November 23, 2014 PRACTICAL CELL BIOLOGY LAB 5 Mitochondria The energy required to power living cells comes from the sun. Plants capture this energy and convert it to organic molecules. Animals can gain this energy by eating plants or other animals. The most efficient way for cells to harvest energy stored in food is through cellular respiration, a catabolic pathway for the production of adenosine triphosphate (ATP).Glucose, derived from food, is broken down during cellular respiration to provide energy in the form of ATP and heat. Cellular respiration has three main stages: glycolysis, the citric acid cycle and electron transport. The Krebs cycle and electron transport occur within mitochondria, Mitochondria are known as the powerhouses of the cell . Mitochondria are boun ded by a double membrane.Each of these membranes is a phospholipid bilayer with embedded proteins. The outermost membrane is smooth while the inner membrane has many folds. That folding increases the surface area inside the organelle. Many
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
November 23, 2014
practical Cell biology Lab 5
MitochondriaThe energy required to power living cells comes from the sun. Plants capture
this energy and convert it to organic molecules. Animals can gain this energy by
eating plants or other animals. The most efficient way for cells to harvest energy
stored in food is through cellular respiration, a catabolic pathway for the
production of adenosine triphosphate (ATP).Glucose, derived from food, is broken
down during cellular respiration to provide energy in the form of ATP and heat.
Cellular respiration has three main stages: glycolysis, the citric acid cycle and
electron transport. The Krebs cycle and electron transport occur within
mitochondria, Mitochondria are known as the powerhouses of the cell.
Mitochondria are bounded by a double membrane.Each of these membranes
is a phospholipid bilayer with embedded proteins. The outermost membrane is
smooth while the inner membrane has many folds. That folding increases the
surface area inside the organelle. Many of the chemical reactions happen on the
inner membrane of the mitochondria.
The double membranes divide the mitochondrion into two distinct parts: the
intermembrane space and the mitochondrial matrix. The intermembrane space is
the narrow liquid part between the two membranes while the mitochondrial matrix
is the part enclosed by the innermost membrane. Several of the steps in cellular
respiration occur in the matrix due to its high concentration of enzymes also matrix
contains mitochondrial deoxyribonucleic acid (mtDNA) and mitochondria