bio principles lab photosynthesis quiz

photosynthesis equation

6CO2 + 6H2O → 6O2 + C6H12O6

pigments

chlorophyll a: absorbs blue – green light

chlorophyll b: absorbs yellow – green wavelength

carotenoids: absorbs blue/violet light and reflect orange

xanthophylls: absorbs yellow pigments

anthocyanin: absorbs red violet and blue

Chlorophyll is a green pigment; it reflects the green spectrum making leaves appear green to vision.

describe the roles of light and pigments in photosynthesis

Photosynthetic cells contain special pigments that absorb light energy. Different pigments respond to different wavelengths of visible light. Chlorophyll, the primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly.

Explain the separation of pigments by paper chromatography, based on their molecular structure

In paper chromatography, paper marked with an unknown, such as plant extract, is placed in a developing chamber with a specified solvent.The solvent carries the dissolved pigments as it moves up the paper. The pigments are carried at different rates because they are not equally soluble.

wavelengths of visible light

380 nm - 750 nm

violet, blue, green, yellow, orange, red

what is photosynthesis?

Photosynthesis helps channel the energy from the sun into chemical energy by using the light energy to drive the formation of sugar in plants

➢The sun itself is a giant combusting ball of fire

Within it, hydrogen is continually being converted to helium with a release of photonic energy which travels down to earth

➢Some of these photons within a certain wavelengths (visible part of the EM spectrum) are absorbed

➢A certain green pigment in the CHLOROPLAST of plants called CHLOROPHYLL is responsible for capturing the light energy from the sun.

-produces oxygen & glucose

thylakoid

flattened membrane sac inside the chloroplast, used to convert light energy into chemical energy

shorter wavelength = higher energy

longer wavelength = lower energy

What spectrum of electromagnetic waves are absorbed by the planets

Electromagnetic spectrum

What organelles in the plant are responsible for light absorption?

chlorophyll, chloroplast

What photoreceptive pigment is responsible for using light energy in photosynthesis

chlorophyll

white pigments

reflect all wavelengths

black pigments

absorb all wavelengths

green light

reflected

antenna colors

transmitted

photo- (definition)

-synthesis (definition)

light

making