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Approximately 45 percent of the human genome is derived from transposable elements, such as LINES and SINES. What are LINES and SINES and why are there so many copies in genome? Could this have something to do with the mechanism of transposition? What is this mechanism?

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Elin Hessel
Elin HesselLv2
3 Aug 2019

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Related questions

It was noted that at least 45 percent of the human genome is derived from transposable elements. The actual number could be much higher, but it is impossible to make a determination about the origin of many other sequences. Why do you suppose it is difficult to make assignments about the origin of many of the sequences in the human genome?

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_______________ are transposable elements that move within the genome by being copied and reinserted as DNA sequences, avoiding the need for reverse transcription"

A.

Retrotransposons
B

Retrovirus-like elements
C

DNA transposons
D

Satellite DNAs
E

Long interspersed elements (LINEs)

F.Short interspersed elements (SINEs)

The large differences observed in genomic size among eukaryotes correspond primarily to differences in

A

the amount of protein-coding genes
B

the amount of noncoding DNA
C

the biological complexity of the organisms at hand
D

the length of the telomeres

E the size of the centromere

The study of lncRNAs has revealed

A

that protein-coding genes are distributed homogeneously throughout the genome
B

that splicing regulates more genes than initially expected
C

that miRNAs are mostly limited to intronic sequences
D

that only a relatively small fraction of the human genome is ever transcribed
E

the existence of genomic regions coding exclusively for rRNA and tRNA
F

that extensive regions of our genome are in fact actively transcribed even though they do not contain protein-coding genes

28. Which two of the following statements is NOT true?

A) Eukaryotes have larger genomes and more genes than prokaryotes

B) Multicellular eukaryotes have larger genomes and more genes than single celled eukaryotes

C) Genes derived from both bacteria and archaea can be found in eukaryote genomes

D) Most eukaryotic genomic DNA is packaged into linear chromosomes

E) Mitochondrial genomes of eukaryotes are circular .

F) They include LINES, SINES, and Alu elements

G) They can cause mutations

H) Transposons are associated with genetic diseases

I) Transposon movement is restricted to meiosis

J) Special repeated elements found in the telomeres are beneficial to humans

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