Semester 2 (Spring) · Week 16 (teaching week 15 of 16)May 3–7

Recombinant DNA, restriction enzymes, ligation, transformation, controls.

Your PLTW coursework: Biomedical Innovation ▸ Problem 6: Molecular Biology in Action ▸ "Activity 6.1.1 Restriction Enzyme Challenge"

What to do if absent
Color keyLearn firstGet orientedDo the workLab daySafety netCheck yourself
Portal terms
CER:
Claim, Evidence, Reasoning: make a claim, back it with evidence, explain your reasoning.
SOP:
Standard Operating Procedure, the exact steps to follow (especially in a lab).
Tracker:
Your PLTW progress log where you record completed evidence.
myPLTW:
The PLTW course site where you do the online activities. Find it in Clever with your Microsoft sign-in, right next to Schoology.
Learn first

Week overview - Recombinant DNA Workflow: cutting, joining, and moving genes safely

May 3–7

Map the recombinant from cut through ligation and , and set up the practices that make it possible.

Week arc
  1. 1In your notebook, list the recombinant steps in order: cut, join, insert, grow.
  2. 2Define , , , and in your own words.
  3. 3Draw a and mark where a would cut to open it.
  4. 4Show how joins a gene of interest into the opened .
  5. 5Run the virtual cloning and record each step you complete.
  6. 6List two practices required when working with engineered organisms.
By week end
  • • You will be able to sequence the recombinant steps.
  • • You will be able to explain the role of restriction enzymes and .
  • • You will be able to state practices for cloning work.
The plan

Daily lessons this week

Open any day for its full lesson, the work due that day, and guided notes.

MondayMon, May 3
Workflow concepts: tools, processes and limits

Recombinant outline with four ordered steps, named or reagent for each, specificity explanation, and positive/ identification with rationale.

TuesdayTue, May 4

Evidence for

WednesdayWed, May 5
Biotechnology oversight: weigh the evidence

One sentence explaining why -resistance selection markers are a specific biosafety concern, plus three lab rules you would require.

ThursdayThu, May 6
pGLO setup and DNA-band records

One record with actual kit condition labels, setup dates and May 7 -count fields marked pending; gel image and lane records when supplied. If unavailable, submit the explicitly invented C1/G1 practice record and identify the missing actual evidence.

FridayFri, May 7
pGLO plate observations and gel analysis

One plate-observation and gel-analysis record: actual pGLO condition labels, count or uncountable-growth description, fluorescence and status; then ladder distances, a , sample-size estimates and a conclusion about pattern consistency with an identity limit. Keep any invented fallback separately labeled within that same record.

Get oriented

Quick intro to the week

  • Hook: scientists can cut a gene from one organism and paste it into another, and today you learn how that is done safely.
  • Today's goal: walk the full cloning and the rules that surround it.
  • Monday bioethics debate fits: should there be limits on engineering organisms for human use?
  • Reminder: your graded cloning is submitted on the class site.
Do the work

Your PLTW coursework this week

Do this: Advance your PLTW molecular biology problem by completing the recombinant and plan in the online course shell.

Know when done
  • • Restriction enzymes cut at specific sequences and joins fragments.
  • • A carries a gene of interest into a competent host cell.
Be able to do
  • • Sequence the steps of a recombinant .
  • • State the practices for working with engineered organisms.

📋 PLTW evidence due: a completed recombinant diagram and a cloning plan in the course shell.

All PLTW activities are completed inside the PLTW course environment: this page only gives direction.

The plan

This week's PLTW tracker

Use this chart to keep your place. Nothing on it is turned in through the portal.

