Unit 7 Review

Adenine pairs with ______________ .

• Guanine

• Cytosine

• Thymine

Here are the steps of replication.  Which answer choice lists them in the correct order?

I. Two identical strands of DNA are formed.

II. Free floating nucleotides in the cell match up to the divided DNA and DNA polymerase connects the bonds.

III. DNA “unzips”

• III, II, I

• I, II, III

• II, III, I

Which of the following would be the opposite side of this DNA strand:

ATC GTCATG

• ATC GTCATG

• TAG CAGTAC

• GCA TCGGCT

DNA replication results in two DNA molecules.  

• Each with two new strands

• One with two new strands and the other with two original strands

• Each one with one new strand and one original strand

Which is the subunit of DNA and what is the function of the subunit?

• Monosaccharidees that will be used to provide quick energy to the cell

• Lipids that stores energy and provides padding

• Nucleotides that stores the instructions for making proteins

DNA has been described as a double helix. How can you describe a double helix?

• It looks like a twisted ladder

• It is a single stranded twisted string

• It looks like a regular ladder

What is formed from DNA replication?

• two double-stranded DNA molecules

• one double-stranded DNA molecules

• two single-stranded DNA molecules

What is the purpose of DNA replication?

• To carry amino acids to the ribosome

• to copy DNA for cellular division

• to make mRNA

Which is the correct sequence of bases that would pair with  A T C G A T  during DNA replication?

• TAG CTA

• UAG CUA

• CGA TCG

What is the first step in DNA replication?

• New bases are added to each strand of DNA

• Hydrogen bonds break and DNA unzips

• Genetic information is carried out to the ribosome