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Structure of Organic Molecules (Grades 11-12)

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Structure of Organic Molecules

Which organic molecule is represented by the structural formula below?
Structural Formula - Carbon Ring Glucose
  1. fatty acid
  2. glucose
  3. DNA
  4. tertiary protein
Which organic molecule is represented by the structural formula below?
Structural Formula - Carbon Chain Glucose
  1. sucrose
  2. fatty acid
  3. glucose
  4. starch
The Hierarchy of Protein Structure
Protein Structure With Text Labels
Which structure of a protein consists of a linear sequence of amino acids?
  1. primary
  2. secondary
  3. tertiary
  4. quarternary
Which protein structure gives the protein its actual function?
  1. primary
  2. secondary
  3. tertiary
  4. quarternary
Which of these describes the quarternary protein structure?
  1. coiled regions folded into a 3-D shape
  2. two or more polypeptides bound to each other
  3. a linear sequence of amino acids
  4. sequences of amino acids bonded with hydrogen bonds
How does the tertiary structure of a protein differ from the secondary structure?
  1. The tertiary structure has a 3D shape, while the secondary structure is often folded or pleated.
  2. The tertiary structure is made of two or more polypeptides, while the secondary structure is made form only one polypeptide.
  3. The tertiary structure is pleated into an alpha helix, while the secondary structure is completely linear.
  4. The tertiary structure is a sequence of amino acids, while the secondary structure contains several polypeptides.
Fatty acids are long chains of carbon atoms that can be either saturated or unsaturated. When a fatty acid is considered saturated, each of the carbon atoms has no additional space for                        to attach.
What property makes phospholipids the ideal organic molecule to make up the cell membrane?
  1. Phospholipids dissolve easily in water, so materials can pass through them without the need for energy.
  2. Phospholipids contain many mitochondria, so the cell membrane has all the energy it needs to undergo mitosis.
  3. Phospholipids maintain their shape all the time, so organisms made from these cells can grow very large.
  4. Phospholipids have hydrophobic and hydrophilic ends, so cells can live in an aqueous environment and still carry out all their functions.
Organic molecules, such as glucose, fructose, and galactose all have the same chemical formulas but express different structures. Molecules of this type are called                     .
How does the structure of a steroid differ from that of other lipids?

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