Here are some exercises to help you understand the week 2 objectives
Be able to recognize and give functions for the following biomolecules: Monosaccharides, disaccharides, polysaccharides. Fats, phospholipids, steroids. Amino acids, proteins.
The following exercise will help you recognize the key differences between carb0hydrates and lipids.Click on the green flag and observe which structures are lipids and which are carbohydrates.
Click next and then click the appropriate button
Continue hitting next and choosing the correct button
It is also recommended to do the mastering bio activities in the study area for chapter 5.
Here is a second activity for carbs and lipids
Be able to distinguish primary, secondary, tertiary and quaternary structure
This can be difficult for people to remember. A few key points
- The levels represent interactions within a protein. They do not necessarily represent steps in protein folding .
- You should know (1) What types of bonds are used and (2) What parts of the amino acids are involved. Be sure you can identify R groups and the backbone portions of amino acids.
3. Read the the section on 4 levels of protein structure in chapter 5.4
4. Do the activity on protein folding in Mastering Biology
5. Watch the following video and answer the embedded questions:
https://edpuzzle.com/embed/media/575adfdf98ce82292d1b1a4d
Here is a review of macromolecules you need to know
https://edpuzzle.com/embed/media/54e792d9073086a942ceed2f
Be able determine whether an environment is hypotonic, isotonic or hypertonic to a cell.
Be able to predict what will happen if a plant or animal cell is put in a hypotonic, isotonic or hypertonic environment. .
Example:
- A cell with an internal NaCl concentration of . 1M is put into a solution of .01 M NaCl. The salt can not cross the membrane. What happens?
Note: Problems like the first one may appear in exams and quizzes. Problems like the second one will appear in Mastering Biology and the Group Worksheet.
Be able to describe the signal pathway that determines how insulin regulates blood sugar.
The following exercise (insulin game) requires little understanding of the insulin pathway itself, you should be able to put the steps together logically. This exercise is tricky in that if you get a step incorrect you have to start from the beginning. Note; One of the steps, exocytosis, is covered in more detail in Chapter 6 (And we will cover it in the next unit). For now, you just need to know that membrane proteins go from membrane bound structures called vesicles to the outer membrane. Here is a short video to help
https://edpuzzle.com/embed/media/5507787130ee9e3e5fb4c500
Directions
1. Click on the Green Flag
2. Click on the buttons in the correct order of events. If you make a mistake, you need to start again. Note that the buttons shading will change if you do it correctly, so you can remember which buttons you already pressed.
If you complete this, take a screen shot and send it to me for 2 extra credit points!
