Life Sci: DNA Structure and Replication

What three parts make up 1 nucleotide?

• Phosphate

• Sugar

• Nitrogen containing base

• Lipid

If the left side of DNA contains the following bases: ATCGATCG, what would the right side contain?

• CGATCGAT

• TAGGTAGG

• TAGCTAGC

• ATCGATCG

What is the end result of DNA replication?

• 2 semi-conservative strands of DNA

• 1 semi-conservative strand of DNA

• Half of a semi-conservative strand.

• Nothing is created

Chargaff's rules state that....

• The amount of A's always = the amount of C's and the amount of T's always = the amount of G's.

• The amount of A's always = the amount of A's and the amount of C's always = the amount of C's.

• The amount of A's always = the amount of G's and the amount of C's always = the amount of T's.

• The amount of A's always = the amount of T's and the amount of C's always = the amount of G's.

What was Rosalind Franklin's contribution to the discovery of DNA?

• She built the first 3D model of DNA

• She took the first X-Ray image of DNA

• She discovered the nitrogen containing bases

• She discovered the covalent bond in DNA

What bases are considered Purines?

• A & G

• A & T

• C & G

• C & A

What bases are considered Pyrimidines?

• A&G

• A&T

• C&T

• C&G

What does the term semi-conservative mean?

• DNA consists of half an old strand and half a new strand and the code stays conserved.

• DNA consists of two old strands and the code stays conserved.

• DNA consists of two new strands and the code stays conserved.

• DNA consists of half an old strand and half a new strand and the code changes each time.

What does DNA Polymerase do?

• It helps breakdown the new strand in DNA replication and it proofreads the strands.

• It helps build the new strand in DNA replication and it proofreads the strands.

• It helps unwind the double helix.

• It forms bonds

What contribution did Watson & Crick make to DNA?

• They took the first X-Ray image of DNA

• They built the first 3D model of DNA

• They discovered the pairing of the nitrogen containing bases.

• They discovered the type of bond that is found in DNA