Describe the four types of long noncoding RNAs (lncRNA)
What will be an ideal response?
(1 ) Antisense lncRNA partially overlap protein-coding genes and are transcribed in the opposite direction of the protein-coding gene. (2 ) Intronic lncRNA genes are located within introns, and their transcription does not overlap with the adjacent exon. (3 ) Bidirectional lncRNA genes use the promoter of a protein-coding gene but are transcribed in the opposite direction. (4 ) Intergenic lncRNA genes are discrete transcription units located outside the protein-coding region.
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Transcription factors function to help move ribosomes along the mRNA
Indicate whether the statement is true or false
What evidence suggests that the large amount of excess "junk" DNA in a genome may serve an important function?
A. All organisms have excess "junk" DNA. B. A portion of "junk" DNA is highly conserved in its DNA sequence among many different eukaryotic species. C. The nucleotide sequence of "junk" DNA is very similar to that of genes involved in important cell functions. D. The sheer quantity of "junk" DNA suggests it must have some function in the life of the organism. E. Deletions or mutations that fall within "junk" DNA tend to always be harmful to the organism.
RNAs interpret the code in DNA and use those instructions to synthesize proteins. RNA work mainly in the ______, while DNA remains in the ________.
Fill in the blank(s) with the appropriate word(s).
Which of these is not a type of water pollutant?
a. dissolved oxygen. b. toxic chemicals. c. organic wastes. d. sediment.