2.2.10 Respiration FMQuiz Homework Solution
Q. Explain the role of ADP in relation to the small
amount of energy released during the first stage of
respiration.
A. First stage uses energy / combines with
phosphate / to form ATP/ ATP stores energy in high
energy bond
Q. Give one product, other than electrons, of the
reactions in Kreb’s cycle.
A. CO2 or ATP or Hydrogen ions (protons)
Q. What is the first stage process of respiration
called?
A. Glycolysis
Q. The electrons released in Kreb's Cycle pass along
a transport chain and release energy. To what use
is this energy put?
A. To form ATP
Q. What is the final product of the first stage of
respiration under aerobic conditions?
A. Pyruvic acid (Pyruvate)
Q. To what are the electrons transferred at the end
of the electron transport chain in aerobic
respiration?
A. Oxygen or H+ (protons)
Q. If conditions in a human muscle cell become
anaerobic pyruvic acid is converted to another
substance. Name this other substance.
A. Lactic acid
Q. Where in the cell does the first stage of
respiration occur?
A. Cytoplasm
Q. To what is pyruvic acid (pyruvate) converted
under anaerobic conditions in yeast?
A. Ethanol & CO2
Q. In Stage 2 of respiration electrons pass along an
electron transport chain, releasing energy. In what
molecule is this energy stored?
A. ATP
Q. Under aerobic conditions pyruvate is converted
to an acetyl group and a small molecule is released.
Name this small molecule.
A. Carbon dioxide
Q. In the first stage of respiration there is a release
of ATP as glucose is converted to another
substance. Name this other substance.
A. Pyruvic acid or pyruvate
Q. In aerobic respiration the acetyl group enters a
cycle of reactions. What name is given to this
cycle?
A. Krebs cycle
Q. Name a compound to which pyruvate (pyruvic
acid) may be converted, in the absence of oxygen.
A. Lactic acid or ethanol & CO2
Q. In what part of the cell does the second stage of
respiration take place?
A. Mitochondrion
Q. In the mitochondrion pyruvate is broken down
to CO2 and a two-carbon compound. Name this
two-carbon compound.
A. Acetyl Co-enzyme A
Q. For what is ATP an abbreviation?
A. Adenosine Triphosphate
Q. Name the group of protein molecules that
control the rate of respiration.
A. Enzymes
Q. What is fermentation?
A. Anaerobic respiration or respiration that
produces either ethanol or lactic acid
Q. Is oxygen required for the first stage of
respiration?
A. No
Q. C6H12O6 + 6O2  ENERGY + 6CO2 + 6H2O
Is this the equation for photosynthesis or
respiration?
A. Respiration
Q. How did you know that fermentation had
ceased?
A. Bubbling stopped
Q. Is oxygen required for the second stage of
respiration?
A. Yes
Q. Where does Kreb’s cycle take place?
A. Mitochondrion
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