Instructions

DNA transposons and retrotransposons are similar:

they both have poly-A segments at one end.
transposition results in movement of the original transposon to a different place in the genome, losing the previous spot.
both can encode an enzyme required for mobilization.
during transposition, both go through an RNA form that is copied back into DNA.

Enhancer DNA sequences

loose function if their nucleotide sequence is moved or inverted.
contain TATA boxes
may bind to more than one transcription factor at the same time.
only function to increase gene transcription levels above the basal level.
must be nearby the genes they regulate.
DNA transposons and retrotransposons are similar:


they both have poly-A segments at one end.


transposition results in movement of the original transposon to a different place in the genome, losing the previous spot.


both can encode an enzyme required for mobilization.


during transposition, both go through an RNA form that is copied back into DNA.
Enhancer DNA sequences


loose function if their nucleotide sequence is moved or inverted.


contain TATA boxes


may bind to more than one transcription factor at the same time.


only function to increase gene transcription levels above the basal level.


must be nearby the genes they regulate.

What process stabilizes the mRNA? O a. Addition of a 5′ cap b. Addition of a poly(A) tail to the 3′ end O c. Addition of a poly(U) tail to the 3′ end d. Both a and b add stability. e. Both a and c add stability.

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