1. In photosynthesis, chlorophyll functions in 9. Through ...
1. In photosynthesis, chlorophyll functions in
changing
(1) glucose molecules to starch
(2) water and carbon dioxide to sugar
(3) light energy to chemical bond energy
(4) hydrogen bonds to water
2. Over a 24-hour period, which factor would have
the least effect upon the rate of photosynthesis in
a geranium plant?
(1) concentration of carbon dioxide in the air
(2) quantity of nitrates in the soil
(3) wavelengths of light
(4) availability of water in the soil
3. The basic inorganic materials used during
photosynthesis are
(1) H2O AND C6H12O6 (3) H2O and CO2
(2) O2 and CO2
(4) C6H12O6 and CO2
4. In the photosynthetic reaction, which event
normally occurs before the other three?
(1) oxygen release
(3) PGAL synthesis
(4) glucose formation
(2) water absorption
5. By which process are CO2 and H2O converted to
carbohydrates?
(1) transpiration
(3) fermentation
(2) respiration
(4) photosynthesis
6. At optimum light intensity, which atmospheric
gas most directly influences the rate of
photosynthesis?
(1) nitrogen
(3) carbon dioxide
(2) oxygen
(4) hydrogen
7. PGAL is synthesized during
(1) Anaerobic respiration
(2) Aerobic respiration
(3) Photochemical reactions of photosynthesis
(4) Carbon-fixation reactions of
photosynthesis
8. Most of the oxygen in the atmosphere results
from the process of
(1) fermentation
(3) regulation
(4) respiration
(2) photosynthesis
for more review
9. Through the use of the isotope oxygen-18,
scientists have demonstrated that the oxygen
released during photosynthesis comes from
(1) both carbon dioxide and water molecules
(2) the splitting of water molecules
(3) the breakdown of chlorophyll
(4) PGAL in the dark reaction
10. Hydrogen atoms and carbon dioxide molecules
participate in a series of chemical changes that
produce a three-carbon sugar in photosynthesis.
These chemical changes are part of
(1) the photochemical reactions, only
(2) the carbon-fixation reactions, only
(3) both the photochemical and the carbon
fixation reactions
(4) neither the photochemical nor the carbon
fixation reactions
11. Photosynthesis transforms molecules of water
and carbon dioxide into molecules of
(1) carbohydrate and oxygen
(2) carbohydrate and nitrogen
(3) polypeptide and oxygen
(4) polypeptide and nitrogen
12. Green plants usually do not excrete large
amounts of CO2 because they use CO2 in the
process of
(3) anaerobic
(1) photosynthesis
respiration
(2) hydrolysis
(4) transpiration
13. The basic raw materials for photosynthesis are
(1) water and carbon dioxide
(2) oxygen and water
(3) sugar and carbon dioxide
(4) water and oxygen
14. Which substances must a green plant obtain
from its environment to carry on photosynthesis?
(1) glucose and water
(2) oxygen and chlorophyll
(3) carbon dioxide and water
(4) carbon dioxide and oxygen
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