Biology Test 1B

Which of the following best describes the arrangement of the two strands of DNA?

• Twisted

• Antiparallel

  
  

• Bonded

• Alternating

If a DNA molecule is found to be composed of 40% thymine, what percentage of adenine would be expected?

• 10%

• 20%

• 40%

• 80%

Which of the following is found on RNA but not DNA?

• Uracil

• Deoxyribose Sugar

• Phosphate

• Adenine

A DNA strand has the following bases: A A G C C A. What are the bases on its complimentary strand?

• A A G C C A

• T T C G A A

• T T C G G T

• U U A T T C

What is the name of the currently accepted model of DNA replication?

• Conservative

• • Semiconservative

• Dispersive
  

• Liberal

Adenine always pairs with...

• Adenine

• Guanine

• Thymine

• Cytosine

Cytosine always pairs with...

• Cytosine

• Adenine

• Guanine

• Thymine

The spot where DNA synthesis begins and the DNA strands are separated forming a "bubble" is called the...

• Replication Origin

• DNA Helicase

• Replication Fork

• Base Pairs

An enzyme that unwinds the double helix of DNA and separates the DNA strands in preparation for DNA replication.

• Helicase

• Ligase

• Polymerase

• Primase

Enzyme involved in DNA replication that adds individual DNA nucleotides to produce a new DNA molecule

• Helicase

• Ligase

• Polymerase

• Primase