Biology 1401 Chapter 8 Photosynthesis
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- 1.Carbon atoms of CO(2) are incorporated into organic molecules in a series of dark reactions called
- A.
Carbon reduction.
- B.
Carbon synthesis.
- C.
Carbon fixation.
- D.
Carbon activation.
- E.
Carbon oxidation.
- 2.Most plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the
- A.
CAM cycle.
- B.
Carbon cycle.
- C.
Calvin cycle.
- D.
Krebs cycle.
- E.
Electron transport cycle.
- 3.Flattened sacs of internal membranes associated with photosynthesis are called
- A.
Chloroplasts.
- B.
Photosystems.
- C.
The stroma.
- D.
Thylakoids.
- E.
Cristae.
- 4.In green plant photosynthesis, the electron donor for the light dependent reaction is
- A.
Carbon dioxide.
- B.
Oxygen.
- C.
RuBP.
- D.
Chlorophyll II.
- E.
Water.
- 5.In the dark reactions of photosynthesis, CO(2) is added to a five-carbon sugar-phosphate known as
- A.
Cyclic AMP.
- B.
NADH.
- C.
NAD+.
- D.
RuBP.
- E.
CAM.
- 6.Light consists of units of energy called
- A.
Electrons.
- B.
Photons.
- C.
Protons.
- D.
Neutrons.
- E.
Pigments.
- 7.Visible light has a wavelength range of
- A.
400-700 nanometers.
- B.
200-800 nanometers.
- C.
200-400 nanometers.
- D.
200-700 nanometers.
- E.
0.001-100,000 nanometers
- 8.Which of the following has shortest wavelength by highest energy?
- A.
Infrared rays
- B.
X rays
- C.
Gamma rays
- D.
Ultra violet rays
- E.
Red light
- 9.Molecules that absorb light are called
- A.
Enzymes.
- B.
Electron carriers.
- C.
Pigments.
- D.
Photosynthesizers.
- E.
Absorbers.
- 10.Chlorophyll b absorbs in green wavelengths of light that chlorophyll a cannot absorb. In this respect, chlorophyll b acts as
- A.
An accessory pigment.
- B.
An energizer for photosynthetic bacteria.
- C.
A light absorber in the green light.
- D.
A more efficient pigment.
- 11.The photosystem channels the excitation energy gathered by absorption of light by any one of the pigment molecules to a specific "reaction center chlorophyll," which in turn passes the energy to
- A.
Photosystem I.
- B.
Photosystem II.
- C.
The primary electron acceptor.
- D.
The secondary electron center.
- E.
Cytochrome.
- 12.Which of the following is common to both cellular respiration and the light reactions of photosynthesis?
- A.
The transfer of electrons to glucose
- B.
The chemiosmotic formation of ATP
- C.
Oxygen is one of the byproducts
- D.
Mitochondria are essential organelles
- E.
Must have light
- 13.Photosystem II absorbs photons that are slightly more energetic than photosystem I, because it has a pigment called
- A.
P (680).
- B.
P (700).
- C.
Chlorophyll I.
- D.
Chlorophyll II.
- E.
Retinal.
- 14.
- A.
ATP
- B.
NADH
- C.
NADPH
- D.
Carbohydrates
- E.
Water
- 15.The dark reactions of photosynthesis are those that
- A.
Convert chlorophylls into enzymes.
- B.
Convert enzymes into chlorophylls.
- C.
Convert water into hydrogen and oxygen.
- D.
Convert CO(2) into reduced molecules (sugars).
- E.
Only occur in the dark.
- 16.In dark reactions, when CO(2) is added to a molecule of RUBP the product is
- A.
Citric acid.
- B.
Glucose.
- C.
Glyceraldehyde-3-phosphate.
- D.
Phosphoglycerate.
- E.
Pyruvate.
- 17.The cyclic carbon fixation reactions are also known as the
- A.
Krebs cycle.
- B.
Calvin cycle.
- C.
Citric acid cycle.
- D.
Tri carboxylic acid cycle.
- E.
Blackman cycle.
- 18.How many revolutions of the Calvin cycle are required to produce the sugar glucose?
- A.
2
- B.
3
- C.
4
- D.
5
- E.
6
- 19.In which part of the chloroplasts are the Calvin cycle enzymes located?
- A.
Stroma
- B.
Thylakoids
- C.
Grana
- D.
Envelope
- E.
Cristae
- 20.The photosynthetic electron transport causes the accumulation of protons in which part of the chloroplast?
- A.
Matrix
- B.
Stroma
- C.
Envelope
- D.
Outer membrane
- E.
Internal thylakoid space
- 21.Embedded in the thylakoid membrane and protuding as knobs form the outer surface into the stroma, there are
- A.
Enzymes that fix carbon dioxide.
- B.
Proton channels that synthesize ATP.
- C.
Chlorophyll a and b.
- D.
P(680) and P(700).
- E.
Specialized bundle sheath cells.
- 22.What products of light reactions of phtosynthesis are use in the Calvin cycle?
- A.
Oxygen and protons
- B.
Carbon dioxide and water
- C.
ATP and NADPH
- D.
ADP and NADP
- E.
Glucose and oxygen
- 23.Most of the atmospheric oxygen occurs as a result of phtosynthesis. From which of the following molecules is the oxygen derived?
- A.
Water
- B.
Carbon dioxide
- C.
Glucose
- D.
Chlorophyll
- 24.If they thylakoid membrane became leaky to ions, what would you predict to be the result on the light reaction?
- A.
It would stop ATP production
- B.
It would stop NADPH production
- C.
It would stop oxidation of H(2)O
- D.
It would stop CO(2) fixation
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