nut2.5 - Energy Capacity to do work Types Energy cycles...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Energy • Capacity to do work Types Energy cycles • Plans trap energy from sun through photosynthesis -Store energy in sugar or fat molecules • Humans eat plants or eat animals that have eaten plants -Realease energy trapped by plants -Digest molecules to build human materials Metabolism Cells Mitochondia Anabolism • Reactions that build larger molecules by combining smaller ones • Require energy to form new bonds Catabolism • Reactions that break down large molecules into smaller ones • Release energy stored in chemical bonds that are broken Trapping energy • When chemical bonds are broken energy released • Energy used to produce chem bonds that result in the formation of ATP (adenosine triphosphate) • ATP yields energy Coupled reactions • Whern energy is needed for another reaction, bonds in ATP are broken and energy is released Efficiency • Conversion of chemical energy of food to trapped energy in bonds of ATP is about 50% efficient: the other 50 lost as heat Enymes (reaction catalysts)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/20/2008 for the course BIO 1322 taught by Professor Pool during the Spring '08 term at Lee CC.

Page1 / 3

nut2.5 - Energy Capacity to do work Types Energy cycles...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online