DNA and Protein Synthesis

What type of bond holds the DNA strands together?

• hydrogen

• ionic

• nonpolar covalent

• polar covalent

How are the DNA strands arranged?

• parallel

• anti-parallel

• perpendicular

• irregularly

What end does DNA polymerase add the nucleotides to (new strand)?

• 5'

• 3'

• both 3' and 5'

• the end with the phosphate

What molecules make up the backbone of DNA?

• nucleotides and phosphates

• nucleotides and sugars

• sugars and nucleotides

• sugars and phosphates

Why is DNA replication considered to be semi-conservative?

• the parental strands are conserved in one of the new DNA molecules

• each new strand contains a parental strand and a new daughter strand

• nucleotides are conserved on the leading strand

• nucleotides are conserved on the lagging strand

What are telomeres?

• extra DNA at the ends of chromosomes that code for proteins

• DNA that gets longer with every round of replication

• Repeating segments of DNA that get shorter with every round of replication

• DNA sequences that are cut out by the spliceosome

Tags

NGSS.HS-LS1-4

NGSS.HS-LS3-2

Which of the following is NOT associated with Okazaki fragments?

• RNA polymerase

• DNA ligase

• primase

• DNA polymerase

Which portions of mRNA are cut out because they do not code for proteins?

• codons

• anticodons

• introns

• exons

What does the enzyme telomerase do?

• Adds extra DNA

• Adds proteins

• Adds primers

• Adds phosphates

Tags

NGSS.HS-LS1-4

Which of the following are needed for translation?

• mRNA

• tRNA

• rRNA

• codons and anticodons