This document appears to be a quiz on biology concepts related to the variety of life. It contains 20 multiple choice questions testing knowledge of topics like the quaternary structure of hemoglobin, properties of hemoglobin, polysaccharides (including starch and cellulose), plant cell structures, chloroplast functions, and processes of root hair cells and xylem vessels. The quiz is out of 36 total points.

1. AS AQA Biology
UNIT 2
Chapter 10 Revision Quiz
The variety of life
Total: ___ / 36
___ %

2. 1. How many polypeptide chains are there in haemoglobin?
(1)
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2. Explain the quaternary structure of haemoglobin? (3)
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3. Give two properties that haemoglobin must be able to do.
(2)
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4. What does partial pressure mean? (1)
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5. Which oxygen molecule is the hardest for haemoglobin to
associate with? (1)
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6. What effect does an increased carbon dioxide
concentration have on the shape of haemoglobin? (1)
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3. 7. How does this affect the dissociation curve? (1)
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8. Name 3 polysaccharides (3)
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9. What bonds form between the monosaccharaides
involved? (1)
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10.
What reaction occurs to form these bonds? (1)
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11.
(1)
Which polysaccharide is made from beta glucose?
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12.
(2)
Give two reasons why starch is a good energy store
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13.
What is a microfibril? (1)
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4. 14.
What bonds form between the individual cellulose
molecules? (1)
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15.
Name three structures that are found in plant cells
but not animal cells (3)
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16.
Label the following diagram (6)
17.
Give two ways that the chloroplasts are adapted for
their job (2)
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5. 18.
Give two functions of the cell wall (2)
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19.
By what process do root hair cells absorb water? (1)
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20.
(2)
What is special about the walls of a xylem vessel?
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