L4enzymesv2_sp10

L4enzymesv2_sp10 - Metabolism & Enzymes Chemical...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Metabolism & Enzymes
Background image of page 1

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

View Full DocumentRight Arrow Icon
Chemical Reactions With respect to energy, chemical reactions can be: Exergonic: “energy outward” or releases free energy to its surroundings; spontaneous Endergonic: “energy inward” or absorbs free energy from its surroundings; not spontaneous Free energy is Δ G : energy available to do work in a system like a cell Reactions in a closed system eventually reach equilibrium and can do no work. Metabolic disequilibrium is one of the defining features of life.
Background image of page 2
Metabolic Pathways The totality of an organism’s chemical reactions is called metabolism. Metabolism occurs as a result of interactions between molecules in cells. Metabolic pathways begin with a specific molecule, which is then altered in a series of defined steps to form a specific product. Catabolic: from complex to simple—releases energy Anabolic: from simple to complex—requires energy A specific enzyme catalyzes each step of the pathway.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Organization of Metabolic Pathways The product of one enzyme-controlled reaction serves as the substrate for the next reaction. Picture an assembly line with each enzyme carrying out a step.
Background image of page 4
Cellular Work Three types of work:
Background image of page 5

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

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/22/2010 for the course BIO 183 taught by Professor Parks during the Spring '07 term at N.C. State.

Page1 / 25

L4enzymesv2_sp10 - Metabolism & Enzymes Chemical...

This preview shows document pages 1 - 6. Sign up to view the full document.

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