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by BlastRoom
How a gene is copied into messenger RNA, where the copying happens, and what the message looks like when it leaves the nucleus.
#biology
20 questions
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RNA polymerase copies a gene from the DNA template strand 3'-TACCGGATA-5'. What is the messenger RNA that comes off this template?
A gene's template strand reads 3'-CGTAAGCTC-5'. Which molecule leaves the gene once the enzyme has finished working along it?
In a lab exercise, students are given the template strand 3'-AAGTCCGTA-5' and asked to write the transcript. Which answer is correct?
Given the template strand 3'-GGCTAATCA-5', a student writes the transcript as 5'-CCGATTAGT-3'. What mistake did the student make?
The coding strand of a gene reads 5'-ATGCCAGGT-3'. The enzyme uses the other strand of that gene as its template. What is the messenger RNA produced?
The RNA strand built from a gene is an exact base-for-base copy of the DNA template strand it was made from.
A gene's template strand reads 3'-ATCGGATCC-5' and is transcribed from end to end. How many uracil bases does the resulting messenger RNA contain?
A liver cell makes an RNA copy of one of its genes. In which part of the cell is that copy assembled?
A researcher tags newly built polypeptides in a human cell. Where in the cell will the tag first show up?
A human cheek cell and a bacterial cell are compared. In which one is an RNA copy of a gene built in the same compartment as the ribosomes that read it?
By what route does a finished messenger RNA molecule get out of the nucleus?
Inside the nucleus there is a dense region where ribosomal RNA is made and ribosome subunits are put together. What is that region called?
Before a gene can be copied into RNA, the enzyme first attaches to a particular base sequence lying just ahead of that gene. What is that sequence called?
The enzyme travels along the gene until it reaches a base sequence that makes it let go of the DNA and release the new RNA strand. What is that sequence called?
Which enzyme moves along one strand of an unwound gene and builds a single-stranded message from it?
A mutation changes several bases in the short sequence lying just ahead of a gene, so RNA polymerase can no longer attach there. What is the most likely result?
A researcher lines up a gene's DNA against the mature messenger RNA made from it and finds the message matches only certain segments of the gene. What are those matching segments called?
In a eukaryotic nucleus, sections of a new RNA transcript are cut out and the sections left behind are joined end to end. What is this step called?
Before a eukaryotic messenger RNA leaves the nucleus, a long chain of adenine nucleotides is added to one end of it. What is this addition called?
A gene is 6,000 base pairs long, but the mature messenger RNA that reaches a ribosome is only about 1,200 bases long. What best explains the difference?
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40 questions
