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Lecture 7 Transcription from DNA to mRNA questions fully solved & updated(100- accuracy).
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Lecture 7 Transcription from DNA to mRNA questions fully solved & updated(100- accuracy).
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Lecture 7 Transcription: fromDNA to mRNA questions fully
solved & updated(100%
accuracy)
What percent of the human DNA is considered "coding" DNA which can
make proteins? - answer 2%
-Only 2% if performed central dogma!
-98% is junk (aka noncoding)
-We have the most junk of any species
-Introns are the junk inside genes--> they are cut out and always between
exons (coding)
At what chromosomal location will RNA polymerase begin coping mRNA
from DNA? - answer Promoter
What is considered "junk" DNA? - answer Telomeres and introns
-Do not control any hereditary traits
-Have a function
-Telomeres are at the tips of chromosomes, and are chopped off every time
DNA replication occurs
--> Used to count how old the cell is/how many divisions it has done
What does splicing help with? - answer Move exons around and create
more than one protein from a gene sequence
, What are the differences between transcription and DNA replication? -
answer Transcription gives cells different purposes
-Turning a gene "on"
-Can be turned on at any time, but turned on by signal
DNA replication only happens in S phase
-Copy entire chromosome (x46)
What are the steps of transcription? - answer 1. Initiation
-Response to a signal
-Promoter is the region that lets this happen
2. Elongation
3. Termination
-What genes are turned on and off is very specific
What is the molecular function of DNA? - answer "Blueprints for making
proteins"
Transcription: DNA --> mRNA & Translation: mRNA --> Protein
DNA--> Transcription--> mRNA--> Translation--> Protein
-Proteins do everything in your body, and genes are making those
-mRNA is like the grocery list (transcription)
-Translation puts the ingredients together
-Changes can be small or catastrophic
How much of the DNA in human chromosomes makes up gene fragments
that will become part of a final protein or RNA product? - answer Less than
2%
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