Energy Activity

Energy Activity

By: Abigail Santiago

Introduction on Krebs Cycle

The Krebs cycle (or citric acid cycle) is a sequence of chemical reactions used by most aerobic organisms and parts of the process of aerobic cell metabolism to produce energy. The Krebs cycle is also a part of cellular respiration.

The Krebs cycle comes after the link reaction and provides the hydrogen and electrons needed for the electron transport chain. The adenosine triphosphate (ATP) is a molecule which carries energy in chemical form to be used in other cell productions.

• Two molecules of carbon dioxide are given off

• One molecule of ATP is formed

• Three molecules of NAD+ are combined with hydrogen (NAD+ NADH),

• One molecule of FAD combines with hydrogen (FAD --> FADH2)

Multiple Choice

What is a Krebs Cycle?

• A electron

• A sequence of chemical reactions used to produce energy
  

• A link reaction

• A type of chemical

Fill in the Blanks

Introduction on Electron Transport Chain

Electron transport chains (ETC) are the cellular mechanisms used for gathering energy from sunlight in photosynthesis. ETC can also occur in redox reactions, such as the oxidation of sugars in cellular respiration.

In aerobic respiration, each molecule of glucose leads to about 34 moelcules of ATP being produced by the ETC.

The electron transport chain consists of a sequence of redox reactions in which electrons are moved from a donor molecule to an acceptor molecule. The basic force guiding these reactions is the fee energy (energy available to do work) of the reactants and products.

ATP synthase is an enzyme found between all domains of life. It is powered by a transmembrane proton electrochemical gradient. This is the result of the sequence of redox reactions. The fee energy is used to drive ATP synthesis.

Multiple Select

What can ETC occur in? What is an example of ETC?

• redox reactions

• ATP

• oxidation of sugars in cellular respiration

• aerobic respiration

Poll

ETC are cellular mechanism used for gathering energy from _____?

Introduction on Glycolysis

Glycolysis is the process In which one glucose molecule is brocken down to form two molecules of pyruvic acid. The glycolysis process is a multi-step metabolic pathway that occurs in the cytoplasm of animal cells, plant cells, and the cells of microorganisms.

Metabolic pathway occurs in variations of nearly all organisms, including aerobic and anaerobic. Gylcolysis has ten intermediate compounds, catalyzed by ten different enzymes.

The Process of Glycolysis

• 2ATP -->4ATP + 2(NADH + H+) + 2 pyruvate (net production of 2ATP)

Multiple Select

The Glycolysis process is a metabolic pathway that occurs in the cytoplasm of...?

• animal cells

• a glucose molecule

• plant cells

• microorganism cells