Biology Questions and Answers
Photosynthesis
- What is the primary source
of energy for living beings on
earth?
The sun, center and star of the milkyof our planetary system way galaxy (our
galaxy),is processed is the source of the energy thatand consumed by living
beings. Intense nuclear reactions in the
sun liberate ligradiations into thht and other energetice surrounding space. (^)
Some of this energy reaches our planet.
- How is light from the sun
transformed into chemical
energy to be used by the
living beings on earth?
Light from the sun is transfchemical energy contained in organicormed into
material bIn photosynthesisy the photosynth light, wateesis process.r and
carbon dioxide react and highly
energetic glucose mmolecular oxygen are made.olecules and
- What is the chemical
equation of photosynthesis?
The chemical equation of photosynthesis
is the following:
6 CO 2 + 6 H 2 O + light --> C 6 H 12 O 6 + 6
O 2
- Which are the living beings
that carry out photosynthesis?
Which is the cell organelle
responsible for the absorption
of light for the photosynthesis
process in plants and algae?
There are many beings (including all
animals)photosynth that desis. There are alsoo not carry out (^)
autotrophic beings that do not perform
photosynthchemosynthesis but they performesis. Plants, algae and (^)
cyanobacteriabeings. are photosynthetic
In plants anchlorophyll, a moleculd algae, light is absorbe present in ed by
cytoplasmic organelles called
chloroplasts.
- Are there chloroplasts in
cyanobacteria?
In cyanobacteria thchloroplasts and the chlorophyll layersere are no (^)
are dispersed in cytosol.
- Which chemical element is
central in the chlorophyll
molecule?
The chemical elthe chlorophyll molecule ement that is central inis magnesium. (^)
One atom othe center of an amalgam of magnesium is present inf eight
nitrogen-containing carbon rings.
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