Question 18 The presence of an open reading frame motif suggests that the sequen

Question

Question 18

The presence of an open reading frame motif suggests that the sequence is also:

question 19

If a researcher were to find a hairpin motif in a particular DNA sequence, what would that suggest about the sequence?

The sequence is a likely site for the binding of transcription factors

Which of the following properties of transposable elements allows them to contribute to the C-value paradox?

Question 22

Which of the below contributes to the C-value paradox?

differences in the amount of highly repetitive DNA sequences among organisms

differences in the amount of non-coding DNA among organisms

differences in the amount of moderately repetitive DNA sequences among organisms

all of these

Explanation / Answer

(18).

     An open reading frame is the long strand of nucleotides and when they are transcribed in to m RNA, it codes for proteins. Presence of ORF motifs indicates that the DNA has potential to protein coding. Hence, the presence of an open reading frame motif suggests that the sequence is also: A sequence that codes for transfer RNA.

(19).

     Hairpin motif is a simple protein structural motif and it is look like a hairpin. Researchers found that the isolated hairpin motifs from a short peptide chains in an aqueous solution suggests that hairpins could form nucleation sites for protein folding. Hence, hairpin motif in a particular DNA sequence is most likely a protein coding region.

(20).

       The elements which have the capacity to change their position itself within a genome are called transposable elements. They are the primary explanation of C-value paradox. Copies of transposable elements can appear on multiple chromosomes is the best property of transposable elements allowing them to contribute to the C-value paradox.

(22).

       C-value paradox refers to the disconnect between genome size and the complexity of the organism. C- Value is the amount of DNA present in a reproductive cell. In some species the amount of non-coding DNA Increases enormously which contributes to the C- value paradox.

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