We could say that the functional equivalent of the TATA binding protein (TBP) in prokaryotes is: Select one: a. a sigma factor protein b. a holoenzyme. c. the Rho factor. d. TFIID. e. hairpin loops.

charge Some bacterial pathogenic strains have the ability to evade the action of antibiotics. How? What could be some of the possible ways? molecu does. https://ma Турes (Select those that apply) Select one or more: People a. Bacteria is always susceptible to antibiotics and are always killed by antibiotics! Can water b. Bacteria can regulate its gene expression to produce an impermeable lipid membrane to evade antibiotics." Does a cov c. Bacteria produces a special reverse transcriptase that aids bacteria to evade Is water a n antibiotic stress. What would d. Bacteria can produce enzymes that can chemically deactivate some antibiotics. e. Bacteria can regulate its gene expression to activate certain efflux pumps to evade V antibiotics. https://sciencing What Happ Mar 13, 2018 - These molecules ( Previous page Next page https://bio.libretext 2.2A: Water's 742 MacBook Pro Q esc ! @ # $ % & 1 2 3 4 Q W E R Y tab A S D F G caps lock CO

Which of the following statements about trp operon regulation is TRUE? A. Low trp levels result in trp repressor binding. O B. High trp levels result in transcriptional antitermination. C. Low trp levels cause the ribosome to fall off at the trp codons in the upstream ORF. O D. High trp levels cause the ribosome to fall off at the trp codons in the upstream ORF. O E. Low trp levels result in transcriptional antitermination. QUESTION 34 Consider the following partial diploid for the lac operon system. lacl+ O+ lac Z+Y-A- lacls O+ 1. 2. lac Z-Y+ A+ In this configuration, which of the following statements is TRUE? A. With no lac present, ZYA will all be expressed. B. with lac present none of the genes (ZYA) will be expressed. O C. With no lac present, only YA will be expressed. D. None of these answers is correct. E. With no lac present, only Z will be expressed.

You plan to synthesize a peptide to be used as a vaccine to treat melanoma, a particularly aggressive form of skin cancer. Normally, gp100, a protein on the surface of melanocytes, activates cell growth when it is bound by its ligand. Activation of the growth pathway depends on the presence of threonine in the ligand. The effective peptide vaccine will mimic the natural ligand, but won’t cause cell growth and division. Below is the sequence of the natural ligand:   LDMKTAG   In order to ensure your newly designed peptide vaccine does not cause cell growth upon binding, you must substitute the Threonine residue at position 5. What amino acid would you replace it with, bearing in mind that the peptide should still be similar enough to bind to the gp100 protein in the surface of melanocytes. Explain your choice. Your vaccine will be administered as a topical cream, and you require your peptide to have an overall neutral charge in order to be functional. At what pH should you formulate…

Which of the following statements is true regarding transcriptional attenuation of the trp operon? a. The leader peptide encodes a protein that binds to the operator site b. Translation of the leader peptide stalls when tryptophan levels are high c. Stalling of the ribosome in region 1 of the leader peptide inhibits formation of the transcriptional terminator sequence d. This kind of mechanism can only occur in prokaryotes e. Both c. and d. are true

The amino acid at the β82 position is in the central cavity that binds 2,3-bisphosphoglycerate in the deoxygenated form of hemoglobin. How would the mutation of Lys to Asn affect the ability to bind to 2,3-BPG?   a. It would have no effect.   b. It would have decreased 2,3-BPG binding.   c. It would have increased 2,3-BPG binding.   d. It would have increased 2,3-BPG binding at least two fold.

All genes regulated by PKA contain a cis-acting DNA sequence that binds to the phosphorylated form of a transcription factor called (choose one answer)   a. CREB.   b. C-Jun.   c. beta-catenin.   d. TCF.

Which of the following is true regarding TATA associated factors (TAFs)? a. Are a part of TFIIB b. Bind to the TATA box c. Are a part of TFIID d. None of the above

Stem cells (cells with little or no determination) are useful in many kinds of biological research for which of the following reasons? Group of answer choices A. they do not have particular cell fates B. None of their DNA is methylated C. They have unique cytoplasmic determinants D. They have no microRNA E. They have not differentiated