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In the context of genetics, the term "expression" refers to:
a. characteristics that are inherited.

b. the way a cell makes mRNA transcript of a gene

c. how a cell looks

d. the way a cell makes a copy of a gene within DNA

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Bunny Greenfelder
Bunny GreenfelderLv2
28 Sep 2019

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Related questions

In Xenopus 4,000 cell blastula embryos, cells transcribe the whittled (Wtl) gene. In all cells the same primary RNA is transcript can be found in cell nuclei, in fact this transcript is processed to produce the same mRNA in all cells. However in the animal cap cells, there is 10 fold less mRNA than in vegetal cells, resulting in production of more whittled protein in vegetal cells. How is whittled gene expression controlled? Transcriptional, post-transcriptional, translational, or post-translational level. For the level that you choose, be as specific as possible and describe one mechanism that could be operating at this level.

When we use DNA to code for a protein, we call the process Transcription and Translation. Below are descriptions of processes that happen when we use DNA to code for a protein. Match the description of each process with the correct term - either Transcription or Translation.

1.A ribosome reads the mRNA and builds a protein from amino acids.
2.A copy is made of a gene in RNA
3.The primary transcript is modified: introns are removed and the transcript gets a cap and a tail
4.tRNA carries amino acids to a ribosome
5.The DNA unwinds, exposing the gene to be copied.

1. How can scientists use the CRISPR/Cas9 system used to mutate a gene? (Choose ALL correct answers)

[] Cas9 and the RNA it binds to can be put into cells by scientists in order to induce breaks at specific DNA sequences
[] once the DNA is cut, repair mechanisms of the cell can make changes to the DNA at that specific site
[] Cas9 binds with the transcribed mRNA from the gene and interferes with translation so that the protein is never produced
[] Cas9 can bind to the promoter of the gene to change the frequency of gene transcription

2. Which of the following are features of the CRISPR/Cas9 system? (Choose ALL correct answers)

[] Cas9 uses RNA to find matching sequences of DNA
[] Cas9 makes double-stranded breaks in specific sequences of DNA
[] Cas9 makes random double-stranded breaks in DNA
[] Cas9 makes breaks in RNA that are targeted and specific

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