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Carbohydrates

Carbohydrates. Question of the Day. Question: What are the 4 types of macromolecules that we will be studying? Answer: … … …. 4’s Turn In: Macromolecule Wanted Poster p . 38 A.Q.’s 1ab, 3ab, 5. Frequently Missed Test Questions.

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Carbohydrates

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  1. Carbohydrates

  2. Question of the Day Question: What are the 4 types of macromolecules that we will be studying? Answer: … … … • 4’s Turn In: • Macromolecule Wanted Poster • p. 38 A.Q.’s 1ab, 3ab, 5

  3. Frequently Missed Test Questions The graph which gives no clue about the carrying capacity of the environment is:

  4. Frequently Missed Test Questions If the snake population declines, one result probably will be: • Competition between spiders and salamanders • Decrease in the centipede density • Emigration of the salamanders • Increase in nematode density

  5. Test Corrections • Test corrections • During tutorial • May use anything EXCEPT phone & other people; use test dividers • 1/3 of a point back per question • Grab your scantron and sign out a test • Last day: Thursday, 10/24 • Biospheres! Week 4

  6. Elements of Life • There are more than 25 elements in organic molecules but the most common are: • C • H • N • O • P • S

  7. Carbohydrates • Examples: sugar, starch, cellulose • Uses: • Energy storage • ‘Building’ material • Names end in –ose

  8. Monosaccharides • One sugar molecule: simple carbohydrates • C6H12O6 • Examples: glucose, fructose, galactose, ribose • Cells use these to generate ATP

  9. Disaccharides • Two linked sugars • C12H22O11 (C6H12O6 + C6H12O6 – H2O) • Examples: • Maltose: (glucose + glucose) • Sucrose: (glucose + fructose) • Lactose: (galactose + glucose)

  10. Polysaccharides • 3 or more linked sugars: complex carbohydrates • Examples: • Starch • Glycogen • Cellulose • Chitin

  11. p. 38 A.Q. 1ab, 3ab, 5 1a. Describe the structure of an atom. 1a. An atom is an extremely small particle with a nucleus in the center. The nucleus is formed of smaller particles called protons, which are positively charged, and neutrons, which have no charge. Smaller particles called electrons, which are negatively charged, are in constant motion in the space surrounding the nucleus. 1b. An atom of calcium contains 20 protons. How many electrons does it have? 1b. If an atom of calcium contains 20 protons, then it should also contain 20 electrons so that the atom will have no net charge. 3a. What is a compound? 3a. A compound is a substance formed by the chemical combination of two or more elements in definite proportions, like H2O (water).

  12. p. 38 A.Q. 1ab, 3ab, 5 3b. Water (H2O) and hydrogen peroxide (H2O2) both consists of hydrogen and oxygen atoms. Explain why they have different chemical and physical properties. 3b. The two compounds have different properties because they contain hydrogen and oxygen in different proportions. • Why do you think it is important that biologists have a good understanding of chemistry? 5. It is important that biologists have a good understanding of chemistry because like all matter, living things are made up of elements and chemical compounds. In addition, the survival of living things depends on chemical reactions that take place within and outside their bodies.

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