BSC2011L Photosynthesis Quiz

1st step of photosynthesis

plants capture light energy

2nd step of photosynthesis

Combine carbons from CO2 into carbs

3rd step of photosynthesis

Incidentally release O2

reactants for photosynthesis equation

CO2, H20, light

products for photosynthesis equation

C6H12O6, O2, H2O

cellular respiration

reverse process for...

epidermis contains...

stomata

what structure facilitates photosynthesis?

leaves

spongy mesophyll

used for gas exchange

pallisade mesophyll

contains chloroplasts

chlorophyll

pigment within chloroplasts that the plant uses to produce its own energy though photosynthesis

how many membranes do chloroplasts have?

2

lamellae

internal membranes of chloroplasts that are arranged in layers

thylakoids

fused lamellae that form disk-like sacs

grana

columns of thylakoids

stroma

cytoplasm surrounding the grana

where do light-dependent reactions occur?

thylakoids

where do light-independent reactions occur?

thylakoid

phosphorylation

generates ATP by adding phosphate to ADP

what is produced in thylakoids?

NADH, ATP, and release of O2

what is produced in stroma?

carbohydrates

blank

phosphate buffer, distilled water, and chloroplast

used to calibrate the spectrophotometer

experimental and control solution

phosphate buffer, distilled water, chloroplast, and DCPIP

absorbance equation

A = 2-log10 %T

DCIP

artificial electron acceptor that takes the place of NADP+ molecule in light-dependent reactions of photosynthesis

Photosynthesis

chemical process by which light energy is used to convert Co2 and H20 to C6H12O6+O2+H2O

Chloroplast

organelles that contain the pigment chlorophyll

light reaction

Part of photosynthesis that involves light. ATP and NADPH are produced. Takes place on the thylakoid membrane.

Calvin Cycle

light-independent reactions of photosynthesis in which energy from ATP and NADPH is used to build high-energy compounds such as sugar

steps of light reaction

Solar energy to chemical energy

1)light absorbed by chlorophyll

2)energy helps split H2O

3) electron produced from splitting H2O binds to electron acceptor, NADP+

products of Light reaction step

ATP, NADPH, O2

Calvin Cycle steps

CO2 to organic carbon

1)CO2 absorbed from air

2)NADPH gives up electron ATP provides energy

products of Calvin cycle

Sugar, NADP+, ADP+P

wavelength=

color

amplitude=

intensity

Why are chloroplasts green?

they reflect green light

visible light can be

absorbed, reflected, transmitted

chlorophyll pigments absorb

red and blue light

chlorophyll pigments reflect

green light

natural reaction vs artificial reaction

NADP+-->NADPH

oxidized DCPIP-->reduced DCPIP(blue to colorless)

sprectrophotometer

measures the rate of decrease in oxidized DCPIP(measuring absorbance)

absorbance

amount of light(of a specified wavelength) absorbed by a solution)

how to calculate the rate of photosynthesis

slope of absorbance over time

as intensity increases, the rate of photosynthesis

increases

red and blue light will

increase the rate of photosynthesis

experimental

exposed to light and rate of photosynthesis is measured

control

same as experimental, except never exposed to light(covered in aluminum foil)

wavelength range

595-605 nm(wavelength that is absorbed most by the DCPIP)

reaction rate equation

|Δ[A]/Δt/16|

subtract the control rate from the experimental rate to account of external factors