true or false questions if a statement is false please explain why 1 in prokaryotes and eukaryot

Step 1: Prokaryotes lack internal cellular membrane-bound compartments or organelles, while euka

Question

1. In prokaryotes and eukaryotes, transcriptional attenuation is mediated by ribosomes that have stalled during translation of the nascent RNA chain. 2. Although the exon changes caused by alternative RNA splicing usually produce related proteins, there are exceptions in which two entirely different proteins are produced. 3. The P element of Drosophila transposes in germ cells but not in somatic cells because somatic cells fail to remove a particular intron from the transposase mRNA. 4. A change in the site of RNA transcript cleavage and poly-A addition can change the carboxyl terminus of a protein only by adding (or subtracting) amino acids. 5. Late in adenovirus infection, the transport of host-cell RNAs from the nucleus is blocked, so that most of the RNAs that reach the cytoplasm are encoded by the adenovirus genome. 6. The binding of iron to the iron-response element at the 5' end of ferritin mRNA increases the stability of the mRNA, thereby allowing increased numbers of ferritin molecules to be synthesized in response to increased levels of iron. 7. Eukaryotic mRNAs with unusually long 5' leader sequences containing extra AUGs may require the binding of translation-activator molecules to a translation-enhancer sequence adjacent to the appropriate AUG for initiation. 8. Since some maternal mRNAs in clam eggs are translated in vitro if stripped of their associated proteins, regulatory molecules must account for the absence of translation of some classes of maternal mRNAs in the egg. 9. Transferrin receptor mRNA stability and ferritin mRNA translatability are mediated by the same iron-sensitive RNA-binding protein; in both cases, binding of the protein to the mRNA increases the level of the encoded protein. 10. In the RNA transcripts that code for proteins in the mitochondria of trypanosomes, one or more U nucleotides are either added or removed from selected regions of a transcript, thereby altering the meaning of the message. 11. Many of the RNA-catalyzed reactions in present-day cells may represent molecular fossils – descendants of the complex network of RNA-mediated reactions that are presumed to have dominated cellular metabolism in the beginning.

1. In prokaryotes and eukaryotes, transcriptional attenuation is mediated by ribosomes that have stalled during translation of the nascent RNA chain.
2. Although the exon changes caused by alternative RNA splicing usually produce related proteins, there are exceptions in which two entirely different proteins are produced.
3. The P element of Drosophila transposes in germ cells but not in somatic cells because somatic cells fail to remove a particular intron from the transposase mRNA.
4. A change in the site of RNA transcript cleavage and poly-A addition can change the carboxyl terminus of a protein only by adding (or subtracting) amino acids.
5. Late in adenovirus infection, the transport of host-cell RNAs from the nucleus is blocked, so that most of the RNAs that reach the cytoplasm are encoded by the adenovirus genome.
6. The binding of iron to the iron-response element at the 5' end of ferritin mRNA increases the stability of the mRNA, thereby allowing increased numbers of ferritin molecules to be synthesized in response to increased levels of iron.
7. Eukaryotic mRNAs with unusually long 5' leader sequences containing extra AUGs may require the binding of translation-activator molecules to a translation-enhancer sequence adjacent to the appropriate AUG for initiation.
8. Since some maternal mRNAs in clam eggs are translated in vitro if stripped of their associated proteins, regulatory molecules must account for the absence of translation of some classes of maternal mRNAs in the egg.
9. Transferrin receptor mRNA stability and ferritin mRNA translatability are mediated by the same iron-sensitive RNA-binding protein; in both cases, binding of the protein to the mRNA increases the level of the encoded protein.
10. In the RNA transcripts that code for proteins in the mitochondria of trypanosomes, one or more U nucleotides are either added or removed from selected regions of a transcript, thereby altering the meaning of the message.
11. Many of the RNA-catalyzed reactions in present-day cells may represent molecular fossils – descendants of the complex network of RNA-mediated reactions that are presumed to have dominated cellular metabolism in the beginning.

Added by Carlos S.

Question

Please give Ace some feedback