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BIOL 110 Lab Practical #2 Sample Questions
Terms in this set (16)
How do you determine the absorption spectrum of a substance?
Measuring the substance's absorbance over a range of different wavelengths of light
What best characterizes the rate of population growth?
The slope of the population size versus time graph at any point in time
Which type of population growth is the rate of growth INDEPENDENT of population size?
What best characterizes exponential growth?
The slope of the population size VERSUS time graph is proportional to population size
What may be found in/on the thylakoid membrane?
Photosystem II and ATP synthase
What inputs are involved in oxygenic photosynthesis?
carbon dioxide & water
The light-DEPENDENT reactions of photosynthesis generate what?
NADPH (NADP+ gains electrons during the light-dependent reactions and becomes NADPH)
What is the principal function of photosystems in photosynthesis?
absorb photons from the environment
What is the principal conclusion of Priestly's experiments with plants & the composition of the air?
Plants add something to the air that can support animal life
Which has more energy: a 400 nm photon or a 740 nm photon?
A 400 nm photon (shorter wavelength = more energy)
T/F: Chlorophyll a is the only photosynthetic pigment that can convert light energy into chemical energy.
What is the purpose of pigments chlorophyll b and carotenoids?
they both absorb light at wavelengths beyond what chlorophyll a can absorb, thus plants harvest more light energy when using the additional pigments
Within a photosystem, what is true concerning antenna chlorophyll and reaction center chlorophyll?
- in a photosystem, there are hundreds of antenna chlorophylls but only one (or just a few) reaction center chlorophylls
- the reaction center chlorophyll may become oxidized when it absorbs sufficient energy
What is the primary function of the b5f complex in chloroplasts?
pumps protons into the thylakoid space
What is the function of ATP synthase in chloroplasts?
allows protons to flow from the thylakoid space to the stroma.
What occurs during the Calvin Cycle?
RuBP accepts carbon dioxide from the air (carbon fixation)
PGA is reduced to G3P, using NADPH as an electron source
RuBP is regenerated
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