DNA Test Review Bio

What is the shape of DNA?

• Double helix

• single stranded

• heart shaped

• lopsided

A nucleotide consists of a

• Nitrogen Base

• 5 Carbon Sugar

• Phosphate group

• All of these are correct

The two strands of a DNA double helix are

• Purines

• Pyrimidines

• Complementary

• Identical

DNA replication begins when the two strands of the original DNA

• are separated by the breaking of hydrogen bonds between nitrogen bases

• acts as a template

• attracts a nitrogen base

• destroys the entire genetic code

After DNA replication, the two DNA molecules that are made

• are opposites

• are identical

• leave the nucleus

• can never replicate again

Each combination of three nitrogen bases on messenger RNA is called a(an)

• Anticodon

• Codon

• Enzyme

• Nucleic Acid

Cytosine and Thymine are

• Purines

• Pyrimidines

During protein synthesis, the mRNA strand is made through the process of:

• Duplication

• Transcription

• Translation

• Binge-watching Netflix

In messenger RNA, each codon specifies a particular

• nucleotide

• purine

• amino acid

• pyrimidine

What type of bond holds the nitrogen bases together in a DNA strand?

• Covalent

• Gold

• Ionic

• Hydrogen