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- 1. Multiple Choice
A student notices pairs of cells with an opening on the bottom of a leaf while looking it under the microscope. The main purpose of these openings and the cells around them is
removing excess sugars
synthesis of carbon dioxide
regulating gas exchange
purification of water
- 2. Multiple Choice
a student placed a test tube containing a plant near a light source. He then counted the number of bubbles released by the plant in 1 minute. The gas that was produced was most likely
carbon dioxide
oxygen
nitrogen
all of these
- 3. Multiple Choice
the level of carbon dioxide in our atmosphere has been increasing dramatically. It has been said that growing green plants would help slow this increase. The best explanation for this is that plants
serve as food for herbivores
serve as a nonrenewable resource
remove carbon dioxide from the atmosphere during respiration
remove carbon dioxide from the atmosphere during photosynthesis
- 4. Multiple Choice
the 2 diagrams represent a sugar molecule and a fat molecule that are used by living organisms. Which statement best describes these 2 molecules?
sugar molecules are inorganic and fat molecules are organic
sugar molecules are organic and fat molecules are inorganic
energy for life process can be stored in the chemical bonds of both molecules
energy for life processes can be stored wihin the chemical bonds on sugar molecules only
- 5. Multiple Choice
over time, a tree that once had a total mass of 300g increased in mass to 3000 kg. This increase in mass comes mostly from
soil that all plants need to grow
oxygen that enters through the leaf openings
chloroplasts that enter the roots and move to the leaves
carbon dioxide that enters through the leaf openings
- 6. Multiple ChoiceWhich of the following is the correct equation for PHOTOSYNTHESIS?CO2 + light + H2O --> O2 + SugarCO2 + sugar + H2O --> O2 + lightO2 + light + H2O --> CO2 + SugarCO2 + O2 + H2O --> Light+ Sugar
- 7. Multiple ChoiceWhich organisms perform Photosynthesis?Only AutotrophsOnly HeterotrophsAutotrophs and Heterotrophs
- 8. Multiple ChoiceWhat is the pigment in chloroplasts that performs photosynthesis?ChlorosynthesisChlorophyllADPElectron Transport
- 9. Multiple ChoiceWhich gas is removed from the atmosphere during photosynthesis?hydrogenoxygennitrogencarbon dioxide
- 10. Multiple ChoiceWhat are the products of photosynthesis?water and carbon dioxideoxygen and glucoseoxygen and carbon dioxideoxygen and water
- 11. Multiple ChoiceChloroplasts are...Structures of animal cells to produce ATPOrganelles where lipids are elaboratedSpecialized structures of plants where food is madeWaste organelle of plants
- 12. Multiple ChoiceWhich organelle from the plant cell is primarily responsible for converting sunlight to energy?MitochonriaNucleusVacuoleChloroplast
- 13. Multiple ChoiceThe ____________ is the most photosynthetic part of a plant.leafflowerrootsstem
- 14. Multiple Choice____________________ provides the energy necessary for photosynthesis.watersunlightglucosesoil
- 15. Multiple ChoiceThe leaf structure that allows carbon dioxide to enter the leaf and Oxygen to exit the leaf is...phloemstomataveinstem
- 16. Multiple Choice
What major energy transformation occurs during photosynthesis?
Thermal --> Chemical
Kinetic --> Radiant
Chemical --> Radiant
light energy --> Chemical
- 17. Multiple ChoiceWhich of these conditions would decrease the rate of photosynthesis in a plant?Above average precipitationChanging the daylight hours from 14 hrs to 10 hrsChanging the CO2 concentration from 380 ppm to 410 ppmAll of these choices
- 18. Multiple Choice
An inorganic molecule required by green plants for the process of photosynthesis is
Glucose
Starch
Carbon dioxide
- 19. Multiple Choice
Which activity occurs in the process of photosynthesis?
Chemical energy from organic molecules is converted into light energy.
Organic molecules are obtained from the environment.
Organic molecules are converted into inorganic food molecules.
Light energy is converted into the chemical energy of organic molecules.
- 20. Multiple Choice
Photosynthesis is the process by which
the potential energy of simple sugars is transferred to ATP molecules
simple sugars are gradually broken down to form lactic acid or alcohol
two simple sugar molecules combine to form maltose and water
. light energy is converted into the chemical energy of simple sugars
- 21. Multiple Choice
Eating a sweet potato provides energy for human metabolic processes. The original source of this energy is the energy
in protein molecules stored within the potato
from starch molecules absorbed by the potato plant
made available by photosynthesis
. in vitamins and minerals found in the soil
- 22. Multiple Choice
The dense needles of Douglas fir trees can prevent most light from reaching the forest floor. This situation would have the most immediate effect on
Producers
Carnivores
Herbivores
Decomposers
- 23. Multiple Choice
For which organic compounds must information be encoded in DNA for green plants to synthesize the other three compounds?
sugars
starches
starches
proteins
- 24. Multiple Choice
Which statement describes all enzymes?
They control the transport of materials.
They provide energy for chemical reactions.
They affect the rate of chemical reactions.
They absorb oxygen from the environment.
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