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Unit 4 week 10 - assessment and intro to dna

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No Notes for this video, just watch before starting microscope labs

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Seeing the Invisible: van Leeuwenhoek's first glimpses of the microbial world

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The last page of the packet is a coloring sheet of the cell membrane. I am unable to post this page, please get a hard copy in the classroom.

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Some cells are visible to the unaided eye

The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an amoeba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny.

Smaller cells are easily visible under a light microscope. It's even possible to make out structures within the cell, such as the nucleus, mitochondria and chloroplasts. Light microscopes use a system of lenses to magnify an image. The power of a light microscope is limited by the wavelength of visible light, which is about 500 nm. The most powerful light microscopes can resolve bacteria but not viruses.

To see anything smaller than 500 nm, you will need an electron microscope. Electron microscopes shoot a high-voltage beam of electrons onto or through an object, which deflects and absorbs some of the electrons. Resolution is still limited by the wavelength of the electron beam, but this wavelength is much smaller than that of visible light. The most powerful electron microscopes can resolve molecules and even individual atoms.

Adenine

The label on the nucleotide is not quite accurate. Adenine refers to a portion of the molecule, the nitrogenous base. It would be more accurate to label the nucleotide deoxyadenosine monophosphate, as it includes the sugar deoxyribose and a phosphate group in addition to the nitrogenous base. However, the more familiar "adenine" label makes it easier for people to recognize it as one of the building blocks of DNA.

How can an X chromosome be nearly as big as the head of the sperm cell?

No, this isn't a mistake. First, there's less DNA in a sperm cell than there is in a non-reproductive cell such as a skin cell. Second, the DNA in a sperm cell is super-condensed and compacted into a highly dense form. Third, the head of a sperm cell is almost all nucleus. Most of the cytoplasm has been squeezed out in order to make the sperm an efficient torpedo-like swimming machine.

The X chromosome is shown here in a condensed state, as it would appear in a cell that's going through mitosis. It has also been duplicated, so there are actually two identical copies stuck together at their middles. A human sperm cell contains just one copy each of 23 chromosomes.

A chromosome is made up of genetic material (one long piece of DNA) wrapped around structural support proteins (histones). Histones organize the DNA and keep it from getting tangled, much like thread wrapped around a spool. But they also add a lot of bulk. In a sperm cell, a specialized set of tiny support proteins (protamines) pack the DNA down to about one-sixth the volume of a mitotic chromosome.

Carbon

The size of the carbon atom is based on its van der Waals radius.

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The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an amoeba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny.

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Continue Size of Life Table Work and Making Mini Poster Diagram - Due Monday 1/10

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Continue Size of Life Table Work and Making Mini Poster Diagram - Due Monday 1/10

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After Notes Complete the Practice in the Weekly Packet and the Exit Ticket

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After Notes Complete the Practice in the Weekly Packet and the Exit Ticket

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Complete questions 1-6 of the exit ticket - available in English and Spanish

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How to Survive the Spanish Flu (1918-20)

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Antigenic Drift: How the Influenza Virus Adapts

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Antigenic Drift: How the Influenza Virus Adapts

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I wasn't able to find a free version online - you will have to come in and watch this afterschool if you miss it.

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After the Video - Complete the "How May I Take Your Order Reading and Questions" in weekly packet. 

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After the Video - Complete the "How May I Take Your Order Reading and Questions" in weekly packet. 

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Extra Credit Food Labels are available in the classroom, send me a teams message if you want them sent to you.

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Building Biomolecules Lab- If you missed this lab, or did not finish, you will need to come after school to work on it. 

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Building Biomolecules Lab- If you missed this lab, or did not finish, you will need to come after school to work on it. 

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Afterschool Help: Monday-Wednesday of each week

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Specimen B Link: Click Here
Specimen F Link: Click Here
Specimen G Link: Click Here
Pro vs Eu Video Link: Click Here

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For this activity you will need access to the classroom. I have place images of organelles around the room near items with a similar function as the organelle.

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Today we took a quiz on biomolecules. This can be made up at any point during the semester. You may also retake this quiz.

