Biology Assignment

March 26, 2004

Period A

11.3 Section Assessment pg. 307

1. Mutation is any change in the DNA sequence.

2. Similarly, a change in a single nitrogen base can change the entire structure of a protein because a change in a single amino acid can affect the shape of the protein. In a Frameshift mutation proteins that are produced as a result of Frameshift mutation seldom function properly because such mutations usually change many amino acids.

3. Mutation affects the reproductive cells of an organism by changing the sequences of nucleotides within a gene in a sperm or an egg cell. Mutation to a heart cell may damage or impair the function of the cell, for example it may cause the muscle to lose its ability to make a protein that contracts, or a skin cell may lose its elasticity.

4. The relationship between mutations and cancer is that sometimes mutation just like cancer can carry into the next generation.

Pg. 311-313 Chapter 11 Assessment #1-23
1. A

2. C

3. D

4. A

5. B

6. A

7. A

8. B

9. A

10. D

11. Transcription

12. Translation

13. Ribosomal RNA

14. Transfer RNA

15. Codon

16. Mutation

17. Mautagen

18. Point mutation

19. Mutation

20. DNA Replication

21. The mutation in a lung cell would not be passed on to the next offspring because the Zygote in the Lung Cell will not die off.

22. Codons canít consist of two bases instead of three for each amino acids because there are only three bases.

23. When the strands of mRNA arrive in the cytoplasm, ribosomes attach to them like clothespins clamed onto a clothesline.