Question 17
An experiment was carried out to investigate the separate effects of two plant hormones on tobacco plant cells - VCE - SSCE Biology - Question 17 - 2009 - Paper 1
Question 17
Question 17
An experiment was carried out to investigate the separate effects of two plant hormones on tobacco plant cells. The graphs below show results of the tre... show full transcript
Worked Solution & Example Answer:Question 17
An experiment was carried out to investigate the separate effects of two plant hormones on tobacco plant cells - VCE - SSCE Biology - Question 17 - 2009 - Paper 1
Step 1
A. A lack of auxin results in no starch being accumulated over the 48 hours.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Without auxin, the tobacco plant cells do not accumulate starch during the entire 48-hour period, indicating auxin's critical role in starch accumulation.
Step 2
B. Over 48 hours, cytokinin stimulates the accumulation of starch in tobacco cells.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The addition of cytokinin leads to an observable increase in starch content over time, demonstrating its positive effect on starch accumulation in tobacco cells.
Step 3
C. The addition of each of the hormones resulted in an immediate effect on starch accumulation by tobacco cells.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Both hormones trigger a rapid response in starch accumulation, reflecting their immediate influence on the metabolic processes of the cells.
Step 4
D. The increase in starch during the second 12-hour period is greater than the increase in any other 12-hour period.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Analysis of the data shows that the most significant accumulation of starch occurs in the second 12-hour period, indicating a possible heightened response or sensitivity of the cells during that time.
