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A model of the structure of DNA

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Lesson details

Lesson outcome

Waxaan sharxi karaa dhismaha DNA-da oo waxaan qiimeyn karaa moodellada loogu talagalay.

Introduction

In this lesson: I can describe the structure of DNA and evaluate models of it. Genetic material is made of DNA. DNA is a long chemical molecule, made of two chains of smaller chemical units joined together.

Show transcript
Genetic material is made of DNA. DNA is a long chemical molecule, made of two chains of smaller chemical units joined together. All of the DNA in a cell is called the genome. The chains are spiralled around one another in a double helix, with links across the middle. Scientific models of DNA can be evaluated for their strengths and weaknesses.

Worksheet

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Quizzes

  1. 1. Which three of these cells store DNA in their nucleus?

    • Correct answer:Plant
    • Bacteria
    • Correct answer:Fungi
    • Correct answer:Animal

  2. 2. Which of these images are **not** a model of an animal cell?

    • Correct answer:a close up of a green substance in a circular picture with a white background and a circular picture with a green substance in the middle of the imagea
    • a diagram of a cell membrane with the names of the cell membranes and the names of the cell membranesb
    • a white egg sitting on top of a wooden table next to a blue piece of paper on top of a wooden tablec

  3. 3. Choose the image that represents DNA.

    • a fingerprint of a fingerprint of a fingerprint of a fingerprint of a fingerprint of a fingerprint of a fingerprint of a fingerprint of a fingerprint of a fingerprint of a fingerprint of a fingerprint of a fingerprinta
    • a paper cut out of an animal's head with a nose and teeth on the side of itb
    • an orange ball with a bunch of white bows on it's top and a white bow on the bottom of the ballc
    • Correct answer:

  1. 1. Which one of these is **not** a feature of DNA?

    • Correct answer:Short, chemical molecule
    • Double helix structure
    • Chains joined across the middle
    • Two strands

  2. 2. Which of these images are models of DNA?

    • Correct answer:a model of a multicolored structure with a toothbrush sticking out of the top of the structurea
    • a pink object that is shaped like the letter o, with a curved design on the front of itc
    • a white and orange ball with a picture of a cross on it's side and a red ball with a cross on it's sided

  3. 3. Evaluating a model in science means to identify what?

    • Correct answer:strengths
    • details
    • materials
    • Correct answer:weaknesses

  4. 4. Choose which of the options below are analogies.

    • DNA is a large molecule made up of smaller chemical units.
    • Correct answer:DNA is like an instruction booklet.
    • The genetic code is formed by A, T, C and G units that make up DNA.
    • Correct answer:The genetic code is like the letters that make words in an instruction booklet.

What pupils see

The same lesson as a pupil sees it. You can set any section as work on its own.

  • IntroductionPrepare
  • Starter quizActivate · 3 questions
  • Lesson videoLearn
  • Exit quizCheck · 4 questions
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