Problem Set 1 Graded
Student
ERIC XIAO
Total Points
pts
Question 1
Q1 name pt
− 0 pts Correct
Question 2
Q2 uNID pt
− 0 pts Correct
− 1 pt Click here to replace this description.
Question 3
Microscope 1 pts
− 0 pts Correct
− 2 pts Incorrect, the correct answer is F
Question 4
Microscope 2 pts
− 0 pts Correct
− 2 pts Incorrect, the correct answer is B
Question 5
Microscope 3 pts
− 0 pts Correct
− 2 pts Incorrect, the correct answer is D
Question 6
Microscope 4 pts
− 0 pts Correct
− 2 pts Incorrect, the correct answer is E
, Question 7
Why do we need EM Resolved pts
− 0 pts Correct
− 2 pts Partially correct, full credit required an explanation that stated that the wavelength of light is too large to
resolve small structures; we need electrons to do this.
− 4 pts Incorrect, we were looking for an explanation that stated that the wavelength of light is too large to
resolve small structures; we need electrons to do this.
− 0 pts Click here to replace this description.
Regrade Request Submitted on: Sep 06
We need electron microscopes to see better is correct, but we use it to see the structures
and further understand the functions, which is another reason why we use electron
microscope instead of light microscope. My answer wasn't wrong it was just a different
explanation.
While the end goal is understanding structure and function, there are other ways this can
be accomplished (such as x-ray crystallography). The use of electron microscopes
specifically is to overcome the wavelength limitations of visible light. Partial credit would
have been earned in recognizing that single molecules/protein complexes are especially
small. Full credit would explain how the wavelength of visible light fails to image that
scale. Grading stands.
Reviewed on: Sep 06
Question 8
Amino acid structure Resolved pts
− 0 pts Correct
− 1 pt Peptide bonds are incorrectly labeled
− 2 pts N and C termini are incorrectly labeled
− 2 pts amino acids structures are incorrect
− 2 pts Termini should be charged at neutral pH
− 4 pts Missing 1 amino acid entirely
− 7 pts Missing multiple amino acids / no answer
Regrade Request Submitted on: Sep 06
On page 26 of lecture 6, the termini was not charged with NH2 and COOH on the amino
and carboxyl termini.
The question specifies neutral pH which means the termini will be charged. Grading
stands.
Reviewed on: Sep 09
Student
ERIC XIAO
Total Points
pts
Question 1
Q1 name pt
− 0 pts Correct
Question 2
Q2 uNID pt
− 0 pts Correct
− 1 pt Click here to replace this description.
Question 3
Microscope 1 pts
− 0 pts Correct
− 2 pts Incorrect, the correct answer is F
Question 4
Microscope 2 pts
− 0 pts Correct
− 2 pts Incorrect, the correct answer is B
Question 5
Microscope 3 pts
− 0 pts Correct
− 2 pts Incorrect, the correct answer is D
Question 6
Microscope 4 pts
− 0 pts Correct
− 2 pts Incorrect, the correct answer is E
, Question 7
Why do we need EM Resolved pts
− 0 pts Correct
− 2 pts Partially correct, full credit required an explanation that stated that the wavelength of light is too large to
resolve small structures; we need electrons to do this.
− 4 pts Incorrect, we were looking for an explanation that stated that the wavelength of light is too large to
resolve small structures; we need electrons to do this.
− 0 pts Click here to replace this description.
Regrade Request Submitted on: Sep 06
We need electron microscopes to see better is correct, but we use it to see the structures
and further understand the functions, which is another reason why we use electron
microscope instead of light microscope. My answer wasn't wrong it was just a different
explanation.
While the end goal is understanding structure and function, there are other ways this can
be accomplished (such as x-ray crystallography). The use of electron microscopes
specifically is to overcome the wavelength limitations of visible light. Partial credit would
have been earned in recognizing that single molecules/protein complexes are especially
small. Full credit would explain how the wavelength of visible light fails to image that
scale. Grading stands.
Reviewed on: Sep 06
Question 8
Amino acid structure Resolved pts
− 0 pts Correct
− 1 pt Peptide bonds are incorrectly labeled
− 2 pts N and C termini are incorrectly labeled
− 2 pts amino acids structures are incorrect
− 2 pts Termini should be charged at neutral pH
− 4 pts Missing 1 amino acid entirely
− 7 pts Missing multiple amino acids / no answer
Regrade Request Submitted on: Sep 06
On page 26 of lecture 6, the termini was not charged with NH2 and COOH on the amino
and carboxyl termini.
The question specifies neutral pH which means the termini will be charged. Grading
stands.
Reviewed on: Sep 09
