A variety of cell types possess flagella - VCE - SSCE Biology - Question 3 - 2004 - Paper 1
Question 3
A variety of cell types possess flagella. Having the correct length of flagella is important; for example, a sperm without a flagellum is unable to swim.
Chlamydomo... show full transcript
Worked Solution & Example Answer:A variety of cell types possess flagella - VCE - SSCE Biology - Question 3 - 2004 - Paper 1
Step 1
From the data shown in the above graph, what happens after flagella are removed?
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Answer
After the flagella are removed, the Chlamydomonas cells initially show no growth in flagellum length. Over time, however, they begin to regrow their flagella, which grow back to an average length of approximately 9.5 µm.
Step 2
Explain which field of view would allow a more accurate measure of flagellum length.
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Answer
Lens C, with a field of view of 75 µm in diameter, would allow for a more accurate measure of flagellum length. A smaller field of view provides greater magnification, allowing for more precise measurements of length, which is particularly important when measuring structures that are approximately 10 µm long.
Step 3
In what way is this cell not typical of a true plant cell?
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A cell wall of a typical plant cell is made of cellulose, while Chlamydomonas has a cell wall made of a glycoprotein, which distinguishes it from true plant cells.
Step 4
Name the structure labelled X in the Chlamydomonas figure above.
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The structure labelled X is the Golgi complex.
Step 5
Describe its function.
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The Golgi complex functions as an organelle that packages and stores materials for export from the cell.
Step 6
What is this waste product of photosynthesis?
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The waste product of photosynthesis is oxygen.
Step 7
Name the high-energy compound produced during cellular respiration of glucose.
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Answer
The high-energy compound produced during cellular respiration of glucose is adenosine triphosphate, or ATP.
Step 8
Name the condition that determines how much of this high-energy compound is produced.
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The presence or absence of oxygen determines how much ATP is produced. When oxygen is present, cells produce significantly more ATP compared to when it is absent.
Step 9
Compare the relative amounts of high-energy compound produced under the altered condition.
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In the presence of oxygen, cells can produce approximately 36 ATP (or 38 ATP) per one molecule of glucose, whereas in the absence of oxygen, the yield is much lower, producing only 2 ATP.
