1. Identify the biological structures involved in transcription; (DOK 2, Biology 5.a);

2. Model the transcription process as a group (DOK 3, Biology 5.a).

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Materials:

Textbook, 3-ring binder with 5 tabs, pen and/or pencil, loose leaf paper, and colored pencils.

Do Now:

Fill in the blanks, using the appropriate word from the list below:

single stranded ribose

deoxyribose thymine

uracil double stranded

The three differences between DNA and RNA are that DNA has __________, while RNA has___________; DNA has the sugar ___________, while RNA has the sugar __________; and DNA is ___________, while RNA is ____________.

(5 minutes)

Set:

1. Have a student read Part I from the handout/ activity:

A DNA molecule (labelled “A”) replicates to produce two new DNA molecules (labelled “B”). Both of the “B” DNA molecules then replicate to form four new DNA molecules (labelled “C”). Do any of the “C” DNA molecules look like the original “A” DNA molecule? [Yes!! Replication produces multiple copies of the parent DNA.]

[When is it important to have exact replicates of one’s DNA?/ When have you seen DNA “split” before?] During telophase, when DNA is split into different cells. Recall for sex cells, DNA is divided into four cells so it’s important to have multiple copies.]

(5 minutes)

Procedure:

1. Begin teacher-led discussion, reviewing replication (see above Do Now & Set).

2. Complete lesson on replication, reviewing:

i. The reason replication is important [produces many genes]

ii. Stress that replication creates identical copies of the original DNA molecule.

3. Activity: Movie on Transcription

4. Overhead [Showing beginning of transcription with definitions]

i. Definitions, cont’d:

a. mRNA: Carries genetic information from the nucleus to the

cytoplasm of cell.

c. tRNA: Transports a specific amino acid to the ribosomes during

translation.

d. rRNA: Ribosomes where proteins are made.

5. Activity: Part II of handout

6. Instruct students to complete quiz, to be turned in for a grade.

7. Review (See Closure)

(30 minutes)

Closure:

Transcription is the process of rewriting DNA as RNA. The newly made RNA, which is mRNA, leaves the nucleus and heads for the cytoplasm, where it helps tRNA & rRNA produce proteins. Tomorrow, we’re going to continue our discussion by finishing up with transcription. So, we will have learned how every cell in your body creates more DNA through replication and how your DNA signals for your cells to produce proteins. Class dismissed!

(5 minutes)

Assessment/ Evaluation:

Objectives:

• Identify the biological structures involved in transcription; (DOK 2, Biology 5.a).

Informal: The teacher will listen to students (M) recall the biological structures involved in transcription after, viewing the transcription movie (C).

Formal: The teacher will collect the students’ quizzes, prompting them to identify the functions of the aforementioned biological structures (C) and record the grades in the grade book (D).

• Model the transcription process as a group (DOK 3, Biology 5.a).

Informal: The teacher will listen to students (M) discuss the transcription process as a group, while completing their group-assessment work on transcribing mRNA from DNA (C).

Formal: The teacher will collect the students’ quizzes, exhibiting their understanding of their group activity by allowing them to correctly identify the base pair rules and structure of RNA (C), and record the grades in the grade book (D).

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