DNA Structure and Replication

Which of the following is NOT part of a nucleotide

• sugar

• phosphate

• nitrogen base

• amino acid

In DNA, the base adenine pairs with the base ___.

The backbone of DNA is made of

• base pairs

• sugars and phosphates

• only sugars

• only phosphates

If a DNA molecule has 30% Guanine bases, what percentage of Cytosine bases will it have?

The first step in DNA replication is

• to unwind and unzip the two strands

• to break the backbone in half so the sequence can be copies

• to attach new nucleotides

• to proof read the sequence

What does semiconservative replication mean?

• that the DNA is proof read at the end of the process

• that the newly made DNA has one strand from the original DNA and one new strand

• that the newly made DNA will send half of its strand to one cell and leave the old strand in the original cell

• that the original DNA strands come back together after replication is over

The DNA sequence is TTA CCG What is the complementary sequence?

The DNA sequence is ATG what is the complementary sequence?

What does DNA stand for?

• Deoxyribonucleic acid
• Denitrogenous acid
• Deribonucleic acid
• Diribonucleic acid

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base
• sugar, oxygen, nitrogen base
• sugar, phosphate, nitrogen base
• sugar, phosphate, protein