Q1) Which of the following statements about cDNA is incorrect? A) the full seque
ID: 3164891 • Letter: Q
Question
Q1) Which of the following statements about cDNA is incorrect?
A) the full sequence composition of a gene’s introns can be determined from that gene’s cDNA
B) cDNA can be generated by reverse transcribing mRNA
C )cDNA sequences can be used to verify protein coding genes predicted by bioinformatics tools in analyses of whole-genome sequence data
D) a comparison of cDNA to the corresponding gene in genomic DNA can help determine the boundaries between exons and introns
2Q)A negative consequence of transposable element activity for the host genome can be the mutagenic effects of new transposable element insertions. In Drosophila, the R1 and R2 LINE elements preferentially insert into the genes encoding ribosomal RNA. These genes are found in long tandem arrays on the chromosome. The preferential insertion of R1 and R2 LINE elements into these ribosomal RNA genes tends not to have a highly deleterious effect on the host because
A. ribosomal RNA genes have large promoters, and TE insertions into promoter regions is tolerated by the host
B. most ribosomal RNA genes are actually pseudogenes
C. ribosomal RNA genes consist almost entirely of introns, and TE insertions into introns is tolerated by the host
D. the long tandem arrays of ribosomal RNA genes typically consist of many copies, and insertions into some of these copies is tolerated by the host
3Q) You are annotating a region of the fruit fly genome. The bioinformatics tool you’re using identifies a potential open reading frame that is 180 bp in length. This open reading frame could potentially encode up to ____ amino acids in a row.
360
18
60
90
540
Explanation / Answer
Q.1 incorrect option is
A) the full sequence composition of a gene’s introns can be determined from that gene’s cDNA
as cDNA will only contain exon sequences.
Q.2 Ans is D. the long tandem arrays of ribosomal RNA genes typically consist of many copies, and insertions into some of these copies is tolerated by the host
Q.3 ANS IS 60
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