BIOC202 Tutorial 3 Practice Questions w Answers
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BIOC202 Tutorial 3 | Elyn Rowe | 2024 Dr. Williams has suggested that we spend a bit of time going through some practice midterm questions in more depth, and has provided a relevant textbook question to look at. I’ve slightly changed the short answer questions pulled from the midterm so you have to do a bit more thinking than opening up the answer key PDF.
Modified Q3 from Practice Midterm 1. Biochemists often use a helix wheel to visualize placement of amino acids (
αα
) in an α
-
helix. In a helix wheel, #1 corresponds to the first αα
in the sequence, #2, the second, etc. etc. The sequence listed below forms an α
-helix. Using the helix wheel provided, analyze this sequence and comment on its specific properties. SWLS NHVI QAMA EIDK NF
BIOC202 Tutorial 3 | Elyn Rowe | 2024 Modified Q4 from Practice Midterm 2a. Draw an anti-parallel β
-sheet composed of two β
-strands with each strand being 4 residues long. Just draw the backbone (i.e. do NOT draw R groups) and indicate any hydrogen bonds. How would the hydrogen bonding pattern in a parallel β
-sheet be different?
2b. Relative to the β
-sheet you drew in 4a, describe the orientation of the R groups in the sheet relative to the plane of the exam page.
BIOC202 Tutorial 3 | Elyn Rowe | 2024 The Final Boss Lehninger, Chapter 4 Q4 3. Effect of pH on the conformation of
-
helical secondary structures: Specific rotation is a measure of a solution’s capacity to rotate circularly polarized light. The unfolding of the
-
helix of a polypeptide to a randomly coiled conformation is accompanied by a large decrease in specific rotation. Polyglutamate, a polypeptide made up of only L-Glu residues, is an
-helix at pH 3. When the pH is raised to 7, there is a large decrease in specific rotation of the solution. Similarly, polylysine (L-Lys residues) is an
-helix at pH 10, but at pH 7 its specific rotation also decreases. Explain the effect of the pH changes on the conformations of poly(Glu) and poly(Lys). Why does this transition occur over such a narrow range of pH?
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The angle of the water molecule (H₂O) is
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100 degrees
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Please upload your full solution to the following problem.
For the experimental isotherm data given below, determine the Freundlich and Langmuir isotherm
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for this purpose. Which of the two isotherms better describes the data?
Experimental data:
Carbon type: F-400
Carbon size: 200 × 400
. Chemical: Trichloroethene, C₂HCl3 (131.39 g/mol)
Temperature: 13 C
pH: 7.5-8
Equilibrium time: 31 days
●
Ⓡ
B
B
Sample
number
123456
TCE Liquid-Phase
Concentration
CA. μmol/L
23.6
6.67
3.26
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Time (sec)
PH
[RX]
[H30+]
Ln[RX]
0.000
7.000
0.00002344
0.0000001
-10.6610666
15.000
6.400
0.00001954
0.00000039
-10.8430469
30.000
5.410
0.00001955
0.00000389
-10.8425353
45.000
5.230
0.00001756
0.00000588
-10.94988696
60.000
5.070
0.00001493
0.00000851
-11.11213794
75.000
4.920
0.00001142
0.00001202
-11.3801444
90.000
4.840
0.00000899
0.00001445
-11.6193977
105.000
| 4.780
0.00000685
0.00001659
-11.8912619
120.000
4.750
0.00000566
0.00001778
-12.08208666
135.000
4.720
0.00000439
0.00001905
-12.33618133
150.000
4.700
0.00000349
0.00001995
-12.56569882
165.000
4.670
0.00000207
0.00002137
-13.08796195
180.000
4.670
0.00000207
0.00002137
-13.08796195
195.000
4.660
0.00000157
0.00002187
-13.3644349
210.000
4.650
0.00000061
0.00002283
-14.30980687
225.000
4.650
0.00000061
0.00002283
-14.30980687
240.000
4.640
0.00000061
0.0000229
-14.30980687
255.000
4.640
0.00000061
0.0000229
-14.30980687
270.000
4.640
0.00000061
0.0000229
-14.30980687
