Web Quest: DNA Genetics



DNA WEBQUEST

This web quest takes you through various websites to better understand the role DNA plays in life. Use the following questions and directions to navigate through the sites. Record the information to the questions as you find it. If you download this assignment from Mr. Hathaway’s class website, you do not have to type in web addresses.

Topic: DNA introduction



Simply build a DNA molecule with the interactive animation. Stop when it says how long it takes you to make a DNA molecule of a human being at the rate you are progressing.

Read the text below and answer the following questions:

1. In order to speed up the copying process (replication), DNA replication begins at ___________ locations along each chromosome.

2. The two DNA strands are pulled apart and copied in both directions at the rate of about _________ nucleotides per second.

3. _______________________ base-pairing ensures that DNA strands are copied accurately, with just a few errors for each round of replication.

Topic: DNA structure



This is a basic tour of genetics. Click on “What is DNA?” and then answer these questions as you click along either “next” or “previous” on the bottom of display panel of the presentation.

1. What part of a cell are the instructions for a living organism found? _______________

2. What is the name of molecule where these instructions are encoded on?

_________________________________________

3. What is the shape of DNA called? _______________________

4. What two molecules make up the sides or “backbone” of the DNA molecule?

______________________ + ______________________ .

5. What matches with T: ______ , and ______ matches with G:

6. Write the names of the nitrogen bases below:

T: _________________________

A: _________________________

C: _________________________

G: _________________________

7. What do genes tell/instruct the cell to make? ____________________

DNA Replication

33ps://highered.sites/9834092339/student_view0/chapter14/structural_basis_of_dna_replication.html

4.Click, “play” to view the animation. ​Make sure you have the text option on, or you won’t be able to see/hear what the animation is saying. ​Listen using headphones and/or read the subtitles in the tan box below the animation.

a.DNA replication is the process in which one double­stranded DNA molecule is used to make ________ double­stranded molecules with ___________________ DNA sequences.

b.For this process to occur, the two DNA strands are ___________________ and the DNA replication machinery is assembled at the replication fork.

c.The two DNA strands are used as ______________________ to create newly synthesized DNA strands.

d.The key feature that allows a DNA molecule to produce two DNA molecules with the __________________________ is the AT/CG rule, also known as Chargaff's rule.

e.By this mechanism, one double­stranded DNA molecule provides the information to create __________ double­stranded molecules with identical __________ sequences.

f.Each copy contains one _______________________________ and one _______________________________ .

g.This mechanism is called _________________________ DNA replication because half the DNA molecule is conserved from the original molecule.

plete the complementary sequence for this sequence: A A C T G G A T T C

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