[lecture 1] Molecules of life (carbohydrates) Flashcards

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1
Q

important elements in living things

A

N, C, H, O

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2
Q

what elements is in all organic compounds

A

carbon

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3
Q

polymers subunit

A

monomer

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4
Q

sugars (polysaccharides) subunit

A

starches, cellulose, carbohydrates

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5
Q

nucleic acid subunit

A

nucleotide

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6
Q

protein subunit

A

amino acid

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7
Q

glucose formula

A

C6H12O6

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8
Q

photosynthesis equation

A

C2O + H2O = C6H12O6 + O2

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9
Q

monosaccharides examples

A

glucose, fructose, galactose

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10
Q

disaccharides examples

A

sucrose, maltose, lactose

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11
Q

polysaccharides examples

A

cellulose, starch

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12
Q

how is a glycosidic bond formed?

A

formed by a condensation reaction, releases water, anabolic because it requires energy

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13
Q

how do you break a glycosidic bond?

A

hydrolysis, consumes water, catabolic reaction (releases energy) [in digestion, enzymes catalyze the reaction]

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14
Q

lactose breaks down to?

A

glucose and galactose

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15
Q

maltose breaks down to?

A

glucose and glucose

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16
Q

sucrose breaks down to?

A

fructose and glucose

17
Q

branched starch

A

amylopectin (quick to break down)

18
Q

unbranched starch

A

amylose (slow to break down)

19
Q

plants store carbohydrates as?

A

starch

20
Q

anabolic reactions features

A

requires energy

21
Q

catabolic reactions features

A

releases energy

22
Q

animals store carbohydrates as what and where?

A

glycogen and in the liver

23
Q

carbohydrate functions

A
  1. energy store
  2. structural roles
  3. used to manufacture other molecules
24
Q

how does insulin work?

A
  1. blood glucose concentration increases
  2. beta cells in pancreas detect glucose concentration
  3. insulin released into blood
  4. this alters membrane of liver, muscle and fat cells to allow glucose to enter
  5. blood glucose concentration decreases

glucose —–> (glycogenesis) ——> glycogen
glucose ——> (lipogenesis) ——>triglycerides

insulin inhibits glucose production

25
Q

how does glucagon work?

A
  1. blood glucose concentration decreases
  2. alpha cells in pancreas detect low insulin levels
  3. glucagon released into blood
  4. binds to glucagon receptors on liver cell membranes
    glycogen —–> (gluconeogenesis) ——> glucose
    [hydrolysis reaction]
  5. blood glucose concentration increases

insulin inhibits glucose production

26
Q

describe type 1 diabetes

A
  1. no insulin produced
  2. less common
  3. usually due to genetics
  4. can be treated by insulin injections
27
Q

describe type 2 diabetes

A
  1. Insulin is not detected (insulin resistance)
  2. More common
  3. Usually due to lifestyle and age
  4. Not treated with insulin injections