The Haemoglobin molecule
Question:

Consider the Haemoglobin molecule , which of the statements bellow is incorrect ?

 

(MITBLOSSOMS: “Blood the stuff of Life”)

https://blossoms.mit.edu/videos/lessons/blood_stuff_life

 

1 People tried to answer this question

Hemoglobin consists of four polypeptide subunits ;2 alpha chains and two beta chains

Haemoglobin, contained in the red cells of the blood and constituting the main site of iron in the body.

Each Haemoglobin molecule can combine with four oxygen molecules, but with no more.The complete combination is called oxygen saturation.

The combination of Haemoglobin and oxygen is strong, thereforeoxygen can not be pulled from the blood even if the surrounding pressure of oxygen is low.

Correct !!!

Good job !!!

Incorrect. Try again !

The statement is correct, The Haemoglobin indeed can combine with four oxygen molecules.

Incorrect. Try again !

The statement is correct. The Haemoglobin indeed constituting the main site of iron in the body.

 

Incorrect. Try again !

The statement is correct, The Haemoglobin indeed consists of four polypeptide subunits.



Comments:
1.  Levy Yardena (22.06.2017 pm 12.13.04)
Dear Liad

Dear Liad

The animation is enchanting and the music is charming (you did not give credit for the music). However the subtitles moved too fast for me to read, so if you can slow them down a bit it will help students.  I understand now that this is the reason you did not put any introductory paragraph before the question, but even a short statement will do the work, like: "The following animation demonstrates the Hemoglobin molecule. Please watch and answer the following question."  Consider that.

The question itself is in a negative format, which is a bit uncomfortable for the students, but the main difficulty is that most of the information on the distractors is a content knowledge that the student should know in advance and not from the animation or the blossoms video linked, making the question to be of the lower levels of the Bloom’s Taxonomy. It will help if the iron atom would appear on the animation and that the distractors will refer to its role on the molecule.

All the best, Yardena



History of edits
Edited BY: Liad Cohen Edit Date: 2017-05-31 01:39:54
Edited BY: Liad Cohen Edit Date: 2017-05-31 01:38:32
Edited BY: Liad Cohen Edit Date: 2017-05-31 01:37:42
Edited BY: Liad Cohen Edit Date: 2017-05-31 01:37:04
Edited BY: Liad Cohen Edit Date: 2017-05-31 01:35:55
Edited BY: Liad Cohen Edit Date: 2017-05-31 01:34:50
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