E It makes use of covalent and metal ion catalysis. The operon consists of two structural genes A and B , which code for the enzymes A-ase and B-ase, respectively, and also includes P promoter and O operator regions as shown. Kirby, Adrian Slater, Nigel W. C Transcription and translation are mechanistically coupled. E The ultimate electron acceptor in anammox is nitrite. B cleaved after the protein arrives in the nucleus.
C results from a below-normal blood glucose level. The signal sequences that direct proteins to the nucleus are: A always at the amino terminus of the targeted protein. E Promoters are not essential for gene transcription, but can increase its rate by two- to three-fold. A 1, 2, 3, 4 B 1, 2, 4, 3 C 2, 1, 4, 3 D 2, 3, 1, 4 E 3, 1, 4, 2 Ubiquitin-mediated protein degradation is a complex process, and many of the signals remain unknown. B can fine-tune the transcription of the operon in response to small changes in Trp availability. B are generally water-insoluble, whereas steroid hormones are water soluble.
Allison Gray, Youngsok Choi, Robert C. Datasupporting ourrecently proposed mechanism ofiniti- ation ofdifferentiation involving these highly phosphorylated nucleotides 7 canbeobtained bytheisolation ofmutants deficient inenzymes synthesizing either oneofthehighly. E stimulates gluconeogenesis in liver cells. We find that the SpoT protein is not bound to ribosomes or to either inner or outer membrane fractions. B Muscle cannot use fatty acids as an energy source.
D the reaction catalyzed by acetyl-CoA carboxylase. Studies on Interferon Action: Synthesis, Degradation, and Biological Activity of 2',5' -0ligoisoadenylate Concluding Remarks Low Molecular Weight Mediators of Macromolecular Synthesis—An Overview Index. Totest ourmodel onthemechanism ofinitia- tionofdifferentiation inBacillus subtilis, wetested early blocked stage 0 sporulation mutants fortheir ability tosyn- thesize highly phosphorylated nucleotides. When a certain compound X is added to the growth medium of E. C Every promoter has a different sequence, with little or no resemblance to other promoters.
When a certain compound X is added to the growth medium of E. D The internalized receptor is degraded. B It can be competitively inhibited. A Acyl intermediates are thioesters of a low molecular weight protein called acyl carrier protein. Inhibitors of photophosphorylation, 2,4-dinitrophenol, and carbonyl cyanide-m-chlorophenyl hydrazone elicited accumulation in three species of cyanobacteria when they were grown on dinitrogen or nitrate, but not in cultures grown on ammonium or glutamine.
D It exploits base pairing with internal guide sequences. Formation of the unusual nucleotide pppGpp 4. B It acts on nucleoside diphosphates. C a zinc finger structure in the protein. A Adding X to the growth medium causes a repressor protein to be released from the O region. C serine labeled at the R-group carbon.
Highly Phosphorylated Nucleotides in Eukaryotes 1. B are generally absent, except in egg and sperm cells. C It requires a source of electrons, normally ferredoxin. Which of these statements about eicosanoid synthesis is true? Elliott, The entry of sugar beet cells into the G0 state involves extensive re-programming of gene expression mechanisms via transcriptional and translational controls , Plant Science , 136 , 1 , 79 , 1998. E resolution of the Holliday intermediate. Polycarbonate purity and manufacturing cost are highly.
D no part of the molecule. Burghardt, Li-Yuan Yu-Lee, Fuller W. However, the systematic synthesis of macromolecular cages remains a great challenge. This first English edition is based on the third German edition 1975 , which is about 40% different from the first German edition 1971 , a result of rapid progress in macromolecular science and the less rapid education of the writer. The book discusses the functions and metabolism of guanosine 3',5'-bis diphosphate ; the purine nucleotides and sporulation; and the highly phosphorylated nucleotide in eukaryotes. D occur in multiple forms for each amino acid. D exchange of free alcohol with head group alcohol of phospholipid.
B All proteins are initially synthesized with methionine at their N-terminus. Which one of the following statements is true of such an operon? Which of the following is not true about the anammox reaction? We show that depletion of CgtA leads to increased ppGpp levels that correlate with induction of the global stress response and cessation of growth. D causing self-cleavage of LexA, thus inactivating its binding to operator. What is the correct order of the following events that participate in the signaling process? The text also describes the alteration of translational mechanisms, as well as 2,5-oligoadenylic acid and interferon. C glycosyl moieties containing mannose 6-phosphate residues. D their replication rate is much slower, and it would take too long with only a single origin per chromosome.
The diagram below represents a hypothetical operon in the bacterium E. A Cholesterol is the only known natural product whose biosynthesis involves isoprene units. In phototrophic bacteria light energy can be the main source of this chemical free energy. C It uses nucleoside 5'-triphosphates as substrates. C The nitrogen in the purine base that is bonded to ribose in the nucleotide is derived originally from glycine. The enzyme SpoT degrades ppGpp, and here we show that SpoT is essential in a RelA+ CgtA+ background but not in a relA deletion mutant.