1.I was looking at my notes on protein structure and I am trying to understand quaternary structures for proteins.
I understand that primary, secondary, and tertiary structures are encoded by one gene each. However, I am not entirely sure if quaternary structures are encoded by one or multiple different genes.
The reasons why I am a little confused is for two reasons. Firstly, quaternary structures are made up of more than one protein subunit (i.e. multiple polypeptides). Secondly, as I understand, Hemoglobin, for example, has different subunits, each of which is encoded by a different gene. Does this necessarily mean that all quaternary structures are composed of proteins encoded from different, separate genes?
If quaternary subunits are encoded by different, separate genes, can those different genes be located on different loci, or are all of the subunits necessarily encoded by the different gene but its mRNA molecule is spliced differently?
3.You will be assembling 4 expressions using order of operations. The trick to this project is that you’ll be
ou’ll be using the same 4 numbers written in the same order. The only thing that will change in each expression will be the tools you’ll use from your toolbox. The tools that you’ve learned so far for order of operations are parentheses, exponents, multiplying, dividing, adding, and subtracting.
Here are the four numbers. Keep them in this order:
18 2 4 3
Here are the tools in your toolbox:
The 2 and 3 represent exponents, so you are allowed to square or cube a number.
Listed below are the values you need to create.
4.ou really like the fact that your GPS gets you to your friend’s house and typically not 3
down from where you want to be. That means your GPS has to be precise.
Really precise. It relies on atomic clocks on-board the satellites. These clocks are
precise to the nanosecond scale. Your phone accessing the GPS signal is the Earth based
observer. Do you expect the atomic clock to run slower or faster than the clock on your
phone? Is the time on the atomic clock the proper time or dilated time? Is the time on
your phone the proper time or dilated time?
5.Module 6 – Mid-Term Question
Tanya is 45 years of age and her 2020 income is made up of employment income
t income of $93,500 and she contributed $9,800 to her Registered Retirement Savings Plan. (Assuming she has the RRSP contribution room from working in 2019). She was awarded a year-end bonus of $10,000, all of which was payable in February 2021. [The bonus was received on February 10, 2021 – consider if the bonus should be included in employment income in 2020 or 2021 (cash or accrual basis)].
For 2020, her employer withheld maximum CPP ($2,898) and EI ($856) contributions.
Tanya lived with her family in Lethbridge, Alberta. Other information pertaining to 2020 is as follows:
Tanya’s spouse is 47 years old and his employment income for the year totaled $45,500.
Bob and Tanya have a daughter, Tammy, who is 3years old in 2020. Tammy was taken care of while Bob and Tanya worked during 2020 by Bob’s mother who is currently unemployed and retired.
The family’s medical expenses for the year, all of which were paid by Bob, totaled $3,355. Of this amount, $300 was reimbursed by Tanya’s employer.
During the year, Tanya made cash donations to registered Canadian charities in the amount of $3,500 and Bob made $200. (Consider whether Bob will have higher donation credit if he transferred the $200 donation credit to Tanya or if he should use the credit on his return)
During the year, Bob made contributions to federal political parties totaling $1,150.
Both Tanya and Bob earned rent income from their house basement rented out during 2020. The details of the rent activities are as follows:
Rent income $7,500
Repairs (Bathroom and Kitchen) $1,080
Utilities (100% for the basement) $1,320
Advertising the basement $150
No Capital Cost Allowance is planned as they would like to maintain the entire house as a principal residence in the future. The net rental income will be shared jointly (50%) on their tax return in 2020.
Required: Use the above information to determine Tanya and Bob’s
Net income for tax purposes
Federal tax payable before tax credit (Gross tax)
Tax credits available
Federal tax payable for 2020. (Do not consider provincial tax payable)
Federal Tax Bracket
Tax Bracket 2020 Tax Rate 2020 Tax Bracket 2021 Tax Rate 2021
Up to $48,535 15% Up to $49,020 15%
$48,536 to $97,069 20.50% $49,021 to $98,040 20.50%
$97,070 to $150,473 26% $98,041 to $151,978 26%
$150,474 to $214,368 29% $151,979 to $216,511 29%
$214,369 and over 33% $216,512 and over 33%
6.Write a Slicer
One of the key steps in processing an STL file for printing is slicing. STL files were written
s were written to make slicing a low memory task by storing each triangle at a single place.
We already have code to do the following:
A Generator that returns a triangle one at a time from an STL file (specifically an ASCII STL file). It Return the triangle as a list of 3D points (tuples), ignoring the normal. (from HW4)
A function that takes a list of line segments, each line segment is a list of 2D points (tuples) and returns a single list of 2D points where the start of one segment is the end of another. ( from HW 3)
A function that converts a list of 2D points to G-Code (lab 2)
A function that writes GCode to a file
To make a slicer you need to:
Write a function that calculates the intersection of a triangle with a horizontal plane. The input of the function should be a list of 3D points (tuples). It should return a list of 3D points. See this website for hints on the mathematics http://geomalgorithms.com/a06-_intersect-2.html#Triangle-Plane (Links to an external site.)
( https://web.archive.org/web/20180706054857/http://geomalgorithms.com/a06-_intersect-2.html (Links to an external site.) )
Next you need to combine all of these different functions into a single workflow that takes in an STL file, a slicing height, print temperatures, movement speed , and extrusion speed and returns a G-code String which prints the walls of the STL file. It should have an outer iteration over slice heights of the STL, for each slice height, it should scan all triangles and make a list of the line segments that intersect the plane at that Z height. Then it should order those segments into a list of points. That list of points is then converted into gcode movement and extrusion commands. The entire system combines these slices with setup and shutdown Gcode for the ender 3 printer to make the print job. You may write to a file a layer at a time or at the end.
Once the slicer is done:
Run the previous function with a vase file such as one of the following files:
Submit your code as a Jupiter notebook with the .gcode in it and, and an image of your print.