DNA Structure, Replication, & Protein Synthesis Review

Which of the following is NOT part of a nucleotide

• sugar

• phosphate

• nitrogen base

• amino acid

Adenine pairs with

• Thymine

• Thyme

• Guanine

• Glutamine

The backbone of DNA is made of

• base pairs

• sugars and phosphates

• only sugars

• only phosphates

If a DNA molecule has 30% Guanine bases, how many Cytosine bases will it have?

• 30%

• 25%

• 20%

• 10%

The two strands of DNA are held together with

• covalent bonds

• hydrogen bonds

• nothing

One function of DNA is to

• code for proteins

• code for lipids

• code for carbohydrates

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 ATG what is the complementary sequence?

• ATG

• GTA

• TAC

What are the three components of a nucleotide?

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

Cytosine always pairs with

• Adenine
• Thymine
• Uracil
• Guanine