Organic Chemistry: Carbohydrates and Lipids

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Questions and Answers

What is unique about the structure of carbon that allows it to form a wide variety of organic compounds?

  • It has a strong electronegativity.
  • It can form four covalent bonds with other atoms. (correct)
  • It can only bond with oxygen and nitrogen.
  • It exists primarily as a gas under normal conditions.

Which of the following best describes monosaccharides?

  • They are produced from the breakdown of fats.
  • They are the simplest carbohydrates, also called simple sugars. (correct)
  • They are formed from two covalently bonded simple sugars.
  • They are complex carbohydrates used for structural support.

What distinguishes saturated fats from unsaturated fats?

  • Saturated fats have many hydrogen bonds and are typically solid at room temperature. (correct)
  • Saturated fats are always derived from plant sources.
  • Saturated fats contain fewer hydrogen atoms than unsaturated fats.
  • Saturated fats are liquid at room temperature.

Which of the following is a characteristic function of phospholipids?

<p>They are the major components of cell membranes. (D)</p> Signup and view all the answers

Which of the following statements is true regarding polysaccharides?

<p>They consist of thousands of linked monosaccharides. (B)</p> Signup and view all the answers

Which of the following best defines lipids?

<p>Compounds that include fats, oils, waxes, and steroids. (B)</p> Signup and view all the answers

What role do carbohydrates primarily serve in living organisms?

<p>They are used for structural support in plant cells. (C)</p> Signup and view all the answers

Which of the following statements about steroids is accurate?

<p>They are made of four linked rings of carbon atoms. (B)</p> Signup and view all the answers

What are the building blocks of proteins?

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

Which type of bond holds amino acids together in a protein?

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

What is NOT a function of proteins?

<p>Storage of genetic information (C)</p> Signup and view all the answers

Which of the following is a function of hemoglobin?

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

What is required for the process of dehydration synthesis?

<p>Removal of water (B)</p> Signup and view all the answers

What distinguishes the side group of an amino acid?

<p>It gives the amino acid its unique identity. (D)</p> Signup and view all the answers

Which of the following describes a polymer?

<p>Two or more monomers linked together (C)</p> Signup and view all the answers

What is the primary role of casein in milk?

<p>To store amino acids for young animals (A)</p> Signup and view all the answers

What is the primary function of glycogen in animals?

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

Which type of carbohydrate is formed by the bonding of two monosaccharides?

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

What differentiates saturated fats from unsaturated fats?

<p>Presence of double bonds between carbon atoms (D)</p> Signup and view all the answers

What are phospholipids primarily responsible for in a cell?

<p>Making up the cell membrane (B)</p> Signup and view all the answers

Which of the following best describes polysaccharides?

<p>Large polymers of monosaccharides (D)</p> Signup and view all the answers

Which of the following proteins is primarily involved in biochemical control by speeding up chemical reactions?

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

Which part of an amino acid determines its identity?

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

What is the process called when larger molecules are formed by the removal of water?

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

Which of the following is NOT a function of proteins?

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

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

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

Flashcards

Organic Chemistry

The study of carbon-containing compounds, many originating from living things.

Organic Compounds

Molecules containing carbon.

Carbohydrates

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

Monosaccharides

Simple sugars; the simplest carbohydrates.

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Disaccharides

Two monosaccharides bonded together.

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Polysaccharides

Many monosaccharides linked together, forming large polymers.

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Lipids

Organic compounds including fats, oils, waxes, and steroids; generally 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 Fatty Acids

Fatty acids with many hydrogen atoms, typically solid at room temp.

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Unsaturated Fatty Acids

Fatty acids with fewer hydrogen atoms, typically liquid at room temp.

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Phospholipids

Lipids with phosphorous, key components of cell membranes.

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Steroids

Lipids composed of four linked carbon rings; includes hormones and cholesterol.

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Waxes

Lipids made of fatty acids and alcohols.

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Amino Acid

The building block of proteins; a compound containing an amino group (-NH2), a carboxyl group (-COOH), and a side group that determines its identity.

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Peptide Bond

A covalent bond between the amino group of one amino acid and the carboxyl group of another.

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Protein Function: Movement

Proteins like actin and myosin enable muscle contraction and movement.

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Protein Function: Structure

Collagen provides structural support to tissues, giving them strength and shape.

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Protein Function: Enzymes

Proteins that speed up chemical reactions in the body.

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Protein Function: Transport

Proteins like hemoglobin carry molecules like oxygen and carbon dioxide throughout the body.

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Protein Function: Storage

Proteins like casein store amino acids for growth in young animals.

