Thursday, December 7, 2017

Macromolecules

Please do the following things to understand more about macromolecules:

1) Read this information from Khan Academy on Macromolecules


Introduction
Think back to what you ate for lunch. Did any of your lunch items have a “Nutrition Facts” label on the back of them? If so, and if you had a look at the food's protein, carbohydrate, or fat content, you may already be familiar with several types of large biological molecules we’ll discuss here. If you’re wondering what something as weird-sounding as a “large biological molecule” is doing in your food, the answer is that it’s providing you with the building blocks you need to maintain your body – because your body is also made of large biological molecules!
Just as you can be thought of as an assortment of atoms or a walking, talking bag of water, you can also be viewed as a collection of four major types of large biological molecules: carbohydrates (such as sugars), lipids (such as fats), proteins, and nucleic acids (such as DNA and RNA). That’s not to say that these are the only molecules in your body, but rather, that your most important large molecules can be divided into these groups. Together, the four groups of large biological molecules make up the majority of the dry weight of a cell. (Water, a small molecule, makes up the majority of the wet weight).
Large biological molecules perform a wide range of jobs in an organism. Some carbohydrates store fuel for future energy needs, and some lipids are key structural components of cell membranes. Nucleic acids store and transfer hereditary information, much of which provides instructions for making proteins. Proteins themselves have perhaps the broadest range of functions: some provide structural support, but many are like little machines that carry out specific jobs in a cell, such as catalyzing metabolic reactions or receiving and transmitting signals.
We’ll look in greater detail at carbohydrates, lipids, nucleic acids, and proteins a few articles down the road. Here, we’ll look a bit more at the key chemical reactions that build up and break down these molecules.
Monomers and polymers
Most large biological molecules are polymers, long chains made up of repeating molecular subunits, or building blocks, called monomers. If you think of a monomer as being like a bead, then you can think of a polymer as being like a necklace, a series of beads strung together.
Carbohydrates, nucleic acids, and proteins are often found as long polymers in nature. Because of their polymeric nature and their large (sometimes huge!) size, they are classified as macromolecules, big (macro-) molecules made through the joining of smaller subunits. Lipids are not usually polymers and are smaller than the other three, so they are not considered macromolecules by some sourcesstart superscript, 1, comma, 2, end superscript. However, many other sources use the term “macromolecule” more loosely, as a general name for the four types of large biological moleculesstart superscript, 3, comma, 4, end superscript. This is just a naming difference, so don’t get too hung up on it. Just remember that lipids are one of the four main types of large biological molecules, but that they don’t generally form polymer
s.

Friday, November 17, 2017

Photosynthesis and Cellular Respiration Extension

Here is a document that will help introduce the next topic that we are going to cover: Cellular Respiration

Photosynthesis and Cellular Respiration

Thursday, November 2, 2017

Videos for 11/3/17

Here are the videos for my classes on 11/3/17


  1. Brain Games: Addiction
  2. Bill Nye: Plants

Photosynthesis Reading and Video

Here are two of the things that you should work on today:

  1. Intro to Photosynthesis Reading
  2. Video on Photosynthesis
  3. Practice-Quiz on Photosynthesis
Keep these things in mind while working on this today:
  1. How does photosynthesis transform the solar energy to make glucose?
  2. How is photosynthesis important to animals?
  3. Where does photosynthesis take place?

Friday, October 27, 2017

Alternative Task to the Test

Click here for the Alternative Task for the Test

Please complete the activity on your computer. You will receive a grade once you present the PowerPoint to me (not to the class).

Friday, October 20, 2017

Extension: DNA and Protein Synthesis

First, complete this survey to help me improve the class.

Click here for the survey

Do these interactive activities where you build a model of DNA and build a protein.
  1. Build a DNA molecule
    • What kind of pattern do you see doing this activity?
  2. Transcribe and Translate a Gene
    • What is the difference between DNA and RNA?
    • How does the code in DNA and RNA differ?
    • How does the code in RNA and the amino acids differ?
  3. DNA Transcription and Translation Video


Tuesday, October 17, 2017

Videos and reading for 10/17/17


  1. Login to accelerate learning and finish the assignments here
  2. Watch this video and answer the questions after you watch the video.
    1. What does DNA stand for?
    2. What type of shape does DNA have?
    3. Each rung of the ladder is made of how many bases?
    4. Adenine pairs with what other base?
    5. Cytosine pairs with what other base?
    6. What according to the video makes you YOU!


Thursday, October 5, 2017

Videos and questions

Watch these videos and answer the questions in your notebook after the video:

Click her for Specialized Cells by the Amoeba Sisters
Questions:

  1.  Do all cells look the same? Why or Why not?
  2. What is the function of the plant epidermal cell? Why are they specialized?
  3. What do guard cells do for a plant?
  4. How does the structure (the shape of) a red blood cell help with its function?
  5. Why do white blood cells not really have a shape?
  6. What are the different types of muscle cells?
  7. Neurons are able to carry signals long distances and quickly, why would this be important?

Questions:
  1. What does DNA stand for?
  2. Why are proteins called the building blocks of life?
  3. What does DNA tell proteins to do?
  4. Where does DNA live?
  5. Where do Amino Acids live?
  6. What do we call the partial copies of DNA?
  7. What do we call the "protein building machine" of the cell?
  8. So, what is DNA?

Friday, September 1, 2017

WELCOME to SCIENCE!!

Welcome to the new school year! My name is Mr. Nelson and I am your teacher. To contact me, the best way is to sign up for Remind. Instructions on how to sign up for that are found here. You can also contact me by email at stnelson@psd1.org. Check back here regularly for new class information.