2.1.1 Identify the processes shown in figures 1 and 2 - NSC Life Sciences - Question 2 - 2016 - Paper 1
Question 2
2.1.1 Identify the processes shown in figures 1 and 2.
2.1.2 Which ONE of the processes shown in figures 1 and 2 takes place before cell division starts?
2.1.3 Pre... show full transcript
Worked Solution & Example Answer:2.1.1 Identify the processes shown in figures 1 and 2 - NSC Life Sciences - Question 2 - 2016 - Paper 1
Step 1
Identify the processes shown in figures 1 and 2.
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Answer
Figure 1 represents DNA replication. Figure 2 represents transcription.
Step 2
Which ONE of the processes shown in figures 1 and 2 takes place before cell division starts?
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Answer
DNA replication takes place before cell division starts.
Step 3
Predict the result if the process mentioned in QUESTION 2.1.2 does not take place.
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Answer
If DNA replication does not take place, the genetic material will not be equally distributed between daughter cells. This may lead to abnormal cell formation and potentially cause physiological disorders such as cancer.
Step 4
What is the specific name for this error?
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Answer
The specific name for this error is 'mutation'.
Step 5
State any TWO causes of the error mentioned in QUESTION 2.1.4.
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Answer
Continuous exposure to X-rays, cosmic rays, or UV rays.
Consumption of carcinogenic food.
Step 6
By referring to the table above, write, from left to right, the correct base sequence of codons 1 to 6.
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Answer
The correct base sequence is:
GTC
GTG
CAG
CAG
CCG
GUC
Step 7
State TWO reasons for this argument.
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Answer
Since only a small piece of DNA is analysed, a DNA profile may not be unique to an individual.
Human testing performed in private laboratories may not follow uniform standards and quality controls.
Step 8
List TWO sources of DNA evidence in a crime scene.
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