AP Biology Unit 6 Gene Expression

Which of the following statements is true about stem cells?

• Stem cells can differentiate into specialized cells

• Stem cells are found only in bone marrow.

Tags

NGSS.HS-LS1-4

Which enzyme was used to produce the molecule in the Figure?

• ligase

• a restriction enzyme

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NGSS.HS-LS1-1

What is the enzymatic function of restriction enzymes?

• to cleave nucleic acids at specific sites

• to add new nucleotides to the growing strand of DNA

Bacteria containing recombinant plasmids are often identified by which process?

• exposing the bacteria to an antibiotic that kills cells lacking the resistant plasmid

• producing antibodies specific for each bacterium containing a recombinant plasmid

A principal problem with inserting an unmodified mammalian gene into a bacterial plasmid, and then getting that gene expressed in bacteria, is that

• prokaryotes use a different genetic code from that of eukaryotes.

• bacteria cannot remove eukaryotic introns.

Restriction fragments of DNA are typically separated from one another by which process?

• gel electrophoresis

• PCR

The segment of DNA shown in the figure has restriction sites I and II, which create restriction fragments A, B, and C. Which of the gels produced by electrophoresis shown below best represents the separation and identity of these fragments?

• 
• 

Which of the following describes chromatin?

• DNA nucleosomes wrapped around histone proteins

• Condensed DNA prepared for cell division

• Complimentary RNA coding of primary DNA

• Unpackaged DNA that is loose and always accessible

Which of the following is true of DNA Replication?

• DNA is semi conservative because it creates two new strands of old nucleotide.

• New DNA strands are being synthesized in the 5' to 3' direction

• DNA is being synthesized in the 3' to 5' directions from a template strand

• RNA is being synthesized by RNA polymerase in the 5' to 3' direction

• A sense strand is created from a nonsense strand of DNA using RNA polymerase

The following mutation occurs:

5' TAC GGC CGA AGT CGT 3'

becomes

5' TAC GGC CGA ATT CGT 3'

What type of mutation is this?

• sense

• nonsense

• frameshift

• translocation

• duplication

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NGSS.HS-LS3-2