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What is a characteristic of mitochondria that suggests that they might have evolved from free living bacteria?
The plasma membrane of a mitochondrion, forming the surface of this organelle, is the site of many important steps of cellular respiration.
What metabolic processes might have evolved first a. Aerobic respiration b.oxygenic photosynthesis c. glycolosis?
Glycolysis likely evolved first since it is a simple metabolic pathway that can occur in the absence of oxygen, making it a foundational process for cellular metabolism. Oxygenic photosynthesis is thought to have evolved before aerobic respiration because it involves the use of solar energy to produce organic compounds. Aerobic respiration evolved later to efficiently extract energy from these organic compounds in the presence of oxygen.
How might an organism benefit by carrying Out fermentation instead of cellular respiration?
Organisms prefer cellular respiration over fermentation.Cellular respiration gains a cell 38ATP molecules per every glucose molecule.Fermentation only gains 2ATP per glucose molecule.Obviously, you can see the difference. Cellular respiration provides much more energy for the cell, and this is why they prefer this over fermentation.There are organisms like facultative anaerobes that can preform either process, but they do cellular respiration if oxygen is available. These organisms only preform fermentation if they are in an "oxygen debt." (Like when you run, you are using a lot of energy, and you cannot get enough oxygen for cellular respiration. You are in "oxygen debt," and your muscle cells start doing fermentation. But your muscle cells prefer using aerobic reparation (cellular respiration) so you start panting. Once you get your breath back, oxygen is restored and your cells again preform cellular respiration and get more energy faster.)However, there are still obligate anaerobes that are poisoned by oxygen, and only use fermentation.Hope this helped!!
What modifications of cellular respiration might you expect to find in dormant seeds?
In dormant seeds, cellular respiration is typically reduced to minimal levels due to limited oxygen availability and low metabolic activity. The seeds rely predominantly on anaerobic metabolism for energy production. Once the seeds germinate and become active, cellular respiration increases to support growth and metabolic processes.
How might earth evolved if gravity had not been present?
It could not have evolved at all. Earth formed from pieces of rock in the early solar system grouping together, attracted to one another by gravity.
Why might aerobic respiration stop?
Aerobic respiration may stop due to a lack of oxygen, which is essential for the process to occur. Additionally, the accumulation of metabolic byproducts, such as carbon dioxide, can inhibit cellular functions. Other factors like nutrient depletion, damage to cellular components, or unfavorable environmental conditions can also lead to the cessation of aerobic respiration.
How are oxygen and carbon dioxide and other waste gases exchanged in the lungs and body tissues?
Not sure but I think it might be cellular respiration! Hope this helped! :)
How oxygen carbon dioxide and other waste gases are exchanged in the lungs and body tissues.?
Not sure but I think it might be cellular respiration! Hope this helped! :)
What might happen if a cell lost its ability to perform cellular respiration?
Without cellular respiration, the cell would not be able to produce energy in the form of ATP. This lack of energy would impair the cell's ability to carry out essential functions, ultimately leading to cell death.
How is C6H12O6 important to photosynthesis and cellular respiration?
C6H12O6 (glucose) is relevant to both of these processes, because... Glucose is the end product of photosynthesis. After generating ATP and NADPH from the "light reactions" in the electron transport chain, both these molecules (ATP and NADPH) go on to power the Calvin Cycle, or "dark reaction". The end product of the Calvin Cycle is a molecule of G3P, which is made into glucose. Cellular respiration is essentially the "inverse" of photosynthesis- where photosynthesis makes glucose, cellular respiration breaks it down into ATP, so that it might be used by the cell. There is aerobic and anaerobic cellular respiration, which occur differently, but the common goal of the two processes is to break down glucose. Glycolysis precedes cellular respiration itself, which is the actual process of breaking down the glucose molecules into pyruvate.
A modle of mitochondria?
Mitochondria are double-membraned organelles found in eukaryotic cells responsible for generating ATP through cellular respiration. They contain their own DNA and ribosomes, suggesting they might have evolved from symbiotic bacteria. Mitochondria have a highly folded inner membrane called cristae, which increases the surface area for ATP production.
What cells in your body might need to do more cellular respiration than others?
Cells that require more energy, such as muscle cells, neurons, and liver cells, tend to perform more cellular respiration. Muscle cells, especially during exercise, demand high ATP production for contraction. Neurons require energy for maintaining electrical impulses and synaptic activity, while liver cells are involved in metabolic processes that also require significant energy. Therefore, these cells engage in increased cellular respiration to meet their heightened energy needs.
