Organic Molecules Overview
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Questions and Answers

How are organic molecules related to all living things?

Organic molecules are the molecules which exist in all living things. They are life's building blocks.

Name four categories of organic molecules which form the basis of all living things.

Carbohydrates, lipids, proteins, and nucleic acids.

All of the organic molecules are based on which element?

Carbon.

Many times, the molecules join to form long chains with what kind of backbone?

<p>They join together to form large molecules.</p> Signup and view all the answers

How are the building blocks of organic molecules like bricks?

<p>Each type of organic molecule is built from a single type of building block.</p> Signup and view all the answers

What is the building block of each of the four classes of organic molecules?

<p>Nucleotides (A), Fatty acids (B), Amino acids (C), Sugar (D)</p> Signup and view all the answers

What is a polymer?

<p>A polymer is a more complex molecule created by forming monomers together.</p> Signup and view all the answers

What determines how organic molecules will look and behave?

<p>Their form determines their function.</p> Signup and view all the answers

What are the four common characteristics of all organic molecules?

<p>Their form determines their function. (A), They are formed from just a few elements. (B), Each type is built from a single type of building block. (C), They are all carbon based. (D)</p> Signup and view all the answers

What are the elements contained in carbohydrates?

<p>Carbon, hydrogen, and oxygen.</p> Signup and view all the answers

What is the building block of carbohydrates?

<p>A single sugar called a monosaccharide.</p> Signup and view all the answers

What is a monosaccharide?

<p>The building block of carbohydrates that consists of carbon rings.</p> Signup and view all the answers

What does a monosaccharide look like?

<p>Sugars consist of carbon rings.</p> Signup and view all the answers

What is a disaccharide?

<p>When two monosaccharides combine, they form a disaccharide.</p> Signup and view all the answers

How does a polysaccharide differ from a disaccharide?

<p>When more than two monosaccharides join together, a polysaccharide is formed.</p> Signup and view all the answers

What are the three classes of carbohydrates?

<p>Starch (B), Glycogen (C), Cellulose (D)</p> Signup and view all the answers

Which involves food storage in plants?

<p>Starch.</p> Signup and view all the answers

Which involves food storage in animals?

<p>Glycogen.</p> Signup and view all the answers

What is cellulose used for?

<p>Cellulose is used for structural support in plants.</p> Signup and view all the answers

Why would an athlete have a big pasta dinner the night before a race?

<p>Potatoes, pasta, and rice are rich in starch, providing a quick form of energy.</p> Signup and view all the answers

What is the building block of lipids?

<p>Fatty acids.</p> Signup and view all the answers

Name examples of lipids.

<p>Saturated fat (A), Unsaturated fat (D)</p> Signup and view all the answers

Describe the structure of a fatty acid.

<p>A fatty acid consists of a long hydrocarbon chain with a carboxyl group at one end.</p> Signup and view all the answers

What is a saturated fatty acid?

<p>Saturated fats have two carbons attached to each carbon except the one at the end.</p> Signup and view all the answers

What are some of the functions of proteins?

<p>Proteins form muscles and transport O2 (hemoglobin).</p> Signup and view all the answers

What is the building block of proteins?

<p>Amino acids.</p> Signup and view all the answers

What is the name of the bond that joins amino acids?

<p>Peptide bond.</p> Signup and view all the answers

How many different amino acids are there?

<p>Around 20.</p> Signup and view all the answers

What part of the amino acid varies from one amino acid to another?

<p>The 'R' group.</p> Signup and view all the answers

What determines the shape and function of a protein?

<p>The sequence and shapes of the 'R' groups.</p> Signup and view all the answers

What are the two types of nucleic acids?

<p>DNA (A), RNA (B)</p> Signup and view all the answers

What is the role of DNA?

<p>DNA contains instructions on how to make proteins in the body.</p> Signup and view all the answers

How does the role of RNA differ from that of DNA?

<p>RNA is a copy of DNA and carries instructions for protein synthesis.</p> Signup and view all the answers

What is the building block of nucleic acids?

<p>Nucleotide.</p> Signup and view all the answers

What are the three parts of this monomer?

<p>Five-carbon sugar (A), Phosphate group (B), Nitrogen base (D)</p> Signup and view all the answers

Describe the structure and shape of DNA.

