Biology4

29 cards·by ahobbs

Study this deck

1st disadvantage to C4 and CAM plants

takes more energy than C3 pathway

Biological material derived from living or recently living organisms

Biomass

In stomata why does CO2 level drop and O2 level rise?

Photosynthesis

3 stages to Calvin Cycle

carbon fixation, reduction of carbon, regeneration of carbon acceptor needed in first stage

Pore like structures

Stomata

When stomata open what happens?

gas exchange with atmosphere and CO2 comes in and O2 out

When water is brought up from roots and evaporated from leaves?

transpiration

Open and close entrance on stomata

guard cells

Energy source for the calvin cycle

C3 pathway

2nd disadvantage to C4 and CAM plants

chemistry doesn't work well at low temperatures. The first carbon acceptor has to be regenerated.

What is the enzyme in the first step of calvin cycle?

Rubisco

Do C4 and CAM pathways have same light reactions and same calvin cycle as C3 plants?

Yes

Another name for light dependent reactions

Calvin Cycle

C4 and CAM pathways are for what climate?

hot and dry weather

Does photo respiration require plant to spend energy?

yes

What is the advantage of PEP carboxylase over Rubisco and RuBP in the Calvin Cycle?

function better at high temps because rubisco is isolated from oxygen

What are C3 plants?

mostly trees

What is the source of carbon for the calvin cycle?

CO2

What are 2 process in biosphere?

energy flow and chemical cycling

What does "regenerate the carbon acceptor" mean?

It takes energy to re-arrange the molecules

Why is Calvin cycle referred to as C3 pathway?

6 carbon sugar is split into 2 3 carbon sugars

What is an advantage that C4 and CAM plants have over C3 plants in terms of water usage?

They use less water per gram of biomass produced than C3 plants

fixed

to hold in place

Respitory process inplants by which they take up oxygen in light and give out some carbon dioxide

photorespiration

Why not just change rubisco so it will not fixoxygen

its very complicated molecule, very little O2 in atmosphere when photo. began

What is G3P?

used to make starch, sugars, amino and fatty acids

Why does calvin cycle take place during daylight?

that is when light reactions are happening and it needs ATP and electrons to work

When does photo respiration occur?

When the stomata are closed

What is the carbon acceptor molecule?

RuBP