#Question id: 2393
#Unit 2. Cellular Organization
Where are proteins produced other than on ribosomes free in the cytosol or ribosomes attached to the endoplasmic reticulum?
#Question id: 4448
#Unit 3. Fundamental Processes
Three defined steps in a transcription cycle; choose correct one
|
1a. Closed complex |
In this form, the DNA remains double-stranded, and the enzyme is bound to one face of the helix. I |
|
1b. Open complex |
In which the DNA strands separate over a distance of 13 bp around the start site to form the transcription bubble. In the next stage of initiation, |
|
2. Promoter escape |
Incorporation of the first 10 or so ribonucleotides is a rather inefficient process, and at that stage, the enzyme often releases short transcripts and then begins synthesis again |
|
3. Initial transcribing complex. |
Once an enzyme makes a transcript longer than 10 nucleotides, it is said to have |
#Question id: 24251
#Unit 2. Cellular Organization
#Question id: 4101
#Unit 3. Fundamental Processes
In order to ensure that only fully processed mature mRNAs are allowed to be exported to cytosol, pre-mRNAs associated with snRNPs are retained in the nucleus. To demonstrate this, an experiment was performed where a gene coding a pre-mRNA with a single intron was mutated either at the 5’ or 3’ splice sites or both the splice sites.
Given below are a few possible outcomes, Choose NOT FEASIBLE OUTCOME
A. Pre-mRNA having mutation at both the splice sites will be retained in the nucleus because of the presence of bound snRNPs.
B. Pre-mRNA having mutation at both the splice sites will be exported to cytosol because of the absence of bound snRNPs.
C. Pre-mRNA mutated at either 3’ or 5’ splice sites will be retained in the nucleus because of the presence of bound snRNPs.
D. Pre-mRNA mutated at either 3’ or 5’ splice sites will be exported to cytosol because of the absence of bound snRNPs.
#Question id: 15215
#Unit 13. Methods in Biology