For each reaction identify the energy source the electron do

For each reaction, identify the energy source, the electron donor, the carbon source, and thus determine what kind of a life form would utilize this reaction. Mark the correct with a circle and fill in the empty fields. (i) In the reaction CH_4 + H_2SO_4 rightarrow H_2CO_3 + H_2S, the energy comes from: (sunlight/molecules), so the elevant prefix is (photo/chemo) the electron donor is:___which is (organic/inorganic), so (organo/litho), and the carbon source is:___which is (organic/inorganic), so (hetero/auto), and so it is a:___troph. (ii) In the reaction CO_2 + 4H_2 rightarrow CH_4 + 2H_2O, the energy comes from: (sunlight/molecules), so the elevant prefix is (photo/chemo) the electron donor is: ___which is (organic/inorganic), so (organo/litho). and the carbon source is: ___which is (organic/inorganic), so (hetero/auto), and so it is a: ___troph. (iii) In the reaction CO_2 + H_2O + energy rightarrow CH_2O + O_2. the energy conies from: (sunlight/molecules), so the elevant prefix is (photo/chemo) the electron donor is:___which is (organic/inorganic), so (organo/litho). and the carbon source is:___, which is (organic/inorganic), so (hetero/auto), and so it is a: ___ troph. (iv) In the reaction CH_2 O + O_2 rightarrow CO_2 + H_2O the energy comes from: (sunlight/molecules), so the elevant prefix is (photo/chemo) the electron donor is: ___which is (organic/inorganic), so (organo/litho), and the carbon source is: ___ which is (organic/inorganic), so (hetero/auto). and so it is a:___troph.

Solution

i. The energy comes from molecules, so the prefix is chemo

The electron donor is sulfur, which is inorganic, so litho

The carbon source is methane, which is organic, so hetero

So it is chemolithoheterotroph.

ii. The energy comes from sunlight, so the relevant prefix is photo

The electron donor is hydrogen, which is inorganic, so organic

The carbon source is carbon dioxide, which is inorganic, auto

so it is called photoorganoautotroph.

iii. The energy comes from sunlight, so the relevant prefix is photo

The electron donor is water, which is inorganic, so litho

The carbon source is carbon dioxide, which is inorganic, auto

so it is called photolithoautotroph.

iv. The energy comes from molecule, so the relevant prefix is chemo

The electron donor is oxygen, which is organic, so organic

The carbon source is carbohydrate, which is organic, hetero

so it is called chemoorganoheterotroph.