Metabolism & Bioenergetics

3 Pages
68 Views
Unlock Document

Department
Biochemistry & Molecular Bio.
Course
BIOCHEM 524
Professor
David Gross
Semester
Fall

Description
Chapter 12 Notes: Metabolism and Bioenergetics • chemoautotrophs obtain all their metabolic building materials and free energy from simple inorganic compounds • photoautotrophs need CO2, water, nitrogen, and sunlight • heterotrophs directly or indirectly obtain all building materials and free energy from organic compounds produced by chemo- or photoautotrophs • cells catabolize large molecules to release free energy & then use free energy to anabolize large molecules • metabolism is the set of all catabolic and anabolic activities of an organism 12.1 Food and Fuel • the 4 essential macromolecular polymers taken in by heterotrophs are: o nucleic acids o polysaccharides o proteins o triacylglycerols • digestion reduces the polymers to their monomeric components: o amino acids o nucleotides o monosaccharides o fatty acids • this breakdown doesn’t yield significant amounts of free energy • cells take up the products of digestion o digestion takes place in the mouth stomach and small intestine, is catalyzed by hydrolytic enzymes  salivary amylase begins breakdown of starch  gastric & pancreatic proteases degrade proteins  lipases catalyze release of fatty acids from triacylglycerols o products of digestion absorbed by cells lining intestine  active transporters bring in monosaccharides  symport systems bring inA.A.’s & di- & tripeptides  highly hydrophobic lipids diffuse through membrane o some products reform inside cell  fatty acids re-form triacylglycerols  fatty acids linked to cholesterol, form cholesteryl esters  they are packaged together with proteins to form lipoproteins  released into lymphatic circulation before entering bloodstream o water-s
More Less

Related notes for BIOCHEM 524

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit