t-o which baitision factor6) chapenomes the flest IRNA in procaryotes? A) IFI B)
ID: 268015 • Letter: T
Question
t-o which baitision factor6) chapenomes the flest IRNA in procaryotes? A) IFI B) IF2 D) IF4 E) None of the above F) All of the above Unmethy lated strands of DNA are likely to be: 15) A) not expressed B) expressed C) readty for degradation D) ready for translation E) none of the above ID Tree-False. Write out TRUE or FALSE. NOTE: Iwill take 2 points off if you do not follow these instructioms. (2 pts) ) The Tryptophan Operon actively transcribes whenever Tryptophan is at low concentrations. 2) A negatively regulated gene is turned off when a repressor protein is bound to the DNA 3) The rRNA peptidyl transferase function attaches amino acids to each other during translation. 4) New amino acids are transported into the ribosome at the A-site during elongation 5) The tRNA transports the amino acids needed for protein translation._ 6) The P53 gene has the ability to induce apoptosis in damaged cells. 7) The Promoter is where the RNA polymerase binds on the gene during transcription. 8) RT-PCR detects mRNA expression 9) It takes more energy to melt apart GC pairs than AT pairs 10) Null mutations are alterations in the DNA of a gene, while the protein remains unchanged. 11) Okazaki fragments are found on the leading strand. 12) Formyl-methionine will be the first amino acid placed into a translated eucaryotie proteinExplanation / Answer
15. DNA methylation increases compactness and rigidity of chromatin structure thus, decreases expression.
1. True; The active expression of tryptophan operon produces tryptophan when the level of tryptophan is low
2. True; Repressor protein binds to the promoter sequence of gene and turned it off.
3. True; rRNA peptidyl transferase forms peptide bonds between amino acids during translation.
4. True; There are two sites A and P in ribosome complex. The amino acids are added from A site
5. True; tRNA transports amino acids from the cytoplasm to ribosomes during translation.
6.True; P53 gene is tumor suppressor gene which acts by inducing apoptosis in damaged cells.
7. True; RNA polymerase binds to the promoter sequence of gene to start the transcription process
8. True; Reverse-transciptase polymerase chain reaction is highly advanced technique to detect mRNA expression
9. True; GC pair contains three hydrogen bond while AT pair have only two hydrogen bonds and thus GC requires more energy to apart.
10. True; Null mutation is the change in nucleotide sequence which codes for same amino acids
11. False; Okazaki fragments are found on lagging strand.
12. True; Formyl methionine is coded by AUG which is starting codon.
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