Quiz 23: Transposition
Which of the following would probably not be a characteristic of the Tn3 transposon? A)inverted repeat sequences B)antibiotic resistance gene(s) C)resolvase gene D)transposase gene E)ori t site
Barbara McClintock discovered the first eukaryotic transposable element in A)fruit flies. B)nematodes. C)maize. D)fungi. E)peas.
The Ds transposable element of maize cannot transpose on its own because it lacks A)transposase. B)inverted repeats. C)origin of replication. D)antibiotic resistance. E)Tn10.
Hybrid dysgenesis refers to the fact that in Drosophila a cross between a P male and an M female produce offspring that are A)dead. B)wingless. C)blind. D)sterile. E)hairless.
In order for P element transfer to happen in Drosophila which of the following situations must occur? A)a P crossed with a P female B)a P male crossed with an M female C)an M male crosses with a P female D)an M male crossed with an M female E)any male crossed with a P female
Which of the following is not true concerning immunoglobulin gene recombination signal sequences? A)There is a conserved heptamer. B)There is a conserved nonamer. C)The conserved sequences are separated by a nonconserved sequence of either a 12 bp or a 23 bp sequence. D)Recombination occurs between a 12 bp signal and a 23 bp signal. E)Recombination only occurs between two heptamers.
Which of the following molecules serves as a primer for reverse transcriptase during retroviral replication? A)host snRNA B)viral RNA C)host tRNA D)viral DNA E)host DNA
Which of the following is not necessary for retroviral insertion into the host genome? A)RNA polymerase II B)retroviral pol gene C)viral protease D)RNase H E)reverse transcriptase
Which of the following has no reverse transcriptase gene associated with it? A)HIV B)Ty C)copia D)L1 E)Tn3
Which of the following transposons does not contain LTRs or inverted repeats at its ends? A)Ty B)Alu elements C)copia D)Tn3 E)Ds
Transposable elements or _________ are DNA fragments that can move from one organism to another.
Bacterial insertion sequences are the simplest of transposons and contain only short inverted repeat ends and genes for ___________.
In ____________transposition both strands of the original DNA move together whereas in _________ transposition one copy of the DNA moves to a new site while one copy stays in the genome.
__________ receptor genes undergo rearrangement in a manor similar to B-cell immunoglobulin genes.
Individuals with SCID,severe combined immunodeficiency disease,have defective ________ genes,which cause loss of B-cell and T-cell function.
Insertion of a Group II intron of a particular gene into an intronless version of that same gene is called_______.
There are two transposable elements,Ds and Ac,which are necessary for variegation in maize kernel color.
A Drosophila P female contains the P transposition repressor that prevents hybrid dysgenesis from occurring.
Rearrangement of mammalian cell immunoglobulin genes is responsible for the large diversity of antibodies produced by B-cells.
Group II introns are non-LTR retrotransposons that are found only in bacterial cells.