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SCIENCE 9
NAME: _____________________
BLK: ____ DATE: ____________
CHAPTER 4 (P. 120-147)
THE NUCLEUS CONTROLS THE FUNCTIONS OF LIFE
1. What colour is a pallid bat? ______________________________________________
2. Where does the pallid bat live? ____________________________________________
3. What is the advantage to the pallid bat to be coloured the way that it is?
________________________________________________________________________
________________________________________________________________________
4. What cell part controls all the functions in a cell? ______________________________
The Function of the Nucleus Within the Cell (p.122-135)
1. What are chromosomes composed of? ______________________________________
2. Explain what a gene is. __________________________________________________
________________________________________________________________________
3. Genes contain information that produces what? _______________________________
4. What organelle or cell part has the following function?
a. Change glucose into energy. ________________________________________
b. Controls flow of material in and out of cell. ____________________________
c. Makes proteins. __________________________________________________
d. Jelly like substance surrounding organelles. ____________________________
e. Specialized organelles that trap sunlight. _______________________________
f. Provides support for a plant cell. _____________________________________
g. Transport system for materials in the cell. ______________________________
h. Place where cellular respiration occurs. ________________________________
i. Makes ribosomes. _________________________________________________
j. Membrane covered sacs that transport proteins. __________________________
k. Protects the contents of the nucleus. __________________________________
l. Sorts and packages protein. _________________________________________
m. Openings in the nuclear membrane. __________________________________
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5. Draw and label figure 4.5 on page 126.
6. What chemical are the A, T, C, and G made of? _______________________________
7. What is chromatin? _____________________________________________________
________________________________________________________________________
8. How many molecules of DNA are in each strand of chromatin? __________________
9. When a cell is growing, what does the DNA look like? _________________________
10. What does chromatin form into when the cell is about to divide? _________________
________________________________________________________________________
11. Draw and label figure 4.7 on page 128.
12. How many pairs of chromosomes are found in every cell of a normal human? ______
13. How many chromosomes in total are there in a normal human cell? ______________
14. What is the #23 pair of chromosomes if you are a
 male ___________________
 female ___________________
15. Explain what a gene is. _________________________________________________
________________________________________________________________________
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16. How many different proteins are produced in our bodies? _____________________
17. Draw and label figure 4.9 on page 129.
18. What is a genome? _____________________________________________________
________________________________________________________________________
19. How many base pairs are there in a human cell? ______________________________
20. Where are the proteins produced that are needed to make your muscles work?
_____________________________Your eyes work? ____________________________
21. Explain the difference between an enzyme and a hormone. ____________________
________________________________________________________________________
________________________________________________________________________
22. You need to know the steps of protein synthesis as outlined on page
131 of your text.
23. Do question #11 on page 135. ____________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
24. Do question #13 on page 135. ____________________________________________
25. Do question #1 on page 135.
a. ________________________________________________________________
b. ________________________________________________________________
c. 1. ______________________________________________________________
2. ______________________________________________________________
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4.2 Mutation (p.136-145)
1. What gets changed in a gene mutation? _____________________________________
2. What causes a mutation to occur? __________________________________________
3. What colour is a Kermode, or spirit bear? ____________________________________
4. List three ways that a gene mutation might occur.
 _________________________________________________________________
 _________________________________________________________________
 _________________________________________________________________
5. What is the likely colour are the parents of the spirit bear? _______________________
6. Explain what a positive mutation is. _______________________________________
________________________________________________________________________
7. Explain what a negative mutation is. _______________________________________
________________________________________________________________________
8. Explain what a neutral mutation is. ________________________________________
________________________________________________________________________
9. Give an example of a positive mutation that helps humans and how it helps. ________
________________________________________________________________________
________________________________________________________________________
10. Give an example of a positive mutation that helps plants and how it helps. _________
________________________________________________________________________
________________________________________________________________________
11. Give 2 examples of a negative mutation that that is harmful to humans and why it is
harmful.
a. ________________________________________________________________
________________________________________________________________________
________________________________________________________________________
b. ________________________________________________________________
________________________________________________________________________
________________________________________________________________________
12. Give an example of a neutral mutation that occurs in animals.
a. ________________________________________________________________
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13. Explain what a mutagen is and list 3 mutagens that can cause mutations. _________
________________________________________________________________________
a. ________________________________________________________________
b. ________________________________________________________________
c. ________________________________________________________________
14. Explain what gene therapy is. ____________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
15. READ PAGE 144 AND ANSWER THE 3 QUESTIONS ON THE PAGE.
1. ________________________________________________________________
2. ________________________________________________________________
__________________________________________________________________
__________________________________________________________________
3. i. ______________________________________________________________
ii. _____________________________________________________________
iii. _____________________________________________________________
16. Do question #2 on page 145.
a. ________________________________________________________________
b. ________________________________________________________________
c. ________________________________________________________________
17. Do question #10 on page 145.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
18. Do question #13 on page 145. ____________________________________________
________________________________________________________________________
________________________________________________________________________
19. Do question #16 on page 145. ____________________________________________
________________________________________________________________________
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CHAPTER 4 REVIEW
1. One side of a DNA molecule contains the bases AACTCGGATACCA. What would
the sequence be on the other side? ____________________________________________
2. What are the three types of gene mutations?
 ________________________________________________________
 ________________________________________________________
 ________________________________________________________
3. Explain how DNA contains the messages for thousands of proteins.
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
4. Do you think the number of chromosomes in an animal or plant cell reflects how
advanced the organism is? Explain why or why not. ______________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
5. Draw and label a small section of DNA showing the double helix. Label the nitrogen
bases--A, D, T, C--and the phosphate and ribose and a gene section.
6. Do question #21 on page 147.
a) _______________________________________________________________
__________________________________________________________________
b) _______________________________________________________________
__________________________________________________________________
c) _______________________________________________________________
__________________________________________________________________
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Chapter 4 KIM Vocabulary
1. Chromosome
2. DNA
3. Gene
4. Nucleus
5. Nucleolus
6. Protein
7. Cell Wall
8. Cell Membrane
9. Cytoplasm
10. Organelle
11. Mitochondria
12. Ribosomes
13. ER
14. Chloroplast
15. Vesicles
16. Golgi Body
17. Vacuoles
18. Nuclear pores
19. Enzymes
20. Hormones
21. Gene Mutation
22. Gene therapy
23. Mutagen
24. Negative mutation
25. Neutral mutation
26. Positive mutation