Cell Topic

Explain the Function of that Cell Part Clearly

This science revision note aims to help your child

– identify the relevant cell part

– proper scientific keywords to explain the concepts clearly.

 

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MUST-KNOW about cells:

1. Identify the different parts of a cell and their functions.

    • Cell wall
    • Cell membrane
    • Cytoplasm
    • Nucleus
    • Chloroplasts

 

2. Differentiate between plant and animal cells.

    • Plant cells have cell walls while animal cells do not have cell walls.
    • Chloroplasts are only found in cells that photosynthesise.

 

Structure of a typical animal cell



 

Structure of a typical plant cell

Have you remembered all the must-know science knowledge?

If you have done so, let’s try answering this question!

The table below show cells V, W, X, Y and Z and the cell parts that are present in the cells.

Identify which cell(s) is/are able to reproduce. Explain your answers.

STEP 1

Explain the cell part that is involved in reproduction.

  • Nucleus contains the genetic information of the cell and is required for cell division.

 

STEP 2

Identify the cells that contain a nucleus.

 

FINALLY, put your answer together

Identify which cell(s) is/are able to reproduce. Explain your answers.

Answer: Cells V, X and Y are able to reproduce. Cells V, X and Y have nucleus. The nucleus contains the genetic information of the cell and controls most of the activities of the cell such as cell division.

 

Let’s try another example!

 

The diagram below shows Cell B and Cell C.

Scienceshifu - animal and plant cell

Which cell(s) would allow characteristics to be passed down from parents to children? Explain your answer.

 

STEP 1

How are characteristics passed down from parents to children?

Characteristics are passed down from parents to children through genetic information.

 

STEP 2

Which part of the cell contains genetic information?

The nucleus.

 

STEP 3

Do cells B and C contain a nucleus? Label all the parts in both cells to figure this out.

Yes, both Cell B and Cell C contain a nucleus. See the cell parts below.

Scienceshifu - animal cell and plant cell labelling of parts

Note:

Take note of how we label the cell wall and the cell membrane. The line must be pointing correct part of the cell.

The vacuole is not tested in the PSLE. The function of the vacuole is to temporarily store food, water and minerals

 

FINALLY, put your answer together

Question: Which cell(s) would allow characteristics to be passed down from parents to children.

Answer: Both Cell B and Cell C contain the nucleus. Genetic information containing the characteristics are passed down from the parents to the children.

 Note

For a complete answer, the cell part AND the function of that cell part must be explained here.

Finally, always link back to the question.

 

We don’t recommend this

 

Incomplete answer: Both Cell B and Cell C would allow characteristics to be passed down from parents to children because both cells contain a nucleus, which passes down characteristics from parents to children.

This answer is incomplete as you did not mention how the nucleus passes down characteristics from parents to children. You have to specify that characteristics are passed down through genetic information and that this genetic information is found in the nucleus of cells.

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Click here to read the other revision notes on cells – What happens when a cell part is removed?

>>> https://scienceshifu.com/cells-topic-what-happens-when-a-cell-part-is-removed/

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Andy Ling

Guiding your child to be the master of science concepts

 

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