Structures and Processes Students who demonstrate understanding can:
References What is Cellular Respiration? Living organisms, including plantsanimalsand microorganismsgenerate their own energy in a process called Cellular Respiration.
Interestingly depending on the type of precursor for ATP production, organisms can be classified into two: Why is Cellular Respiration Important? As alluded to earlier, cellular respiration regardless whether it is aerobic or anaerobic provides the required amount of ATP for living organisms.
The energy present in the form of ATP can then be utilized to drive various intra-cellular physiological processes like the transport of molecules across cell membranes and the synthesis of bio-molecules. Wikimedia Aerobic respiration is the type of cellular respiration that requires the presence of oxygen.
Among all the types of cellular respiration it is the most efficient.
Plants and animals carry out this kind of respiration; plants obtain the precursor molecules from photosynthesis while animals obtain them from the food they eat i.
Photosynthesis Equation The equation for photosynthesis of plant cells is: Hence, the locations where occur in the cell vary from pathway to pathway.
Its overall chemical reaction of cellular respiration equation is simplified as: May range from 34 to 38 net ATP. The above cellular respiration formula is formulated by combining the three following processes into a single one. Such processes are explained below. Stages of Cellular Respiration 1.
Slide Share The first metabolic pathway during cellular respiration is glycolysis. As shown in the above diagram, glycolysis takes place in the cytosol.
However, two molecules are consumed during the preparatory phase, hence, resulting to a net of just two ATP molecules. Such reaction is the oxidative decarboxylation of pyruvate by the Pyruvate dehydrogenase complex PDC.
In simpler terms, the pyruvate from glycolysis is oxidized converted to acetyl coA, one molecule of NADH nicotinamide adenine dinucleotideand one molecule of carbon dioxide. The Krebs cycle, which occurs in the matrix of the mitochondrion, includes a series of oxidation-reduction reactions that result in the oxidation of the acetyl group to two carbon dioxide molecules.
Note that the goal of the Krebs cycle is to generate high energy electrons from carbon sources. Also notice that the process itself does not generate huge amounts of ATP and does not use oxygen as a precursor molecule. Wikimedia The final pathway in the cellular respiration PDF is comprised of the electron transport chain and oxidative phosphorylation which both occur in the inner membrane of the mitochondrion.
This former, which is a part of the latter, establishes the chemiosmotic gradient proton gradient across the inner membrane of the mitochondrion by oxidizing the NADH from the Krebs cycle whereas the latter manages the pathway in which the electrons from the donors are transferred to the acceptors in redox reactions.
In ETC, electrons are transferred from one complex to next where the electrons reduce oxygen to produce water. Such reactions produce the majority of ATP during cellular respiration. In total, the resulting product of aerobic cellular respiration from a single glucose molecule can be up to 38 ATP.
However, some organisms can only produce 34 to 36 because they have a different precursor molecule. What is the role of Oxygen in the process? Oxygen is an essential molecule in cellular respiration.
But where does it exactly fit in the picture? Basically, oxygen can be found at the end of the ETC during aerobic respiration where it accepts electrons while picking up protons in order to produce water molecules. When oxygen levels are depleted, electrons will be simply dispersed and the electron transport chain will discontinue.
Of course no ATP will be produced, causing the cease of some physiological functions in the cell. Fermentation Lactic Acid Fermentation Source:Massachusetts Comprehensive Assessment System Released Test Questions.
As Massachusetts transitions its testing program to next-generation assessments, the Department is continuing the regular release of MCAS test questions. Cell Structure and Function.
Characteristics of Living Organisms Prokaryotic Cell Structure III. Structures Internal to the Cell Wall Functions of the Plasma (Cytoplasmic) Membrane: 1. Selective barrier that regulates the passage of materials in and out of the cell.
EDITORIAL Nanotechnology, nanomedicine and nanosurgery An exciting revolution in health care and med-ical technology looms large on the horizon. One hypothesis for the origin of multicellularity is that a group of function-specific cells aggregated into a slug-like mass called a grex, which moved as a multicellular grupobittia.com is essentially what slime molds do.
Another hypothesis is that a primitive cell underwent nucleus division, thereby becoming a coenocyte.A membrane would then form around each nucleus (and the cellular .
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Check out this list and find the right one for you. The Cell Structure and Function The cell is the lowest level of structure capable of performing all the activities of life.
The first cells were observed and named by Robert Hooke in from slice of cork. 2 The Cell Thoery Proposed by Matthais Schleiden and Theodor Schwann in