This question is about cell division - AQA - GCSE Biology Combined Science - Question 2 - 2022 - Paper 1
Question 2
This question is about cell division.
Write the biological structures from the box in the correct order of size.
cell
chromosome
gene
nucleus
Smallest
Largest
F... show full transcript
Worked Solution & Example Answer:This question is about cell division - AQA - GCSE Biology Combined Science - Question 2 - 2022 - Paper 1
Step 1
Write the biological structures from the box in the correct order of size.
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Answer
The correct order from smallest to largest is:
gene
chromosome
nucleus
cell
Step 2
Name Process A.
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Answer
The name of Process A is differentiation.
Step 3
How many cell divisions are needed to form a 16-cell embryo from the original fertilised egg?
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Answer
To form a 16-cell embryo, 4 cell divisions are needed.
Step 4
How many chromosomes will there be in each of the embryo cells?
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Each of the embryo cells will contain 46 chromosomes.
Step 5
Describe one change in the cell that occurs during each of the stages of the cell cycle.
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Answer
Stage 1: During this stage, the cell grows, increasing the number of organelles and DNA replicates.
Stage 2: Chromosomes line up in the center of the cell to prepare for division.
Stage 3: The cell membrane divides, resulting in two identical cells.
Step 6
Compare the growth of boys with the growth of girls.
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From Figure 5, boys are generally taller than girls from birth up to age 18.
Boys grow faster than girls between ages 10 and 14.
Girls experience their growth spurts earlier, generally around ages 11 to 13, whereas boys have their growth spurts later, between ages 13 and 14.
Overall, the mean height of boys eventually surpasses that of girls after age 14.
Step 7
Give one way that cell division by mitosis is important in fully grown animals.
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Cell division by mitosis is important for the repair of tissues in fully grown animals.
