Download Identifying On the lines provided, identify each

Organic Molecules U3M4 Worksheet
Name _____KEY_________
Identifying On the lines provided, identify each statement as describing
carbohydrates, lipids, nucleic acids, or proteins.
__carbohydrates__ 1. the main source of energy for living things
__proteins_______ 2. help carry out chemical reactions
__lipids_________ 3. important parts of biological membranes
__nucleic acids____ 4. found in viruses, which are nonliving
__proteins_______ 5. transport substances in and out of cells
__proteins_______ 6. composed of amino acids
__carbohydrates__ 7. sugar and starches
__nucleic acids____ 8. store and transmit hereditary information
9. What are four groups of organic compounds found in living things?
a. __carbohydrates___________
b. __lipids__________________
c. __nucleic acids_____________
d. __proteins________________
10. Circle the letter of each sentence that is true about carbohydrates.
a. Starches and sugars are examples of carbohydrates.
b. Living things use them as their main source of energy.
c. The monomers in sugar polymers are starch molecules.
d. The monomers of proteins are amino acids
11. Circle the letter of each way that fats are used in living things.
a. As parts of biological membranes
b. To store energy
c. To give plants rigidity
d. As chemical messengers
12. The monomers that make up nucleic acids are known as _nucleotides________.
13. A nucleotide consists of what three parts? __5-carbon sugar, phosphate,
nitrogen base___________________________________________________
_____________________________________________________________
BIO A U3M3 WS
14. Proteins are polymers of molecules called ___amino acids_______________.
15. What are four roles that proteins play in living things?
a. _builds up, maintains and replaces tissues in the body__________
b. _transports nutrients in and out of the cell
c. _allow muscles to contract (chemical messengers)
d. _speed up chemical reactions
Completion On the lines provided, complete the following sentences.
16. Lipids are made up of fatty acids and __glycerol_____________.
17. Glucose, galactose, and fructose are carbohydrates called _monosaccharides_.
18. The two basic kinds of nucleic acids are _deoxyribonucleic acid_______ and
_ribonucleic acid__________.
19. Using the brown paper bag test or the Sudan test is testing for lipids.
20. A lipid that has carbon-carbon single bonds and are hard to break down
___saturated__________________________.
BIO A U3M3 WS