DNA Test Review

WHY must we use RNA if we already have genetic code in DNA?

• RNA is portable and can be read by the ribosome
• RNA is more accurate than DNA
• The cell needs a backup code and uses RNA
• DNA and RNA can be used interchangeably 

Deoxyribose Sugar

• DNA

• RNA

• Both

How does the central dogma of molecular biology describe the flow of genetic information in a cell?

• DNA -> RNA -> Proteins
• Proteins -> DNA -> RNA
• RNA -> DNA -> Proteins
• There is no specific order of these molecules

Double Helix

• DNA

• RNA

• Both

What happens to the RNA code when it leaves the nucleus?

• It remains as RNA forever
• It finds a ribosome and is read
• It leaves the cell
• It returns to the nucleus

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Which of the following lists all the bases found in DNA?

• A. Adenine, Thymine, Cytosine, Uracil

• B. Adenine, Thymine, Cytosine, Guanine

• C. Adenine, Thymine, Cytosine, Ribose

• D. Guanine, Uracil, Thymine, Ribose

Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

What does DNA polymerase do during DNA replication?

• Adds complementary nucleotides to build the new strand

• Unwinds the DNA molecule

• Replaces thymine with uracil

• Cuts the DNA into smaller fragments

RNA and DNA are similar in that....

• they both comprise of the 5 nitrogenous bases: adenine, thymine, cytosine, guanine, and uracil
• they are both double helixes
• they both contain ribose sugar
• they both contain a phosphate group