General ---------Biology----------------------------------------------------- ------------------Online-------------------------------------- Ch. 9 Cellular Respiration: Harvesting Chemical Energy

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___ 1.  Is oxygen required to burn a candle and release chemical energy as heat and light? 
a. yes   b  no.

___ 2.  Is oxygen required in cellular respiration to enzymatically "burn" a sugar molecule and release chemical energy?
a. yes   b. no

___ 3.  Cellular respiration breaks down the food molecules and releases energy by
a. smashing the protons and neutrons in the nucleus of the atoms
b. breaking the covalent bonds between the atoms making up the food molecule
c.  breaking hydrogen bonds between food and water molecules

___ 4.  What happens to the individual C, H and O atoms in food molecules, after cellular respiration has broken all the food molecules covalent bonds and extracted the chemical energy (calories)? They
a.  spontaneously react to form amino acids and build proteins.
b.  spontaneously react with each other, filling their outer shells and forming CO₂ and H₂O.

___ 5.  The breakdown of food in cellular respiration is best described as
a.  endergonic and anabolic
b.  exergonic and catabolic

___ 6.  The production of food (sugar) by photosynthesis is best described as
a.  endergonic and anabolic
b.  exergonic and catabolic

In Ch. 7 you were asked to label a plant cell showing the inputs and outputs to a mitochondrion and to an adjacent chloroplast.  Review this figure.  Check your answers.

___ 7.  Some of the energy released from food molecules by cellular respiration is transferred to a molecule of ADP, and stored in a covalent bond between ADP and a P0₄, making
a.  ADP
b.  ATP
c.  carbon dioxide

___ 8.  Chemical energy is transferred from food molecules to ATP molecules. What is actually transferred from the food to the covalent bond in the ATP? 
a.  electromagnetic radiation
b.  heat
c.  a high energy electron in the covalent bond between ADP and the phosphate
d.  magic

___ 9.  Is any of the transferred energy lost as heat; or is the transformation 100% efficient?
a.  some is lost as heat
b.  it is 100% efficient.

___ 10.  The process described above is called cellular respiration, and it is
a. anabolic, endergonic and decreases entropy
b. catabolic, exergonic and increases entropy

___ 11.  The chemical pathways of cellular respiration are associated with which organelle?
a.  ribosome
b. Golgi 
c. mitochondria

12.  Go to the Hierarchy Table and locate where cellular respiration takes place and where "organismic respiration," or breathing, takes place.