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Sci 7 Ch 10.1 Section Review
1. Below is a sequence of bases along one side of a DNA molecule. Write out the sequence of DNA bases that
would pair with the ones shown.
DNA-
2. What is DNA replication? __________________________________________________________________
_________________________________________________________________________________________
3. What 3 parts make up DNA?
a. ___________________________________
b. ___________________________________
c. ___________________________________
4. Explain what each of the following items do in protein synthesis:
a. messenger RNA- _____________________________________________________________________
b. transfer RNA- ________________________________________________________________________
c. ribosome- ___________________________________________________________________________
5. Write out the messenger RNA bases that would pair with the DNA strand shown.
mRNA -
6. A certain species of squirrel is usually gray. Occasionally a white squirrel, called an albino, is born. An albino
squirrel happens because:
a. DNA replication does not occur
c. a mutation in the gene for fur color occurs
b. mitosis produces too many white fur cells
d. both of the parents have white fur
7. Name two genetic disorders and explain the type of mutation that causes each.
a. ______________________________________________________________________________
b. ______________________________________________________________________________
8. Which process could result in the type of mutation that causes Down’s syndrome?
a. cellular respiration
c. mitosis
b. meiosis
d. amniocentesis
9. How many amino acids are present in a protein that requires 1,500 bases in its code? (Hint: It takes 3 bases
to code for 1 amino acid). _____________________________________________________________
Sci 7 Ch 10.2 Section Review and Concepts Questions
1. What is selective breeding? ________________________________________________________________
2. Name three instances where people use selective breeding.
a. ____________________________________________________________________________________
b. ____________________________________________________________________________________
c. ____________________________________________________________________________________
3. What is genetic engineering? _______________________________________________________________
__________________________________________________________________________________
4. What is a genome? ______________________________________________________________________
5. Where is an organism’s genome found? _______________________________________________________
6. What is mitochondrial DNA?________________________________________________________________
7. Why is mitochondrial DNA used to study human origins? _________________________________________
8. Of the four nitrogen base pairs, cytosine always pairs with _________________________ (word, not letter).
9. Draw and label a DNA molecule with these terms: sugar, phosphate, A, T, C, and G.
10. Write out the DNA bases that pair with the base sequence shown below:
atggcgatt
11. Put these steps of DNA replication in the correct order from beginning to end.
_____ a. two daughter molecules have been produced – each of one original strand and one new
strand
_____ b. the double helix partially unwinds
_____ c. a new strand is put together along each original strand using pieces made from molecules in
the cytoplasm
_____ d. the base pairs separate
12. Proteins are made of smaller molecules called __________________________________.
13. The base sequence of the DNA is shown below. What would be the corresponding base sequence of the
messenger RNA?
GTCAGGATC
14. What is amniocentesis? __________________________________________________________________
_________________________________________________________________________________________
15. When does DNA replication occur and why? __________________________________________________
_________________________________________________________________________________________