lesson overview lesson overview energy and life reciprocal teaching helps you create your own...

Lesson OverviewLesson Overview Energy and LifeEnergy and Life

RECIPROCAL TEACHING

Helps you create your own meaning of contentHelps with METACOGNITIONEmpowers you to become better learners and

and enhance your peers learning as well!


Predict

What will happen or what will we learn?


Clarify

Reread or discuss words or points that were not clear.


Question

After reading, ask a question for others to answer.


Summarize

Tell the important ideas that we read.


Lesson OverviewLesson Overview8.1 Energy and Life8.1 Energy and Life


Chemical Energy and ATPEnergy is the ability to do work.

Your cells are busy using energy to build new molecules, contract muscles, and carry out active transport.

Without the ability to obtain and use energy, life would cease to exist.


Chemical Energy and ATP

One of the most important compounds that cells use to store and release energy is adenosine triphosphate (ATP).

ATP consists of adenine, a 5-carbon sugar called ribose, and three phosphate groups.


Storing Energy

Adenosine diphosphate (ADP) looks almost like ATP, except that it has two phosphate groups instead of three. ADP contains some energy, but not as much as ATP.


Using Biochemical Energy

One way cells use the energy provided by ATP is to carry out active transport.



ATP powers movement, providing the energy for motor proteins that contract muscle and power the movement of cilia and flagella.



Energy from ATP powers the synthesis of proteins and responses to chemical signals at the cell surface.



ATP is not a good molecule for storing large amounts of energy over the long term.

It is more efficient for cells to keep only a small supply of ATP on hand.

Cells can regenerate ATP from ADP as needed by using the energy in foods like glucose.


Heterotrophs and Autotrophs

Organisms that obtain food by consuming other living things are known as heterotrophs.


Heterotrophs and AutotrophsOrganisms that make their own food are called autotrophs.

Plants, algae, and some bacteria are able to use light energy from the sun to produce food. The process by which autotrophs use the energy of sunlight to produce high-energy carbohydrates that can be used for food is known as photosynthesis.


REVIEW Questions1. T or F Without the ability to obtain and use energy, life would cease

to exist.2. One of the most important compounds that cells use to store and

release energy is _______?3. What are the three parts to the structure of ATP?

1. What characteristic of ATP makes it exceptionally useful as a energy source?

1. ATP and ______ work together like a rechargeable battery.2. ATP is not good at storing energy _________________.3. Organisms that obtain food by consuming other living things are

known as __________________.4. Organisms that make their own food are called

___________________.

ATP

Adenine, Ribose and 3 Phosphate groups

It is rechargeable

ADPLong Term

Heterotrophs

Autotrophs

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