Name: Krisenz John D. Deslate
December 16, 2022
Date:
Subject: General Biology 1
General Instructions: Please answer the given questions in advanced, these questions will
be raised during our oral recitation.
1. WHAT IS THE PRIMARY SOURCE OF ENERGY FOR LIVING BEINGS ON
EARTH?
- The primary energy source of living organisms on earth is the Sun. The Sun
ultimately provides the energy needed for survival for nearly every living thing.
However, a large portion of organisms is not able to directly absorb and use
the sun’s energy as flows to the earth. Only autotrophic organisms have this
ability, and they capture the sun’s light energy through the process of
photosynthesis.
2. HOW IS LIGHT FROM THE SUN TRANSFORMED INTO CHEMICAL ENERGY TO
BE USED BY THE LIVING BEINGS ON EARTH?
- Through Photosynthesis, certain organisms convert solar energy (sunlight)
into chemical energy, which is then used to build carbohydrate molecules.
During photosynthesis in green plants, light energy is captured and used to
convert water, carbon dioxide, and minerals into oxygen and energy-rich
organic compounds.
3. WHAT IS THE CHEMICAL EQUATION OF PHOTOSYNTHESIS?
- The chemical equation for photosynthesis is 6CO2+6H2O→C6H12O6+6O2.
This means that the reactants, six carbon dioxide molecules and six water
molecules, are converted by light energy captured by chlorophyll (implied by
the arrow) into a sugar molecule and six oxygen molecules, the products.
4. WHICH ARE THE LIVING BEING THAT CARRY OUT PHOTOSYNTHESIS?
- Photosynthesis is carried out by plants, algae, and groups of bacteria
called cyanobacteria, which capture energy from sunlight to produce oxygen
(O2) and chemical energy stored in glucose (a sugar).
WHICH IS THE CELL ORGANELLE RESPONSIBLE FOR THE ABSORPTION OF
LIGHT FOR PHOTOSYNTHESIS PROCESS IN PLANTS AND ALGAE?
- Since chloroplasts are plant cell organelles that convert light energy into
relatively stable chemical energy via the photosynthetic process, it is clearly
objective that both plants and algae include chloroplasts. They are in charge
of collecting light energy for photosynthesis, which produces carbohydrates.
5. ARE THERE CHLOROPLASTS IN CYANOBACTERIA?
- Unfortunately, Cyanobacteria don’t have chloroplasts. Instead, the
chlorophyll is stored in thylakoids in their cytoplasm. The endosymbiosis
theory postulates that cyanobacteria may have evolved into the chloroplasts
that exist in plant cells today (Gault and Marler, 2009).
6. WHICH CHEMICAL ELEMENT IS CENTRAL IN THE CHLOROPHYLL MOLECULE?
- Magnesium (Mg) is the chemical element that is central in the chlorophyll.
The chlorin ring of the chlorophyll molecule has a magnesium ion in its center.
Every variation of chlorophyll shares this property. Magnesium will interact
with the nitrogen atoms (called as porphyrin ring) in the chlorin ring to assist
stabilize it and enable it to carry out its photosynthetic activity in plants and
algae.
In simple words, Magnesium (Mg) is needed by all plants to help capture the
sun's energy for growth and production through photosynthesis.
7. HOW DO CHLORPLASTS MULTIPLY?
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