MBIO 2370 Lecture 10: Lecture 10 – MBIO 2370

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grayrabbit360

8 Mar 2017

School

University of Manitoba

Department

Microbiology

Course

MBIO 2370

Professor

Dr.Peter Pelka

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Document Summary

Carbohydrate biosynthesis: photosynthesis, formation of carbohydrates from co2 and h2o and using light as an energy source, write formula, production of carbohydrates and o2 as by product, h = plancks constant v = frequency. Photosynthesis vs respiration: photosynthetic cells utilize light energy (hv) to reduce co2 to carbohydrate (reverse oxidation) and oxidize h2o to o2. In this way, organic carbon is produced, and is molecular o2, required for respiration: two processes, respiration and photosynthesis give rise to the carbon cycle in nature. In general: write formula, therefore in plants and green algae, the o in h2o must come from co2, the product o2 must come from the electron donor, thus, two different reactions must be happening. Stage 1 - electrons (on carriers) are generated from the electron donor: write formula. Stage 2 - electrons (from carrier) reduces the co2: write formula, 2 key experiments done to prove this. Identification of hill reagents: use of heavy o2.

Related Questions

1.What is the difference in the end products of photosynthesisin plants purple bacteria,and green-sulfur bacteria?

2.The herbacide atrazine binds to the quinone-binding site ofphotosystem II and blocks the formation of plastoquinon. Whateffect would atrazine have on a) O2production b)ATP productionc)NADPH production

3.Calculate the free energy change for the light dependantreaction of photosynthesis in plants.How many moles of ATP couldtheoretically be synthasized using this energy?

4. Some green sulfur bacteria produce NADH as a result of lightobsorption. This process requires H2S as an electron donor. Write abalanced equation for the light-dependant reactions forphotosynthesis in these bacteria.

i know the light dependant reaction is 2H2O + 2NADP+ + 3ADP +3Pi â O2 + 2NADPH + 3ATP so would you just add H2s onto the reagantside and you will have NADP+ on product side

emeraldturtle618

Microbiology Unit 2 Applied and Environmental Assignment Part 1: Identify Nutritional requirements from Chapter 6&14 (and review from chapters 1 & 2) 1. Determine which of the 4 macromolecules require the following elements: a. Carbon: carbohydrates___ lipids___ proteins___ nucleic acids___ b. Nitrogen: carbohydrates___ lipids___ proteins___ nucleic acids___ c. Sulfur: carbohydrates___ lipids___ proteins___ nucleic acids___ 2. The essential elements mentioned above are cycled through cells and the earth in biogeochemical cycles (the carbon, nitrogen, and sulfur cycles.)Select the correct answer or fill in the blanks to summarize these cycles: a. Carbon dioxide is taken in from the atmosphere by [autotrophs/heterotrophs] and converted to glucose through carbon ________________. When heterotrophs eat autotrophs they use catabolism to break down glucose to make ATP and waste carbon is released as ___________. b. There is plenty of nitrogen available in the atmosphere but it is not accessible to organisms because it is in the form of Nitrogen gas (N2). N2 is fixed by [bacteria/plants/animals] and converted to ammonia (NH3.) NH3 can be used by [bacteria/plants/animals] to build their cells. Next, by consuming food with amino acids,[bacteria/plants/animals] can get access to nitrogen for their own cellular needs. c. There is also a good quantity of sulfur in dirt, rocks, and the atmosphere. Sulfur cycles between H2S => S0 => SO4 => SH groups in Proteins => back to H2S.Using _________________ respiration, anoxygenic photosynthesis, and chemolithoautotrophy [bacteria/plants/animals]convert H2S and S0 to SO4 which is taken in by [bacteria/plants/animals] and used to build their cells. When [bacteria/plants/animals]eat plants they take in essential amino acids containing sulfur and recycle these to make their proteins. d. _________________ break down waste and dead organisms and recycle nutrients back into the cycles. *The C and N are summarized here: https://youtu.be/2D7hZpIYlCA and https://youtu.be/leHy-Y_8nRs 3. Match the main metabolic classifications to the description: Classifications: photoautotroph/ photoheterotroph/ chemoautotroph/ chemoheterotroph o A microbe that makes its own food by taking carbon from CO2 in the atmosphere and its energy from sunlight o A microbe that makes its own food by taking carbon from CO2 in the atmosphere and its energy from reduced inorganic chemicals o A microbe that eats other organisms to get organic carbon and energy o A microbe that eats other organisms to get organic carbon but gets energy from sunlight 4. Identify the phases of the bacterial growth curve and define what occurs in each phase Phase A = ______________ Definition: Phase B = ______________ Definition: Phase C = ______________ Definition: Phase D = ______________ Definition: Part 2: Unique ecosystems containing microbes 5. Watch the video that shows hydrothermal vents: https://youtu.be/RO3nO98gH_M a. Describe bacteria that live at the vents using terms from the unit 2 reading guide: ________________________________________________________________________ b. Write a 2-3 sentence reflection about hydrothermal vents and the contribution of microbes to this ecosystem: 6. Apply what you have learned to the TED-Ed video about Biofilms: https://youtu.be/pHLP5CZMnL4 a. Give the terms for cell structures mentioned in the video that we learned in Chapter 4 and 7: i. âsticky appendagesâ thatallows bacteria to attach and begin the biofilm: _______________ ii. Extracellular matrix/gooey matrix that holds cells together: ____________________________ iii. Exchange genetic information while packed together: ____________________________ iv. Communicate with each other by _________________________________________ sensing. v. Produce chemical to kill microbial competitors: ____________________________ factor.

MBIO 2370 Lecture 10: Lecture 10 – MBIO 2370

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