Hemoglobin, a substance

Answer choices

1. A

   Too Strong6% picked this

   A hemoglobin molecule that has picked up three oxygen molecules will probably acquire a

   A hemoglobin molecule that has picked up three oxygen molecules will be more effective at picking up another oxygen molecule than one that has only picked up one or two oxygen molecules. But being more effective at picking up another oxygen molecule does not make it likely that one will pick up another oxygen molecule. This is similar to the difference between a plurality of votes and a majority of votes. Someone who has received more votes than anyone else has not necessarily received a majority of votes.

   6%
2. B

   Too Strong1% picked this

   The only factor determining how effective a hemoglobin molecule is at picking up oxygen molecules is how open the shape

   It’s given that the shape of a hemoglobin molecule is a factor determining how effective a hemoglobin molecule is at picking up oxygen molecules, but that does not mean that it is the only factor.

   1%
3. C

   Correct87% picked this

   A hemoglobin molecule that has picked up three oxygen molecules will be more effective at picking up another oxygen molecule than will a hemoglobin

   Why this is right

   This is supported by the second statement.

   Skill tested: Most Supported · how this choice captures the argument's function is the move to repeat next time.

   87%
4. D

   Contradiction1% picked this

   A hemoglobin molecule that has picked up four oxygen molecules will have the same shape as a hemoglobin molecule that has not

   It’s given that grabbing an oxygen molecule changes the shape of the hemoglobin molecule.

   1%
5. E

   Too Strong6% picked this

   Each hemoglobin molecule in human blood picks up between one and four oxygen molecules in or near the lungs and transports them to

   While it is known that hemoglobin plays the role of transporting oxygen, the statements do not indicate that the only role of hemoglobin is oxygen transport. It turns out that some hemoglobin does not carry any oxygen and instead serves as an antioxidant and regulator of iron metabolism (source: Wikipedia). While you’re not expected to know this, it is important to see that the statement explains a function of hemoglobin, but not suggest that this is the only function of hemoglobin.

   6%