Question: Show
Problem 3 Easy DifficultyVideo Answer:  Get the answer to your homework problem. Try Numerade free for 7 days Input your name and email to request the answer Numerade Educator Numerade Educator Like Report Problem 1 Problem 2 Problem 3 AnswerRelated CoursesBiology
Introductory Biology
Chapter 2 Cell Biology
Section 25 Anaerobic Vs Aerobic Respiration Related TopicsThe Cell Metabolism 101 Cellular Respiration and Fermentation DiscussionYou must be signed in to discuss. Top Biology Educators
Marissa MotaBridgewater State University
Dr. Bridgette DrummondUniversity of North Carolina at Wilmington
Matthew BradleyAmherst College
Molly FooteFlorida State University Biology CoursesLectures
0:00 What is Metabolism In biology, metabolism is the set of life-sustaining chemical transformations within the cells of living organisms. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments. The word metabolism can also refer to all chemical processes involved in living, including digestion and the transport of substances into and between different cells, in which case the set of processes must be jointly referred to as "metabolism" and "bioenergetics".
0:00 Cellular Respiration - Overview In biology, cellular respiration is a metabolic process in which cells use oxygen and certain nutrients to generate energy in the form of ATP. Cellular respiration is considered an exothermic reaction which releases heat. The overall reaction occurs in a series of individual chemical reactions. These are often catabolic reactions, in which large molecules are broken down to release energy. Cellular respiration is only one of the many ways that living organisms release energy to maintain life. Others include anaerobic digestion, fermentation and photosynthesis. Join Course Recommended Videos00:50 Nearly all organisms on Ea… 04:47 Early estimates suggested … 02:27 Why does aerobic respirati… 00:55 Both prokaryotic and eukar… 02:00 Why would an organism perf… 01:24 Why is glycolysis consider… 01:00 Explain why pyruvate canno… Watch More Solved Questions in Chapter 2
Problem 1 Problem 2 Problem 3 Video TranscriptNo transcript available Why do scientist think that glycolysis evolve before the other stages of cellular respiration?Scientists think that glycolysis evolved before the other stages of cellular respiration. This is because the other stages need oxygen, whereas glycolysis does not, and there was no oxygen in Earth's atmosphere when life first evolved about 3.5 to 4 billion years ago.
How is glycolysis different from the other steps in cellular respiration?Glycolysis is unique because it is completely anaerobic - meaning it doesn't require oxygen and will proceed with or without it. Unlike the next steps in cellular respiration, which absolutely require oxygen to occur.
Why is glycolysis The first step in aerobic and anaerobic respiration?Glycolysis, which is the first step in all types of cellular respiration is anaerobic and does not require oxygen. If oxygen is present, the pathway will continue on to the Krebs cycle and oxidative phosphorylation. However, if oxygen is not present, some organisms can undergo fermentation to continually produce ATP.
What is the main advantage of aerobic respiration of anaerobic respiration?Thus, aerobic respiration releases much more energy than anaerobic respiration. The amount of energy produced by aerobic respiration may explain why aerobic organisms came to dominate life on Earth. It may also explain how organisms were able to become multicellular and increase in size.
|
Why do scientists think that glycolysis evolved before the other stages of cellular respiration?
Urheberrechte © © 2024 toptenid.com Inc.
