DNA Study Guide For A Test

17 Questions | By Verdun | Last updated: Mar 21, 2022 | Total Attempts: 119

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DNA in Biology study for a test

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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