Chapter 5.6-Respiration Flashcards Preview

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Flashcards in Chapter 5.6-Respiration Deck (9)
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1
Q

What is photosynthesis?

A

physiological process used by plants, algae and some types of bacteria to convert light energy from sunlight into chemical energy

2
Q

What is autotrophic nutrition?

A

organisms which use chemical energy to synthesise large organic molecules, which form the building blocks of living cells, from simple inorganic molecules such as water and carbon dioxide

3
Q

What are organisms that photosynthesise called?

A
  • photoautotrophs

- they use light as the energy source for autotrophic nutrition

4
Q

What is the general equation for photosynthesis?

A
  • carbon dioxide + water + energy from plants==glucose +oxygen
  • 6C02+6H20 ===C6H12O6+6O2
5
Q

What is respiration?

A

oxidation of stored organic molecules to release chemical energy

6
Q

Where can the stored organic molecules needed in respiration come from?

A
  • photosynthesis

- digestion of complex organic molecules

7
Q

What are heterotrophs?

A

an organism deriving its nutritional requirements from complex organic substances

8
Q

What is the general chemical formula for respiration?

A

C6H12O6 + 6O2===6H2O + 6CO2 +(energy)

9
Q

What type of reactions are photosynthesis and respiration (endothermic or exothermic) and are they oxidation or reduction reactions?

A
  • photosynthesis is an endothermic process, needs energy. Fixation of carbon needs electrons, and the addition of electrons is a reduction reaction
  • respiration is an exothermic process as it releases chemical energy so it can drive the organisms metabolism. Glucose and other organic compounds are oxidised to produce carbon dioxide and water