DayWorkTurn in
Monday · Mon, May 3Workflow concepts: tools, processes and limitsRecombinant DNA workflow outline with four ordered steps, named enzyme or reagent for each, restriction enzyme specificity explanation, and positive/negative control identification with safety rationale.
Tuesday · Tue, May 4Evidence for
Wednesday · Wed, May 5Biotechnology oversight: weigh the evidenceOne sentence explaining why antibiotic-resistance selection markers are a specific biosafety concern, plus three lab rules you would require.
Thursday · Thu, May 6pGLO setup and DNA-band recordsOne record with actual kit condition labels, setup dates and May 7 colony-count fields marked pending; gel image and lane records when supplied. If unavailable, submit the explicitly invented C1/G1 practice record and identify the missing actual evidence.
Friday · Fri, May 7pGLO plate observations and gel analysisOne plate-observation and gel-analysis record: actual pGLO condition labels, count or uncountable-growth description, fluorescence and status; then ladder distances, a standard curve, sample-size estimates and a conclusion about pattern consistency with an identity limit. Keep any invented fallback separately labeled within that same record.
  • M: engineered organism debate
  • W: controls
  • Th: gel expectations
  • F: quiz

Turn in: Recombinant DNA, restriction enzymes, ligation, transformation, controls. weekly work due Molecular workflow plan.

Go to Schoology to turn this in.

Submit one PDF. Schoology attaches your name to your upload; on the page itself, write your period and code. Name the file: FirstName LastName - Assignment Title - YYYY-MM-DD.pdf.

Open Schoology PDF upload help

If you cannot get in, see Mr. Mendoza. Do not skip the work.

Lab day

Lab day: what to bring & watch

Equipment you'll need
Micropipettes and sterile tipsPlasmid DNA sampleRestriction enzyme and bufferDNA ligaseCompetent cellsMicrocentrifuge tubesPersonal protective equipment
Learn.Genetics (University of Utah): cloning and recombinant DNA

This explainer accompanies the PLTW lab protocol: watch it before lab.

Safety net

What to do when absent

If YOU are absent

Most days, this class is your PLTW coursework: and PLTW is online and individual. So being out usually just means doing exactly what we did in class, from home.

Open Clever, then myPLTW

Sign in to Clever with your district Microsoft account to open Schoology or myPLTW. Follow today's posted steps. If myPLTW will not open, use the posted alternative and tell Mr. Mendoza. Turn in your completed work through the Schoology assignment.

Was today a lab or a group activity?

You can't do those from home: do this instead: Virtual cloning .

If MR. MENDOZA is absent

Class still runs. A substitute will post today's plan: complete the online activity above; it's built to be self-guided. Need the concept taught without a teacher? Use this authoritative explainer:

Learn.Genetics (University of Utah): cloning and recombinant DNA
Words

Vocabulary

recombinant DNA/PLAZ-mid/
Explore

Teacher-posted resources

Classroom documents for this lesson are posted in Schoology. Open Clever, then Schoology, and find each one by the name shown on its card.

Use during lessonFor: Everyone
BI Problem 6 Molecular Biology - Complete Module
worksheet/handoutPosted in Schoology
Open in Schoology

Open this when the class reaches this activity and use it to complete the required lesson artifact.

Use during lessonFor: Everyone
BI 6.1.2 Lab Module Organizer (Blank)
worksheet/handoutPosted in Schoology
Open in Schoology

Open this when the class reaches this activity and use it to complete the required lesson artifact.

Catch-up / reteachFor: Need extra support
BI 6.1.2 Cloning Module 1 Ligation Overview
worksheet/handoutPosted in Schoology
Open in Schoology

Use this if you were absent, got stuck, or need another pass before you submit the lesson artifact.

Sign in to Clever with your district Microsoft account to open Schoology or myPLTW. Follow today's posted steps. If myPLTW will not open, use the posted alternative and tell Mr. Mendoza. Turn in your completed work through the Schoology assignment.

Aligned to

Standards this week

• Biotechnology for Health and Disease 072125 · 5.4 Molecular and Genetic Technology
• Biotechnology for Health and Disease 072125 · 5.5 Laboratory SOPs
Check yourself

WebXam practice

Tap an answer to check it · nothing is recorded or graded
A lab assistant notices the calcium chloride for a bacterial transformation experiment expired three months ago but looks clear. What should they do?
You plate E. coli and notice a second, unexpected species grew after 24 hours. What most likely explains this?
You are plating bacteria for a transformation. When holding the plate, what should you wear to avoid contaminating the sample?
In which storage cabinet should you keep the rubbing (isopropyl) alcohol used to sterilize a molecular biology bench?