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Protein Function: Regulation

Hormones, which are proteins, control growth, development, and metabolism.

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Protein Function: Defense

Antibodies, which are proteins, help fight off infections and diseases.

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Nucleic Acid

Large molecules composed of carbon, hydrogen, oxygen, nitrogen, and phosphorus (C, H, O, N, P); the genetic material in living organisms.

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Dehydration Synthesis

The process of building larger molecules by removing water molecules.

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Hydrolysis

The process of breaking down larger molecules by adding water.

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Polymer

A large molecule formed by linking many smaller molecules called monomers together.

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Monomer

A small molecule that serves as a building block for a larger molecule called a polymer.

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Organic Chemistry

The study of carbon-containing compounds, often from living things.

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Carbohydrates

Organic compounds with C, H, and O 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, forming large polymers.

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Lipids

Organic compounds including fats, oils, waxes, and steroids; generally 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 Fatty Acids

Fatty acids with many hydrogen atoms, typically solid at room temp.

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Unsaturated Fatty Acids

Fatty acids with fewer hydrogen atoms, typically liquid at room temp.

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Phospholipids

Lipids with phosphorous, key components of cell membranes.

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Steroids

Lipids composed of four linked carbon rings; includes hormones and cholesterol.

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Waxes

Lipids made of fatty acids and alcohols.

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Protein Building Blocks

Amino acids are the components that combine to form proteins.

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Amino Acid Structure

An amino acid has an amino group (-NH2), a carboxyl group (-COOH), and a unique side chain.

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Peptide Bonds

Peptide bonds are covalent bonds that link amino acids together.

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Protein Functions - Movement

Proteins like actin and myosin are crucial for muscle contraction and movement.

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Protein Functions - Structure

Collagen is a protein that provides essential structural support to tissues.

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Protein Functions - Enzymes

Enzymes are proteins that speed up chemical reactions.

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Protein Functions - Transport

Proteins like hemoglobin transport molecules like oxygen and carbon dioxide.

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Protein Functions - Storage

Casein stores amino acids for use in growing young animals.

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Protein Functions - Regulation

Hormones, which are proteins, control many bodily functions.

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Protein Functions - Defense

Antibodies protect the body against infection.

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Nucleic Acids

Large complex molecules like DNA and RNA that contain genetic information

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Dehydration Synthesis

The creation of larger molecules by removing water

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Hydrolysis

The breakdown of larger molecules by adding water

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Polymer

A large molecule composed of repeating small units (monomers)

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Monomer

A small molecule that forms the building blocks of polymers

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Study Notes

Organic Chemistry

  • Organic chemistry studies organic compounds, which contain carbon.
  • Many organic compounds come from living things.
  • Most naturally occurring compounds are organic.

Carbohydrates (A)

  • 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

  • Simplest carbohydrates, also called simple sugars.
  • Examples include glucose and fructose.

Disaccharides

  • Two monosaccharides bonded together.
  • Examples include sucrose (glucose + fructose), lactose (glucose + galactose), and maltose (glucose + glucose).

Polysaccharides

  • Large polymers of linked monosaccharides.
  • Examples include starch, found in wheat, rice, corn, and potatoes, which plants use to store glucose and animals to store glucose as glycogen.
  • Cellulose is a structural polysaccharide found in plants.
  • chitin

Lipids (B)

  • Lipids include fats, oils, waxes, and steroids.
  • Lipids are generally composed of carbon, hydrogen, and oxygen, similar to carbohydrates, but in different ratios.

Fats

  • Composed of glycerol and three fatty acids.
  • Used for energy storage and insulation.
  • Excess carbohydrates are converted to fats.
  • Fatty acid structure determines fat characteristics.
  • Animals typically contain about 30 fatty acids.

Proteins (C)

  • Proteins are organic compounds containing carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.
  • Essential to all living things (e.g., muscles, hair, skin).

Amino Acids

  • Building blocks of proteins.
  • About 20 different amino acids are used in protein synthesis across species.
  • Amino acids contain an amino group (-NH2), a carboxyl group (-COOH), and a side group (determines amino acid identity).
  • Amino acids are bonded together by peptide bonds.

Protein Functions

  • Proteins have diverse functions including movement (actin and myosin in muscle fibers), structure (collagen), biochemical control (enzymes), transport (hemoglobin), storage (casein in milk), and regulation (hormones).

Nucleic Acids (D)

  • Large, complex molecules composed of carbon, hydrogen, oxygen, nitrogen, and phosphorus.
  • These are considered the genetic material of the cell.
  • Examples of nucleic acids include DNA and RNA.

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