Unit 5 Test: DNA, Protein Synthesis & Mutations

Which of the following would NOT be a difference between DNA and RNA?

• RNA contains the sugar ribose; DNA contains the sugar deoxyribose

• RNA is single stranded; DNA is double stranded

• RNA has the nitrogenous base uracil; DNA has the nitrogenous base thymine

• RNA contains the sugar deoxyribose; DNA contains the sugar ribose

A purine has two carbon fused rings. Which of the following would be considered purines?

• adenine

• guanine

• cytosine

• A & B

According to Figure 5-1, structure “X” would be considered which of the following nitrogenous bases?

• adenine

• thymine

• guanine

• cytosine

According to Figure 5-1, structure “Y” would be considered which of the following nitrogenous bases?

• adenine

• thymine

• cytosine

• guanine

Tags

NGSS.HS-LS1-1

According to Figure 5-1, which of the following would make up “Z” or the backbone of the DNA molecule?

• deoxyribose and the nitrogenous base

• ribose and the nitrogenous base

• deoxyribose and phosphate group

• ribose and phosphate group

How many hydrogen bonds form between adenine and thymine?

• 1

• 2

• 3

• 4

How many hydrogen bonds form between guanine and cytosine?

• 1

• 2

• 3

• 4

During DNA replication, the enzyme involved in unzipping the DNA is

• DNA helicase

• DNA polymerase

• RNA polymerase

• Topoisomerase

During DNA replication, the enzyme that prevents DNA from getting tangled is

• DNA helicase

• DNA polymerase

• RNA polymerase

• topoisomerase

What molecule is shown in the figure above as "A", which makes up the ribosome?

• tRNA

• rRNA

• mRNA

• DNA