285.000
4.630
0.00002344
Undefined
300.000
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Time (sec)
pH
[RX]
[H30+]
Ln[RX]
0.000
7.000
0.00002344
0.0000001
-10.6610666
15.000
6.400
0.00001954
0.00000039
-10.8430469
30.000
5.410
0.00001955
0.00000389
-10.8425353
45.000
5.230
0.00001756
0.00000588
-10.94988696
60.000
5.070
0.00001493
0.00000851
-11.11213794
75.000
4.920
0.00001142
0.00001202
-11.3801444
90.000
4.840
0.00000899
0.00001445
-11.6193977
105.000
| 4.780
0.00000685
0.00001659
-11.8912619
120.000
4.750
0.00000566
0.00001778
-12.08208666
135.000
4.720
0.00000439
0.00001905
-12.33618133
150.000
4.700
0.00000349
0.00001995
-12.56569882
165.000
4.670
0.00000207
0.00002137
-13.08796195
180.000
4.670
0.00000207
0.00002137
-13.08796195
195.000
4.660
0.00000157
0.00002187
-13.3644349
210.000
4.650
0.00000061
0.00002283
-14.30980687
225.000
4.650
0.00000061
0.00002283
-14.30980687
240.000
4.640
0.00000061
0.0000229
-14.30980687
255.000
4.640
0.00000061
0.0000229
-14.30980687
270.000
4.640
0.00000061
0.0000229
-14.30980687
285.000
4.630
0.00002344
Undefined
300.000
| 4.630…
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need help please and thanks dont understand only need help with C-F
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CH2OH
CH2OH
CH,OH
CH2OH
он
он
OH
H.
OH
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OH
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Mastery Assess It 7
PAP Chemistry-2903012-42100P-1/ Stoichiometry/Lesson 107
12. The combustion of glucose is represented by the following balanced equation: CGH12O6+6 0, 6 H20+6CO2.
Which reactant is the limiting reagent if there is 1 gram of both 0, Hy06 and 0,7
O a. CgHy06
O b. H20
O c. 0,
Od. CO,
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- This module discusses the characteristics of carbohydrates, fats, and proteins. Enzymes are a special class of proteins that perform a wide variety of functions essential for the well-being of a living organism. In humans, a class of enzymes, which is of particular interest, are the liver enzymes. They break down all toxins encountered by humans. Research and describe the underlying causes for the elevated levels of any one of the liver enzymes described in a liver function test.Ask ONE (1) clarifying question about a topic you find difficult or want to learn more about from the concepts introduced in this module.In your response to your peer’s posts, locate a resource that may help address the clarifying question regarding the genetic topic in the initial post.arrow_forwardrsity o... ingsbo... kboard... ARED4 ethod? 7... F2 Remaining Time: 1 hour, 22 minutes, 23 seconds. Question Completion Status: A Moving to the next question prevents changes to this answer. Question 1 # The angle of the water molecule (H₂O) is 180 degrees 120 degrees 100 degrees 90 degrees 109 degree A Moving to the next question prevents changes to this answer. MAR 14 80 F3 SA $ 000 F4 tv % F5 NA MacBook Air 22 F6 ∞r F7 45.113arrow_forwardplease solve part a and b explaining why is it that way. show your work on a piece of paper please.arrow_forward
- to Johnston Commun X Rh Blackboard Collaborate Ultra - x > General Psychology-Fall 2021 A ALEKS - Griffin Barden - Learn + A www-awa.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IJczzdcvSCzsqTCIDqNGV3bKqhMfPmUcQ4ENkmiXn9QCwgeDPDkQ06yszYWESPcekwLO-Qg619rekU7404HgFAGbEZa Dr080?1 oBw7QYjlbavbSPXtx-YCjsh_7mMmrq#item O THERMOCHEMISTRY Griffin Calculating a molar heat of reaction from formation enthalpies Using the table of standard formation enthalpies that you'll find under the ALEKS Data tab, calculate the reaction enthalpy of this reaction under standard conditions: 2C,H;(g)+70,(9)→4 CO,(g)+6H,O() Round your answer to the nearest kJ.arrow_forward☐ 5:41 PM Sat Jun 29 kennesaw.view.usg.edu Name: Lab Section (Day & Time): 3361L Molecular Modeling and Stereochemistry Worksheet CHEM Ground Rules: 1. You are required to build models for various tasks presented in this exercise. Molecular modeling programs are not a substitute for 3-D hand-held molecular models. 