Which of the Following Statements Correctly Describes Haemoglobin

question 21

Multiple Choice

Which of the following statements correctly describes haemoglobin?

• A)It consists of a protein made up of four highly folded polypeptide chains and four iron-containing, non-protein, nitrogenous groups.
• B)It appears reddish when combined with CO₂.
• C) It can combine only with O₂ molecules.
• D) It is found in the nuclei of red blood cells.

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Definitions:

Variable Expenses

Costs that vary in direct proportion to changes in the level of activity or production volume.

Fixed Expenses

Costs that do not change in total over a wide range of activity levels or over a short period, such as rent or salaries.

Net Income

The total earnings of a company, subtracting total expenses from total revenue.