0001pt;>Background:Whether it was volcanic activity that spewed sulfur
dioxide and ash into the atmosphere, or a giant meteor that crashed into the
Earth blasting dust and debris into the sky, both theories of what caused the
dinosaurs to become extinct share one critical similarity light from the sun
was obliterated. The result of the months long darkness was the mass
extinction of nearly 70% of all creatures on Earth.Like the dinosaurs, humans cannot live without the
sun. Not only does it provide light and warmth, it is also the energy source
for arguably the most important chemical reaction on Earth: photosynthesis.Answer the following assignment questions:1. Explain how photosynthesis and respiration are
linked in order to provide you with energy from the food you eat.Include in your essay:Complete descriptions of photosynthesis and aerobic
respiration.Describe how these two processes are linked between
plants and animals based on the reactants and products (water, carbon dioxide,
glucose and oxygen) of both pathways.Include a description of how energy is transferred
from sunlight to ATP, from ATP to sugars, and from sugars to your cells.2. In the absence of oxygen some cells and organisms
can use glycolysis coupled to fermentation to produce energy from the sugar
created by photosynthesis.Explain the role of fermentation in allowing an
organism to generate energy for its cell(s) in the absence of oxygen.Include any reactions required for this process, and
explain how the energy from the sun ends up as chemical energy for the
anaerobic organism or cell.3. Cells use enzymes as biological catalysts to
increase or accelerate the rate of reactions, such as those in photosynthesis
or glycolysis. This allows reactions to occur under conditions that sustain
life.Explain how an enzyme catalyzes a reaction. Include in
your essay the three main steps of the cycle of enzyme-substrate interactions.How is enzyme activity regulated by the cell?ReferenceAudesirk, T., Audesirk, G., and Byers, B. (2008).
Biology Life on earth with physiology (8th Ed.). San Francisco, CA: Benjamin
Cummings.Your essays should be several paragraphs in length for
each question, be thoroughly paraphrased, and include appropriate in-text
citations and a reference list in APA format. For information on Macintosh Word shortcuts, click
here.Please submit your assignment.For assistance with your assignment, please use your
text, Web resources, and all course materials. Please refer to the following
multimedia course material(s)Unit 2: Cellular BasicsUnit 2: The CellExternal Web links:Unit 2: Cellular RespirationUnit 2: Center for the Study of Early Events in
Photosynthesis
Unit 2: Introduction to Photosynthesis