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ATP

ATP. BOOM!. WHAT DO YOU DO?. WORK! Mechanical Chemical Transport . What do you look like?. Adenine. 3 Phosphate groups. Ribose. ATP!!!!!!. Bonds between P groups of ATP’s can be broken by hydrolysis (ADP) ATP + H2O  ADP + P What do you think ΔG is? – or +??? -7.3 kcal/ mol.

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ATP

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  1. ATP BOOM!

  2. WHAT DO YOU DO? • WORK! • Mechanical • Chemical • Transport

  3. What do you look like? Adenine 3 Phosphate groups Ribose

  4. ATP!!!!!! • Bonds between P groups of ATP’s can be broken by hydrolysis (ADP) • ATP + H2O  ADP + P • What do you think ΔG is? – or +??? • -7.3 kcal/mol

  5. Bonds • Which molecule do you think is more stable (A or B)? • Are P bonds strong or weak? How do you know? MORE STABLE! A B

  6. Bonds– OPOO! • Phosphates are negative. Being negative means: • REPULSION  MORE UNSTABLE REGION

  7. Phosphorylation • When the P leaves the ATP where does it go? • Which molecule is PHOSPHORYLATED (A or B)? • Why does the P attach to another molecule? A B

  8. Adp + p  ATP • Where do we get the E to “recharge” ADP? • E released from catabolic reactions

  9. Release of energy during the hydrolysis of ATP comes from the chemical change to a state of lower free energy! ATP Energy from Catabolism (sunlight or food) Energy for cellular work and for chemical synthesis ADP + P

  10. Review • Describe the forms of energy found in an apple as it grows on a tree, then falls and is digested by someone who eats it?

  11. answer • The apple has potential E in its position hanging on the tree. The sugars it contains have chemical E. The apple has kinetic E as it falls from the tree to the ground. When the apple is digested and the molecules are broken down, some of the chemical E is used to do work.

  12. Review • At nighttime celebrations, revelers can sometimes be seen wearing glow in the dark necklaces. The necklaces start glowing once they are “activated” (snapping the necklace in a way that allows 2 chemicals to react and emit light in the form of chemiluminescence). Is the reaction exergonic or endergonic? Explain.

  13. answer • Exergonic. It releases energy in the form of light.

  14. Review • In most cases, how does ATP transfer E from exergonic to endergonicreactions in the cell?

  15. answer • ATP transfers E to endergonicprocessess by phosphorylating other molecules. • **Exergonic processes phosphorylate ADP to regenerate ATP**

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