Biology- DNA to Protein Test

The “rungs” of the DNA ladder are held together by _____.

• covalent bonds

• hydrogen bonds

• helium bonds

• van der waals forces

Chargraff’s rule states that in a double stranded DNA molecule _____.

• A=G

• A=T

• C=T

• C=A

Which of the following nucleotides does not exist in a molecule of DNA?

• Guanine

• Adenine

• Cytosine

• Thymine

• Uracil

The anticodon is an important structural component of _____.

• mRNA

• tRNA

• rRNA

• nRNA

Watson and Crick are credited with determining _____.

• The structure of DNA as a single helix

• The structure of DNA as a double helix

• The structure of DNA as a triple helix

• DNA does not exist

The “rails” or the “backbone” of a molecule of DNA are made up of ___.

• nitrogenous bases

• deoxyribose (sugar) and phosphates

• glucose and phosphates

• hydrogen and phosphates

The ____ enzyme adds DNA nucleotides.

• RNA polymerase

• DNA polymerase

• Helicase

• Hexokinase

What does semi-conservative mean in DNA replication?

• Both strands are used as template strands to create new strands of DNA.

• Only one strand is used as a template to create a new strand of DNA.

• Neither strand is used as a template to create a new strand of DNA.

What is the difference between prokaryotic and eukaryotic DNA?

• Prokaryotic DNA are linear

• Eukaryotic DNA are circular

• Prokaryotic DNA are circular

• There is no difference between the two

Where does transcription occur?

• Ribosomes

• Cytoplasm

• Cell membrane

• Nucleus