Question

Transposons 1. Encode a transposase 2. Generate direct repeats in recipient DNA when inserted via cut and paste mechanism 3. Have inverted repeats at their ends. 1 and 3 All answers are correct 1 2 The CTD tail of RNA polymerase ll: 1. Is phosphorylated on serines by TFIIH 2. Contains repeats of amino acids 3. Serves as a scaffold for the factors involved in transcription and processing of the RNA molecule All are correct Both 1 and 2 are correct Which of the following statements regarding RNA splicing in animals is true U4 SnRNA base pairs with Us RNA to prevent from catalyzing the removal of the introns until U6 RNA has complexed with U2 SRNA None of the answers are correct requires base pairing between U1 s RNA and the 'solice site in the hoRNA All of these options are correct U6 SnRNA catalyzes the remove of the intron Why would changes in the genes for transcription factors be expected to generate major phenotypic differences? They are extremely powerful genes. They can affect the expression of small numbers of other genes. Their gene products are remarkably stable. Their gene products normally denature more rapidly than other gene products. They can affect the expression of large numbers of other senes.

Answer 1

# All answers are correct.

Transposons code for the enzyme transposase. This is important for the excision and insertion. Two inverted tandem repeats flank the transposons. Transposase generates a direct repeat while cutting and pasting the transposable element at the traget site.