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Life · Guided lesson

Connect cell parts to jobs

About 10 minutes · 3 reading + 7 practice and checks
Time includes reading, practice, and questions. Extra videos or further study are optional.
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A labeled cell-function model with membrane transport predictions, cell-type comparisons and an explanation connecting cells to tissues and organs.

Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.

What to include

  • Classify supplied living and nonliving observations.
  • Label major structures with their distinct functions.
  • Compare typical plant, animal and bacterial cells and name an exception.
  • Predict two passive-movement directions with permeability assumptions.
  • Link cells, tissues and organs and repair the supplied flawed model.
  • Include the six changed-case responses with explanations.

Review and revise

Use these criteria to check your work and choose what to improve.

  • Method: applies the course-specific rules to the supplied cases with visible intermediate work.
  • Accuracy: results agree with the stated facts, units, boundaries and independent checks.
  • Reasoning: explains why the result follows and identifies a limitation or unresolved question.
  • Transfer: completes changed cases and revises the final project when a relevant assumption changes.
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Before you begin

The idea in everyday life

Fictional model cell needs four jobs: store DNA instructions; build a protein; regulate exchange with surroundings; support energy conversion. Available parts: nucleus, ribosome, plasma membrane, mitochondrion.

The idea

A structure supports a function. In a typical nucleated cell, the nucleus stores most DNA, ribosomes build proteins, the membrane regulates exchange and mitochondria help transfer energy from nutrients into usable cellular forms. A useful model names what a part does; it does not label an organelle as a tiny person making choices.

Follow along

Connect cell parts to jobs — worked practice

A structure supports a function. In a typical nucleated cell, the nucleus stores most DNA, ribosomes build proteins, the membrane regulates exchange and mitochondria help transfer energy from nutrients into usable cellular forms. A useful model names what a part does; it does not label an organelle as a tiny person making choices.

Fictional model cell needs four jobs: store DNA instructions; build a protein; regulate exchange with surroundings; support energy conversion. Available parts: nucleus, ribosome, plasma membrane, mitochondrion.

  1. 1. 1. Inventory

    Match each stated job to the supplied part.

    You should see: DNA—nucleus; protein building—ribosome; exchange—membrane; energy conversion—mitochondrion.

  2. 2. 2. Link

    Trace instructions to protein construction without moving the whole nucleus.

    You should see: Information from DNA can be carried to ribosomes; the nucleus does not itself assemble every protein.

  3. 3. 3. Distinguish

    Explain why the membrane and mitochondrion are not interchangeable.

    You should see: One regulates a boundary; the other supports energy conversions inside the cell.

  4. 4. 4. Predict

    State what the model predicts if ribosomes are absent.

    You should see: The specified protein-building step lacks its machinery; this is a model prediction, not a diagnosis.

Now change one thing

The changed model loses the structure regulating entry and exit. Enter nucleus, ribosome, membrane or mitochondrion.

Your work

What to finish

A labeled four-part cell-function map with one justified failure prediction.

Common mistake

Watch for this

Cellular energy transformations use existing sources such as nutrients. The model must preserve energy rather than claim creation from nothing.

How can I tell I understand it?

Explain a changed missing part through its function rather than its name alone.

Try 3 questions

Quick knowledge check

Answer all 3 questions. Get at least 2 right and the lesson completes automatically.

Not yet passed

You’ll get an explanation for each answer. Signed in? Your results save to your account.

1Which part assembles proteins?
2Which label best fits the nucleus of the supplied cell?
3Why is “mitochondria create energy from nothing” misleading?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
2
Finish this lesson

Pass the check. We’ll save the progress.

Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.

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Sources and further reading

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OpenStax: eukaryotic cell structures
Source & access notes · checked 2026-10-01

Web open/search showed the official page, its topic heading and relevant concept description. This is a content/source check, not a provider endorsement.

Access: Official page retrieved with the web reader on 2026-10-01; interactive tools and videos were not certified by retrieval.

Reuse: Original fictional teaching cases, calculations, questions and examples; link and short factual paraphrase only. No copied source exercises or illustrations.

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