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Module 4 Exam - Requires Respondus LockDown
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Due No due date Points 100 Questions 30 Time Limit 120 Minutes
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Before moving forward , make sure that only the following items are on your desk: your computer (keyboard and mouse) 1-2 pieces of blank scratch paper (no notebooks) a pen/pencil a calculator (no cell phones) lab notebook/printout for lab exams only (for courses with a lab component) During this exam, you shouldn't access other resources (a phone, tablet, notes, books, etc.) or communicate with other people. Please stay in your seat and focus on the computer screen until the exam is complete. If an interruption occurs, briefly explain what happened by speaking directly to your webcam. And, finally, remember that you cannot exit the exam until all questions are completed and the exam has been submitted for grading. Environment Check: Make sure the area around your computer is clear of papers, books, phones, etc. The room should be well lit while avoiding backlighting such as sitting with a window or lamp behind you. Click "Start Recording" and slowly move the camera in a complete circle to show a 360 view of your room. You must show your ENTIRE work surface (desk/table/bed), your empty chair, and beneath your desk and chair. Be sure to also show the front and back of all objects on your work surface including but not limited to your scratch paper and calculator. Click "Stop Recording" when finished
Attempt Time Score LATEST Attempt 1 37 minutes 89.5 out of 100 Score for this quiz: 89.5 out of 100 Submitted Jun 7 at 3:55pm This attempt took 37 minutes. Question 1^3 / 3^ pts Which of the following monosaccharides is not an aldose? Erythrose Correct!Correct! Dihydroxyacetone Glucose Glyceraldehyde Ribose Question 2^3 / 3^ pts When two monosaccharides are epimers: Correct!Correct! They differ only in the configuration about one carbon atom One is a furanose, the other a pyranose One is an aldose, the other a ketose They can form ring structures
An epimer is formed An aldose is formed Question 5^3 / 3^ pts Amylose and amylopectin are both polymers of: A) -D-glucose B) -D-glucose C) Galactose D) Idose E) Maltose Correct!Correct! A B C D E Question 6^0 / 3^ pts Which statement about starch and glycogen is false? A) Both have -D-glucose monomers B) Both starch and glycogen are energy storage polysaccharides C) Both are homopolymers of glucose
D) Glycogen is more extensively branched than starch E) Both have O-glycosidic linkages orrect Answerorrect Answer A B ou Answeredou Answered C D E Question 7^0 / 3^ pts Which monosaccharide is not a five-carbon monosaccharide? ou Answeredou Answered Ribose Lyxose Xylose orrect Answerorrect Answer Erythrose Arabinose Question 8^3 / 3^ pts The two monosaccharides shown below could best be described as:
Correct!Correct! A B C D E Question 10^3 / 3^ pts Based on the form of the cyclic sugar below in a Haworth projection, which Fischer projection formula could have formed this structure? A Correct!Correct! B C
D E Question 11^3 / 3^ pts The following monosaccharides are covalently bonded. What type of bond unites them? A) 1 4 B) 1 4 C) 1, 4 D) 1 6 E) 1 6 A B C
Question 14^3 / 3^ pts The organic molecule that is produced abundantly by photosynthesis is ________. Ribose Correct!Correct! Glucose Cellulose Chitin Sucrose Question 15^3 / 3^ pts The “D” in the D-carbohydrates stands for: 3-dimensional Correct!Correct! Dextrorotatory Derivative Design Double Question 16^3 / 3^ pts
Which compound does not fit the formal definition of a carbohydrate? A. C H O B. C H O C. C H O D. C H O E. C H O 6 12 6 9 18 9 3 6 3 8 14 8 5 10 5 A B C Correct!Correct! D E Question 17^3 / 3^ pts Which letter represents the hemiacetal bond? Correct!Correct! A
D E Question 19^3 / 3^ pts Table sugar is also known as: Correct!Correct! Sucrose Dextrose Glucose Galactose Glycogen Question 20^3 / 3^ pts Glycogen has 1 6 branching about every ________ residues. 1 to 10 Correct!Correct! 8 to 12 10 to 30 24 to 30 No branching
Question 21^3 / 3^ pts What element besides C, H, and O is found in the chitin? Br Correct!Correct! N P S Cl Question 22^3 / 3^ pts Amylose folds into which of the following structures? A) eta-sheet B) -turn C) -helix D) D-configuration E) form A B C Correct!Correct!
Structure Energy storage Correct!Correct! Enzyme structure Both A and B Both A and C Question 25^3 / 3^ pts The word saccharide means ___________. Correct!Correct! Sugar Carbohydrate Energy molecule Sucrose Starch Question 26^ 2.5^ / 5^ pts (Short response) Table sugar dissolves easily in water. Given its structure, explain why this is.
Your Answer: Given table sugar's structure, it is able to easily dissolve in water due to its ability to reduce the carbon linkages and break down into water molecules. Sucrose contains -OH groups which can form hydrogen bonds with water. These non-covalent interactions permit solubility by permitting carbohydrates to interact with water and become an aqueous solution. via the -OH bond Question 27^3 / 5^ pts (Short response) In the following structure:
Question 29^5 / 5^ pts Your Answer: (Short response) How are oligosaccharides and polysaccharides similar in their structure? How are they different? Both oligosaccharides and polysaccharides are similar in their structure by makeup of monosaccharides. They are different in that polysaccharides are more like complex carbohydrates such that their structure includes so many polymers that contain many branched macromolecules. Oligosaccharaides are smaller and less complex, they contain anywhere from 3-10 monosaccharides. An oligosaccharide is a polymer of 2 to 20 monosaccharides joined together. A polysaccharide is more than 20 monosaccharides joined together. They are typically linked together by the same 1 4 linkages practically, and there are usually thousands of monosaccharides in a polysaccharide. In addition, polysaccharides can have branches in the structure, which permits them to form large complexes. In contrast, most oligosaccharides do not have branching. Question 30^5 / 5^ pts (Short response) A) Which carbon in the following molecule determines if the molecule is D or L? Indicate the letter corresponding the correct carbon (“A”, “B”, etc.) and explain. B) Is this molecule D or L?
Your Answer: On the above molecule, the penultamite carbon is located at "E", and determines the molecule is D. This is due to the -OH being on the right side of the Carbon "E". Carbon E. It is the penultimate carbon and tells the viewer if the sugar is D or L. This monosaccharide is D. Quiz Score: 89.5 out of 100
