BI110 Lecture Notes - Lecture 3: Sucrose, Cellular Respiration, Chemosynthesis

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ceruleanlion382

29 Apr 2016

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Document Summary

Absorption of light by chlorophyll is the most relevant. Electrons want to be in their most stable state which is the lowest state. Red photons excite electrons to a higher energy state, blue photons excite electrons at an even higher. The amount of nrg in red photons have the right amount of nrg to promote an electron to state 1 (longer wavelength) Blue photons have more energy than red so it can promote it to the higher energy state (shorter wavelength, therefore, more nrg) Chlorophyll is green because the amount of nrg in green photons does not match any nrg states that electrons in that object has, so it is reflected. Light is the primary source of nrg for all life on earth and it is because of photosynthesis that captures all this nrg for all life on earth. Series of nrg transformations that take place in photosynthesis. Plants capture sunlight and transform it into chemical energy through photosynthesis.

Related Questions

Chlorophyll is a pigment that absorbs specific wavelengths of light, and the absorption of that light leads to the passage of electrons to a higher energy state, where chemical energy can then be harvested from them. You would expect that a plant exposed to which color of light would produce the most photosynthesis?

Which color of light would you expect chlorophyll to absorb the least?

Most plants are green because....

chlorophyll absorbs green light well

chlorophyll does not absorb green light well

chlorophyll reflects green light well

both of the last two answers are correct

Thinking about the gases involved in respiration and photosynthesis, during the day, a plant is producing____ from respiration and releasing_____ from photosynthesis. But at night, a plant is only producing_______ from respiration.(spell your answers out completely).

Plants perform cellular respiration to produce.......

Which of the following is true about plants and cellular respiration?

plants perform cellular respiration only during the night

plants perform cellular respiration only during the day

plants perform cellular respiration during the night and day

plants do not perform cellular respiration

Which of the following is true regarding plants and photosynthesis?

plants perform photosynthesis only during the night

plants perform photosynthesis only during the day

plants perform photosynthesis during the night and day

plants do not perform photosynthesis

Is it possible for this plant to consistently do more cellular respiration than photosynthesis?

yes, plants use excess ATP for growth

yes, but only during winter months

not today, but fossil records shows they did in the past

no, plants can't consume food faster than they make it

5: chloroplast kept in the dark can continue to make sugar is provided with

A: NADPH, CO2, and ADP

B: CO2, and ATP

C: NADPH, ATP, and CO2

D: NADPH and ATP

E: water and ATP

7: C3 plants are more susceptible to photorespiration than either C4 or CAM plants. Why do most plants lack the C4 pathway??

A: Switching between C3, C4, and CAM photosynthesis is very difficult for most plants

B: ?Rubisco is more efficient in C3 plants when compared to rubisco of C4 and CAM plants

C: Most plant species do not have vacuoles in their cells to store the malate generated from CO2 taken in during the night.

D; : Photorespiration is not a serious problem for most plants.?

E: There is an energetic cost to C4 and CAM pathways that only makes them advantageous in very hot and/or arid environments.?

8: In Engelmann's classic experiment, why were the oxygen-requiring bacteria clustered around the regions of Spirogyra algae that were bathed in red, blue, and violet light?

A; The bacteria were immobile and that is where Engelmann happened to place them

.?B; The most energy-rich wavelengths of light are found at the edges of visible and nonvisible light (ultra

violet and infrared)

C; Photosynthesis is most active in those wavelengths of light and thus more oxygen is consumed by the algae in those regions.

D: Photosynthesis is most active in those wavelengths of light and thus more oxygen is produced by the algae in those regions.?

E: : Chlorophyll is green and thus reflects green light.

9: In any experiment, changes to the dependent variable based on the manipulations of the independent variable are measured. When determining the action spectrum of a given plant, what is the independent variable and what is the dependent variable?

A: independent = rate of O2 release in photosynthesis; dependent = wavelength?

B: ?independent = absorption of light; dependent = wavelength

C: independent = wavelength; dependent = rate of O2 release in photosynthesis?

D: independent = wavelength; dependent = absorption of light?

E: independent = rate of O2 release in photosynthesis; dependent = absorption of light

11: In order to elucidate the Calvin cycle, Calvin and his colleagues used two-dimensional paper chromatography to analyze the presence of different molecules under different conditions. What did they conclude from the accumulation of RuBP when CO2 levels were low??

A: CO2 serves as a non-competitive inhibitor of rubisco.

B: RuBP is the last substrate to react in the Calvin cycle.

C: RuBP only reacts with CO2 when concentrations of ATP are low

D: RuBP is the first substrate to react with CO2

E: RuBP only reacts with CO2 in the sunlight

12: Why isn't oxygen produced by organisms that perform anoxygenic photosynthesis?

A; their membranes lack ATP synthase?

B; They use a different enzyme for the initial reactions of the calvin cycle

C: they use electrons donors other than water

D: their photosystem do not utilize the calvin cycle

E: their chorophyll contains an iron rather than magnesium

tanelk218

Review question its 1-12 sorry for the xtra questions in the bottom

1:2D chromatography is so named because ____

A: there are two steps: labeling with a radioactive marker and separation via chromatography

B: two different solutions are used in the paper chromatography

C: the molecules are separated into a linear arrangement, meaning two dimension

D: two different types of radioactive markers must be used

E: the process separates the molecules in two direction, first along the X and then along the Y axis

2: :Which molecule(s) regulate(s) photosynthesis by sensing the metabolic status of the chloroplast and regulating proton flow out of the thylakoid lumen??

A: ATP synthase

B: antenna complex

C: Chrolophyll B

D: carotenoids

E: chlorphyll A

3: When does A CAM plant take in atmospheric CO2?

A: daytime only

B: Summer day

C: winter day

D: nighttime only

E: anytime the calvin cycle is happening

4: Where can you find ATP synthase in a plant cell ?
A; in the thylakoid membrane only

B: in the mitochondial inner membrane

C: both thylakid and inner mitochondria membrane

D: only in the nucleus

E: embedded in the plasma membrane

5: chloroplast kept in the daek can continue to make sugar is provided with