AP Biology DNA

bonds connect nucleotides lengthwise in DNA strands

• Covalent

• Ionic

• Hydrogen

• Metallic

Nucleotides are connected lengthwise in DNA strands via covalent bonds between _

• The phosphate group of one nucleotide and the deoxyribose sugar of the next

• The phosphate group of one nucleotide and the phosphate group of the next

• The deoxyribose sugar of one nucleotide and the deoxyribose sugar of the next

• The nitrogenous base of one nucleotide and the deoxyribose sugar of the next

• The nitrogenous base of one nucleotide and the nitrogenous base of the next

The 2 strands of nucleotides in a DNA double helix are oriented ('run') in opposite directions. What term describes this structural characteristic?

• Antiparallel

• Parallel

Which numbers denote the opposite ends of a nucleotide strand in a DNA molecule?

• 5' and 3'

• 1' and 2'

• 1' and 3'

• 2' and 5'

One strand in DNA runs 5'--> 3'. Its opposite strand runs _

• Also 5'--> 3'

• 3' --> 5'

• North to South

• East to West

DNA replication creates two strands of DNA from one. If pink is parental DNA and blue is new DNA - which picture demonstrates the accepted model of DNA replication after the SECOND replication cycle?

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Tags

NGSS.HS-LS3-2

What is the name of this enzyme?

• DNA Helicase

• DNA Ligase

• DNA polyermase

• RNA Polymerase

Tags

NGSS.HS-LS1-1

Which is the last step of DNA replication?

• RNA Helicase unwinds original DNA strand

• DNA Primase lays down RNA primer for new nucleotide bases.

• RNA polymerase builds new strands by bring in new nucleotide bases.

• Ligase knits together fragments on lagging strand

Which letter in the picture below depicts the leading strand in DNA replication?

• A

• C

• B

• None of the above

Which letter in the picture below depicts the lagging strand in DNA replication?

• Letter A since it is copied from 5' to 3'

• Letter A since it is copied from 3' to 5'

• Letter B since it is copied from 3' to 5

• Letter B since it is copied from 5' to 3'