2. You will be prompted to include a snapshot of your model with each task at the end of this worksheet. Read the question carefully to construct and orient the models appropriately. Use your smartphone to take a picture of the model you build, and insert it at the end of the handout with corresponding prompts. You will not get any credit for this assignment without correct snapshots of the models you build. 3. Hand-write your responses for each task and insert the snapshots for various models at the end of this docuent. Save the entire assignment as a single PDF. A consolidated PDF of the completed assignment (including relevant snapshots of your models should be submitted…arrow_forwardMyCSU-Columbus State Univers X M Inbox (1) - bailes_amber@colum X D2L Quiz 1- Intro Resrch Meth in CJ K ← → CO 03 Email MGmail X A ALEKS-Amber Bailes - Learn X + www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IJgXZp57itWHhRgilODc5MqvhZbKYx2-U-03700TYd4ABbH6KAJLiK5JfbHdk1X12WQ... LE YouTube Maps MyCSU-Columbus... B Homepage - Georg... Microsoft Office Ho... BLesson 2 Discussion... III MyMidland Mortga... CHEMICAL REACTIONS Solving for a reactant using a chemical equation 3/5 Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water (H₂O) and carbon dioxide (CO₂) chemically react to form the simple sugar glucose (C6H₁2O6) and oxygen gas (0₂). 12 What mass of carbon dioxide is consumed by the reaction of 3.6 g of water? Be sure your answer has the correct number of significant digits. g x10 Ś ? Explanation Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Ce 78°F O Et C ||| Check Type here to search X a no…arrow_forward
- We are stuck on 9. We get how Q is 16 and rxn goes left. at eq 2+ x. 2 + x. -2 x We get x= 1. Therefore k = 4. Please help us. Questin 9. See conditions from 8 This is not a graded question as it is a practice question . I am 60 years old and helping my son prepare for the AP exam in a few months. We do questions at the back of the textbook by Zumdahl and Zumdahlarrow_forwardPlease upload your full solution to the following problem. For the experimental isotherm data given below, determine the Freundlich and Langmuir isotherm parameters. Apply linear regression to determine the isotherm parameters. A spreadsheet can be used for this purpose. Which of the two isotherms better describes the data? Experimental data: Carbon type: F-400 Carbon size: 200 × 400 . Chemical: Trichloroethene, C₂HCl3 (131.39 g/mol) Temperature: 13 C pH: 7.5-8 Equilibrium time: 31 days ● Ⓡ B B Sample number 123456 TCE Liquid-Phase Concentration CA. μmol/L 23.6 6.67 3.26 0.322 0.169 0.114 TCE Adsorbent-Phase Concentration 9A, μmol/g 737 450 318 121 85.2 75.8 2arrow_forwardI need your help plzarrow_forward
- How would you do part C, please show all your work on a piece of paper and explain why is like that.arrow_forwardon Commun x Bb Courses- Blackboard Learn > General Psychology-Fall 2021 - x A ALEKS - Griffin Barden - Learn ww-awa.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IJcZZdcvSCzsqTCIDqNGV3bKqhMfPmUcQ4ENkmiXn9QCwgeDPDkQ06yszYWEsPcekwL0-Qg619rekU7404HgFAGbEZaDr080?1oBw7QYjlbavbSPXtx-YCjsh_7mMm O THERMOCHEMISTRY Griffin Calculating specific heat capacity A chemist carefully measures the amount of heat needed to raise the temperature of a 860.0 g sample of a pure substance from 14.8 °C to 22.4 °C. The experiment shows that 4.6 kJ of heat are needed. What can the chemist report for the specific heat capacity of the substance? Round your answer to 2 significant digits. -1 - 1 x10 J'g K X.arrow_forwardPlease don't provide handwritten solution ....arrow_forward
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