Module 4 Bio 110
Terms in this set (23)
What is the role of mitochondria in plant cells?
a. produces sugars
b. facilitates photosynthesis
c. enables work to be done in these cells by producing ATP
d. none; plant cells do not have mitochondria
Which of the following best explains the fall leaf color change in deciduous plants of western North Carolina?
a. all of the photosynthetic pigments are dying a slow death
b. synthesis of new chlorophyll pigments stops, allowing accessory pigments to become evident
c. carotenes and xanthophylls kill the chlorophylls
d. production of accessory pigments increases
All life forms are composed of carbon-based molecules. How does carbon enter the living portion of an ecosystem?
a. soil bacteria help release carbon from rocks allowing it to diffuse into plant root cells
b. at high concentrations atmospheric CO2 diffuses into all living organisms of an ecosystem
c. organic compounds are eaten by consumers
d. atmospheric CO2 diffuses into photosynthetic cells and is converted into glucose during photosynthesis
There are many structures and chemicals involved in photosynthesis. Which of these are correctly matched with their role in the process?
a. H2O: prevents overheating
b. O2: provides energy to initiate photosynthesis
c. photosynthetic pigments: a waste product of the process
d. energized electrons: enable formation of ATP and NADPH
Which of the following best describes the summary chemical equation for photosynthesis?
a. oxygen + sugar yields water + carbon dioxide + light energy
b. oxygen + water + carbon dioxide yields sugar + light energy
c. water + carbon dioxide + light energy yields sugar + oxygen
d. carbon dioxide + sugar + light energy yields oxygen + water
Since all biomass is composed of organic compounds, substantial quantities of carbon are required. What is the source of carbon for plants?
a. from CO2 in the atmosphere
b. from the mineral composition of the soil
c. from the water in the soil
d. from decaying organic matter
Which of the following is true of this chemical reaction?
6 CO2+ 6 H2O ------> C6H12O6 + 6 O2
a. 6 molecules of glucose are produced
b. each oxygen molecule has 6 atoms
c. reactants include six molecules of water
d. all reactants and products are organic molecules
During the Calvin Cycle
a. photosynthetic pigments absorb solar energy
b. ATP and NADPH facilitate the conversion of six carbon dioxide molecules into one glucose molecule
c. water combines with carbon dioxide to form glucose
d. visible light energy splits water to form oxygen
What is true of an organism that is a photosynthetic autotroph?
a. it consumes bacteria
b. it converts inorganic molecules into organic molecules
c. it decomposes organic molecules
d. it consumes heterotrophs
Eating a plant-based diet is more efficient use of energy than eating an animal-based diet.
Chlorophyll appears green because it
a. absorbs wavelengths in the green region of the visible spectrum
b. absorbs all the wavelengths of the visible spectrum
c. reflects wavelengths in the green region of the visible spectrum
d. reflects all the wavelengths of the electromagnetic spectrum
Energy conversions are not 100% efficient. Most of the energy lost at each conversion is ______.
What happens when a photosynthetic pigment absorbs light energy?
a. an electron is energized and is moved to a higher energy level
b. light energy is altered so that it reflects a different color of the visible spectrum
c. it converts light energy into glucose
d. it splits water releasing oxygen gas
Which type of matter best describes chlorophyll?
a. an organelle
b. a cell
c. an organism
d. a molecule
The greenhouse effect is not an environmental problem; it is a phenomenon in which greenhouse gases trap heat (infrared energy) that would otherwise be reflected into space. This warms our planet, making it habitable.
To avoid high levels of accumulated toxins due to biomagnification, one should avoid eating
c. top-level carnivores
Assume normal atmospheric conditions. During the growing season, CO2 will
a. exit a leaf's phloem by facilitated diffusion
b. exit a leaf's stoma via simple diffusion
c. enter a leaf's xylem by osmosis
d. enter a leaf's stoma via simple diffusion
Most scientists concur that Global Climate Change is an environmental problem caused by
a. changing precipitation patterns and violent storms
b. anthropogenic releases of CO2 and CH4 in the atmosphere
c. the earth's response to the upcoming Ice Age in 2100.
d. increased amounts of SO2 and O3 in the atmosphere
Which of the following interactions describes a relationship in which one organisms resides within another organism - the invader benefits and the host is negatively affected, but not killed.
When a bird eats a worm, about 10% of the potential energy contained in the worm's biomass is used for the bird's metabolism or lost as heat. The remaining 90% will become incorporated into the tissues of the bird.
You are a living organism. Which of the following best describes you?
a. a multicellular, autotrophic eukaryote
b. a unicellular, hetrotrophic prokaryote
c. a unicellular, autotrophic eukaryote
d. a multicellular, heterotrophic eukaryote
All of the following organisms would be classified as photosynthetic autotrophs, EXCEPT
The carbon cycle
a. neither response is correct
b. both responses are correct
c. involves the cell processes of aerobic cellular respiration and photosynthesis
d. involves the cycling of carbon as an inorganic atmospheric gas and as organic biomass
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