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Spend Class time finishing up assignments for the class

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Spend Class time finishing up assignments for the class

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Diagram/ Reference Images For Both Prokaryotic and Eukaryotic Cell Labs

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Diagram/ Reference Images For Both Prokaryotic and Eukaryotic Cell Labs

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Today was an Early Release Day

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14 Amazing Things Under a Microscope You Can't Unsee

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14 Amazing Things Under a Microscope You Can't Unsee

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14 Amazing Things Under a Microscope You Can't Unsee

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If you are unable to pass the "Microscope Quiz" or you are out of class this day - you will need to complete this virtual lab in place of the in person Microscope Lab

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Microscopy-UK Home (Resources for the microscopy enthusiast and amateur, including free bimonthly e-zine, Micscape.)

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The Home of Enthusiast Microscopy on the Web!

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There are two more pages to this lab that have you color both a plant and animal cell.

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Today was used to catch up/ spend time working on assignments for other classes. 

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Today was used to catch up/ spend time working on assignments for other classes. 

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Today we did the Day 2 Procedures for the Gummy Bear Lab, Finished the Cell Transport Notes, and completed the Cell Transport Exit Ticket

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Today we did the Day 2 Procedures for the Gummy Bear Lab, Finished the Cell Transport Notes, and completed the Cell Transport Exit Ticket

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Today we completed the Gummy Bear Lab and took the Cell Organelle Quiz. The quiz can be made up at any time, the gummy bear lab make up will take 3 days afterschool (no more than 10 mintues)

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Today we completed the Gummy Bear Lab and took the Cell Organelle Quiz. The quiz can be made up at any time, the gummy bear lab make up will take 3 days afterschool (no more than 10 mintues)

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BBC Our Secret Universe The Hidden Life of the Cell

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BBC Our Secret Universe The Hidden Life of the Cell

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There is a battle playing out inside your body right now. It started billions of years ago and it is still being fought in every one of us every minute of every day. It is the story of a viral infection - the battle for the cell.

This film reveals the exquisite machinery of the human cell system from within the inner world of the cell itself - from the frenetic membrane surface that acts as a security system for everything passing in and out of the cell, the dynamic highways that transport cargo across the cell and the remarkable turbines that power the whole cellular world to the amazing nucleus housing DNA and the construction of thousands of different proteins all with unique tasks. The virus intends to commandeer this system to one selfish end: to make more viruses. And they will stop at nothing to achieve their goal.

Exploring the very latest ideas about the evolution of life on earth and the bio-chemical processes at the heart of every one of us, and revealing a world smaller than it is possible to comprehend, in a story large enough to fill the biggest imaginations. With contributions from Professor Bonnie L Bassler of Princeton University, Dr Nick Lane and Professor Steve Jones of University College London and Cambridge University's Susanna Bidgood.

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BBC Our Secret Universe The Hidden Life of the Cell

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There is a battle playing out inside your body right now. It started billions of years ago and it is still being fought in every one of us every minute of every day. It is the story of a viral infection - the battle for the cell.

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Activity 1: Cancer Cells and Cell Division
Activity 2 Question 5: How does Cancer spread?
Activity 2 Questions 6 - 9: How does Cancer spread?

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If you missed this quiz or would like to retake it, you can do so next week.

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Activity 3: Why don't we al have cancer?
Activity 4: What haven't we cured cancer?
Activity 5: 6 Common Misconceptions About Cancer

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Cell Specialization and Organ System Reading

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Cell Specialization and Organ System Reading

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Exploring Cells and Tissues of the Circulatory System

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Exploring Cells and Tissues of the Circulatory System

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Exploring the Cells and Tissues of the Circulatory System Lab

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Exploring the Cells and Tissues of the Circulatory System Lab

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Exploring the Cells and Tissues of the Circulatory System

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The test can be made up/ retaken starting next week.
All late work from this unit is due Friday 4/1, no late work will be accepted after this date.

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Human Body Systems Functions Overview: The 11 Champions (Older Video 2016)

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You will need to make up this lab after school.