The ______________ nitrogen bases found in DNA nucleotides are _______________(a), _______________(G), _____________ (C), and _______________(T).
3.
A DNA nucleotide has three parts: a ____________ called ___________, a _____________groupwhich consists of P and O atoms), and a ________________________.
4.
A and G called _____________ (two rings of carbon).
A. 
Pyrimidines
B. 
Purines
C. 
Helicases
5.
C and T are called _________________ (one ring of carbon).
A. 
Pyrimidines
B. 
Purines
C. 
Helicases
6.
In 1953, James ____________ and Francis _________ suggested a model for the structure of DNA that looked like a spiral staircase: ______________.
A. 
James, Zone, zero
B. 
Madision, Drock, single
C. 
Winslow, Crock, Triple
D. 
Watson, Crick, Doublex Helix
7.
Two nucleotide chains separate by unwinding; each chain serves as a template for a new nucleotide chain.Nuceotides are held together wih a _____________backbone.
A. 
Replication Fork
B. 
Sugar-phosphate
C. 
Hydogen bond
8.
Two chains separate at the ______________ by enzymes (_____________).
9.
As the helicase enzymes move along the DNA molecule, they break _______________between the bases, and the chains separate.
10.
Enzymes________________ bind to the separated chains of DNA; one nucleotide s time, it constructs a new complementary chain of nucleotides.* Product._______________________________________________________
11.
Suppose that the sequence of nucleotides in one chain of the original DNA molecule is A-T-T-C-C- G. DNA polymerases would produce a new nucleotide chain with the sequence of ____________________.
12.
The process of DNA replication occurs with one error in every 10,000 paired nucleotides. A change in the nucleotide sequence at even one location, (_____________), may have serious effects on new cells.
13.
Sickle Cell Anemia: caused by a __________________ that substitutes adenine for thymine; results in defective hemoglobin/sickle shaped red blood cells (RBCs)
14.
_____________________ is the loss of a chromosome segment.ABCDEF --------------> ABEFG CD (lost)
A. 
Duplication and deletion
B. 
Deletion
C. 
Inversion
D. 
Reciprocal transiocation
15.
__________________________ result when homologous chromosomes break at different points.. and swap segmentsABCDEFG ABEFG ----------->ABCDEFG ABCDODEFG
A. 
Deletion
B. 
Reciprocal transiocation
C. 
Inversion
D. 
Duplication and deletion
16.
_______________________ results when nonhomologous chromosomes exchange segments.ABCDEFG ABEDCFG ---------->HIJKLMNO HIJKCDEFG
A. 
Duplication and deletion
B. 
Inversion
C. 
Reciprocal transiocation
D. 
Deletion
17.
__________________ results when a broken segment is inserted in reverse order. ----- _----- ABCDEFG -----------> ABEDCFG
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Sample Question
What will most likely be the effect of the change in the DNA molecule ?
Section F – DNA damage, repair and
recombination
F1 Mutagenesis
F2 DNA damage
F3 DNA Repair
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