acids and alcohols, for waterproofing and protection.

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Study Notes

Organic Chemistry

  • Organic chemistry studies organic compounds.
  • All organic compounds contain carbon.
  • Many organic compounds originate from living things.
  • Most naturally occurring compounds are organic.

Carbohydrates

  • Carbohydrates are composed of carbon, hydrogen, and oxygen in a 1:2:1 ratio.
  • Sugars and starches are carbohydrates.
  • Living things use carbohydrates for energy and structural support.
  • Monosaccharides: Simple sugars, include glucose and fructose.
  • Disaccharides: Two monosaccharides bonded together, examples include sucrose (glucose + fructose), lactose (glucose + galactose), and maltose (glucose + glucose).
  • Polysaccharides: Made of thousands of monosaccharides linked together. Examples include starch (found in wheat, rice, corn, and potatoes), glycogen (storage form in animals), and cellulose (plant structural component).

Lipids

  • Lipids are organic compounds (including fats, oils, waxes, and steroids) consisting primarily of carbon, hydrogen, and oxygen.
  • Lipids have a similar ratio of these elements to carbohydrates, but differ in the specifics.
  • Fats: Composed of glycerol and 3 fatty acids. Used for energy storage and insulation. Excess carbohydrates are converted to fats.
  • Fatty acids are chains of carbon atoms ending in an acid group. The structure of the fatty acids determines the characteristics of the fat. Animals typically contain approximately 30 different fatty acids.

Other Organic Compounds

  • Phospholipids: Lipids containing phosphorus. Major components of cell membranes.
  • Steroids: Lipids with four linked carbon rings. Examples include cholesterol and hormones.
  • Waxes: Organic compounds made from fatty acids and alcohols.
  • Proteins: Organic compounds made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. Crucial for all living things, including muscles, hair, and skin. Made from amino acids.
  • Amino Acids: Building blocks of proteins. About 20 different amino acids are used to create different proteins. Amino acids contain an amino group (-NH₂), a carboxyl group (-COOH), and a unique side group.
  • Covalent bonds connect amino acids together into polypeptide chains, forming proteins.
  • Nucleic Acids: Large, complex molecules made of carbon, hydrogen, oxygen, nitrogen, and phosphorus. Examples include DNA and RNA, involved in genetic material.

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