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Chapter 4 Homework Questions

Chapter 4 Homework Questions. Question 1. Autotrophs – make their own food- cactus Heterotrophs – consume their food - you. Question 2. ATP is the fuel for our cells. Adenosine triphosphate Adenine Ribose 3 phosphates The energy is in the bonds. Question 3.

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Chapter 4 Homework Questions

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  1. Chapter 4 Homework Questions

  2. Question 1 • Autotrophs – make their own food- cactus • Heterotrophs – consume their food - you

  3. Question 2 • ATP is the fuel for our cells. • Adenosine triphosphate • Adenine • Ribose • 3 phosphates • The energy is in the bonds.

  4. Question 3 • ATP ADP + P + Energy • Energy is the result.

  5. Question 4 ATP has one more phosphate than ADP. ATP has more energy because it has more bonds and energy is in the bonds.

  6. Question 5 • Hydrolysis is when a water molecule breaks a bond. For example, making a polysaccharide a monosaccharides. • Dehydration synthesis is when a water molecule is removed and combines molecules together.

  7. Question 6 • Photosynthesis is turning light energy into chemical energy (glucose) with the use of chloroplast.

  8. Question 7 • 6 CO2 + 6 H2O + Light C6H12O6 + 6 O2

  9. Question 8 • The scientist that discovered the exact process of photosynthesis in 1950. He earned a nobel prize for his research. He used radioactive isotopes in Carbon and Oxygen to discover the process.

  10. Question 9 • Chlorophyll is a green pigment found in chloroplast that is the primary catalyst of photosynthesis. Chlorophyll is a molecule that absorbs light energy and the chlorophyll molecule loses electrons. • Chlorophyll “a” molecule is responsible for converting most of the energy to chemical energy.

  11. Question 10 • Between 500 to 600 nm . • Reflect green light.

  12. Question 11 • Light reaction- takes place on the thylakoid membrane. Input is H2O and Light. The output is NADPH and ATP. O2 is released as waste. • Calvin Cycle – Takes place in the Stroma, input is NADH and ATP from the light reaction. Need CO2 from the atmosphere and output is 2 PGAL molecules (sugar). ADP +P and NADP is released back for the light rxn.

  13. Question 12 • PGAL is phosphoglyceraldehyde is a 3 carbon molecule (sugar) that is produced in the calvin cycle. 2 of these make a glucose molecule. • RuBP is Ribulose Bisphosphate and it is the compound that is found in the calvin cycle. It is found at the beginning and end of the calvin cycle.

  14. Question 13 • Correct temperature • Right wavelengths and intensity of light • Sufficient CO2 • Enough H2O

  15. Question 14 • C3 Pathway the normal pathway and called this because a 3 carbon molecule is produced (PGAL) • C4 Pathway is the pathway of plants that open their stomata partially during the day. They make a 4 carbon molecule instead of the 3 carbon molecule. Ex. corn or crabgrass • CAM – Open their stomata at night and close during the day. Ex. Pineapples and Cactus

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