<p>The structure of DNA resembles that of a twisted ladder known as a double helix.</p> Signup and view all the answers

What are the rails of the ladder made of?

<p>Alternating sugars and phosphates.</p> Signup and view all the answers

What are the four different DNA bases?

<p>Adenine (A), Guanine (B), Thymine (C), Cytosine (D)</p> Signup and view all the answers

What part of the ladder do these bases form?

<p>The bases bond to form rungs.</p> Signup and view all the answers

Cytosine always pairs with what base?

<p>Guanine.</p> Signup and view all the answers

List four differences between DNA and RNA.

<p>DNA cannot leave the nucleus, RNA can. (A), DNA is a double helix, RNA is single-stranded. (B), DNA has deoxyribose sugar, RNA has ribose sugar. (C), DNA contains thymine, RNA contains uracil. (D)</p> Signup and view all the answers

List three similarities between DNA and RNA.

<p>Both are formed from nucleotides. (B), Both have sugar phosphate backbones. (C), Both serve to transfer genetic code. (D)</p> Signup and view all the answers

What are the six most common elements of life?

<p>Carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur.</p> Signup and view all the answers

Study Notes

Organic Molecules Overview

  • Essential for life, organic molecules are the building blocks found in all living organisms.
  • All organic molecules are carbon-based, commonly consisting of carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur.

Categories of Organic Molecules

  • Four main types:
    • Carbohydrates
    • Lipids
    • Proteins
    • Nucleic acids

Characteristics of Organic Molecules

  • Formed from a limited set of elements, allowing for the creation of large, complex structures (polymers).
  • Each category is composed of a fundamental building block:
    • Carbohydrates: monosaccharide (sugar)
    • Lipids: fatty acids
    • Proteins: amino acids
    • Nucleic acids: nucleotides
  • The structure of these molecules dictates their function, influencing behaviors and reactions.

Carbohydrates

  • Composed of carbon, hydrogen, and oxygen; primary building block is monosaccharide.
  • Types include:
    • Monosaccharides: Single sugar units with carbon rings.
    • Disaccharides: Formed when two monosaccharides bond.
    • Polysaccharides: Comprised of multiple monosaccharides.
  • Functions:
    • Starch: Energy storage in plants.
    • Glycogen: Energy storage in animals.
    • Cellulose: Structural support in plant cell walls.

Lipids

  • Include fats and oils, serving as significant energy reserves.
  • Building block is the fatty acid, which can be saturated (with carbon atoms fully bonded) or unsaturated (with double bonds).

Proteins

  • Composed of amino acids; around 20 different types exist.
  • Formed through peptide bonds between amino acids, linking them into polypeptides.
  • Functions include muscle formation, transportation of oxygen (hemoglobin), and acting as enzymes.

Nucleic Acids

  • Two types: DNA and RNA.
  • DNA: Contains genetic blueprints for protein synthesis, structured as a double helix with a sugar-phosphate backbone and four bases (adenine, thymine, cytosine, guanine).
  • RNA: Functions primarily as a messenger, transferring genetic information from DNA to the cytoplasm for protein synthesis; ribose sugar and uracil base replace thymine.

Fundamental Molecular Structure

  • A nucleotide, the building block of nucleic acids, features:
    • A five-carbon sugar
    • A phosphate group
    • A nitrogen base

Comparisons Between DNA and RNA

  • Differences:

    • Sugar type (deoxyribose in DNA vs. ribose in RNA)
    • Structure (double helix for DNA vs. single strand for RNA)
    • Bases (thymine in DNA vs. uracil in RNA)
    • Location (DNA remains in the nucleus; RNA can travel into the cytoplasm)

  • Similarities:

    • Both consist of nucleotides.
    • Both have sugar-phosphate backbones.
    • Both play roles in genetic information transfer.

Importance of Organic Molecules

  • Organic molecules are crucial for energy provision, structural integrity, and genetic coding, underlying all biological processes.
  • CHNOPS represents the six most common elements necessary for life, emphasizing the chemical basis of living organisms.

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Description

Explore the essential organic molecules that serve as the building blocks of life. This quiz covers the four main types: carbohydrates, lipids, proteins, and nucleic acids, including their structures and functions. Understand how these molecules are formed and classified based on their elements and characteristics.

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