Download Begin by going to the address below

NAME: _________________________________ DATE: ______________ SECTION: ______
Begin by going to the address below:
http://www.chem4kids.com/files/bio_intro.html
On the left side of the page you will see several topics. Click on those topics that are listed
below in bold print and underlined and answer the questions.
CARBOHYDRATES
1. For what do living things use carbohydrates?
2. What is a disaccharide?
3. What is the most important monosaccharide on the earth?
4. Which 2 sugars make up table sugar?
5. What are two types (NOT FOODS) of polysaccharides and where can each be found?
LIPIDS
6. In the list below, circle the lipids. There should be 3!
fats
sugars
waxes
steroids
proteins
7. What is the basis of a steroid molecule?
1
8. Of what is triglyceride made?
9. What is a fatty acid?
10. What is the difference between an unsaturated and a saturated fatty acid?
11. Why does the human body store energy as fat?
NUCLEIC ACIDS
12. List 4 types of nucleic acids.
13. What is another name for building block?
14. What are the three parts of a nucleotide?
AMINO ACID STRUCTRURE
15. Draw and label the parts of an amino acid (see the yellow box).
2
16. What do amino acids build?
17. How many different amino acids make up all proteins?
18. What three types of side groups do all amino acids have?
20 AMINO ACIDS
19. How many essential amino acids are there for adult humans?
20. Click on lysine and draw the structure of lysine.
21. Click on tryptophan and draw the structure of tryptophan.
3
PROTEINS
22. A protein is a long chain of what molecules?
23. What are the four structural forms of a protein?
24. What are the two types of secondary protein structure?
ENZYMES
25. What do enzymes act as?
26. What analogy is used to describe how enzymes work?
27. What is catalysis in step 3?
28. List 4 things that regulate enzyme activity.
4