DNA Study Guide For A Test
17 Questions
| Total Attempts: 113
DNA in Biology study for a test
Questions and Answers
- 1._________________________ - Copying DNA in a cell
- A.
BNA Replication
- B.
RNA Replication
- C.
DNA Replication
- 2.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
- A.
Inversion
- B.
Deletion
- C.
Reciprocal transiocation
- D.
Duplication and deletion
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