Caloric restriction activates what and enhances what? Mammalian genomes are forecasted to encode _______ unique microRNA that regulates expression of at least _________ of all genes.

Caloric restriction activates what and enhances what? Mammalian genomes are forecasted to encode _ unique microRNA that regulates expression of at least ___ of all genes.

Name: Caloric restriction activates what and enhances what? Mammalian genom
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Description: Caloric restriction activates what and enhances what? Mammalian genomes are forecasted to encode _______ unique microRNA that regulates expression of at least _________ of all genes.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter10: Biotechnology

Section: Chapter Questions

Problem 3DID

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Similar questions

What if there was a mutation in the operator region of the lac operon and the active repressor could not bind there? How would this affect the cell’s production of β–galactosidase?In general, Histone acetylation makes DNA ___________________, while DNA methylation makes DNA ________________.
When referring to attenuation in the regulation of the trp operon it would be safe to say that, when there are high levels of tryptophan available to the organism, ________. tryptophan inactivates the repressor protein translation termination of the trp operon is likely the trp operon is transcribed at relatively high levels the ribosomes stall during translation of the attenuator region transcription termination at the attenuator region is likely
The process in which the two-dimensional structure of RNA from the L region of an operon can either prevent or allow transcription of the structural genes is called _____________. Group of answer choices Activation Co-repression Induction Attenuation Repression
If tryptophan is presence in the culture media of E.coli then _________. the promoter will be accessed by the RNA polymerase the repressor will bind to the operator the structural genes of the trp operon will be expressed tryptophan will be synthesized
Lactose intolerant individuals do not produce the enzyme lactase. Studies show that the gene that encodes lactase is not transcribed. This gene is most likely associated with nucleosomes that are ______________ which can be caused by histone Uncondensed; acetylation Uncondensed; deacetylation Condensed; acetylation Condensed; deacetylation Uncondensed; methylation
Regarding the trp operon: when levels of tryptophan are low, the ___ hairpin forms, resulting in _____ of transcription. Group of answer choices 2-3; termination 3-4; termination 3-4; continuation 2-3; continuation
The following statements may be either true or false. Please circle your answer. True / False RNAi-silencing occurs only in C. elegans but not in other organisms. True / False The same gene can be silenced by degradation of its mRNA in a parental animal, and by methylation of its DNA locus in the progeny. True / False Drosha and Pasha bind to mRNAs allowing the 43S subunit to form, but they inhibit the formation of the 80S subunit. True / False Injection of GFP-dsRNA into a C. elegans will activate the RISC complex and lead to the degradation of let-7 mRNA. True / False Nuclear GFP fluorescence was used in most experiments because RNAi- silencing occurs in the nucleus and not in the cytoplasm.
Use the blanks on the left hand side to put the following statements in order (use numbers or letters to designate the order). All of the statements refer to the diauxic (sequential) growth of a bacterium on the carbon substrates glucose and lactose (see textbook Fig 4.11 on diauxic growth). Remember, the lac operon contains the genes necessary for the lactose catabolism. The glucose substrate is completely consumed, at which time the repressor protein on the lac operon unbinds from the DNA molecule. The lactose substrate is catabolized by the active B-galactosidase enzyme. Glucose, as the preferred carbon substrate, is first consumed by catabolic enzymes that are constitutive (always present). After completion of translation, the B-galactosidase enzyme undergoes folding to form into an active enzyme that can breakdown lactose into its constituent monosaccharides. The messenger RNA code from the lac operon is translated by ribosomal RNAS to form lac-related enzymes, such as…
In the lac operon, the product of structural gene lacZ is capable of ________. producing zinc finger nucleases transporting lactose into the cell repressing the lactose operon forming lactose from lactose precursors cleaving the lactose disaccharide into glucose and galactose
Consider the trp operon found in E. coli. You have discovered a mutant strain of E.coli that contains a mutation in its trpR gene. This mutation prevents the trpR protein from binding to its small effector molecule. What would happen if both the wild type and mutant bacteria were put in an environment that contained lots of tryptophan? The normal (wild type) bacteria would have (i)________expression of the trp operon while the mutant bacteria would have (ii) _________ expression of the trp operon. A) (i) high (ii) high B) (i) low (ii) low C) (i) high (ii) low D) (i) low (ii) high
In addition to observing similarities to the lac operon, you also notice that this gene is regulated via attenuation, similar to the trp operon. Based on this similarity to this model operon, you could state that ___________. Group of answer choices If a terminator loop forms in the DNA, the expression of the structural genes is halted. The formation of the terminator hairpin followed by a series of Uracil (UUUUUUU) functions similar to Rho-Independent termination to result in the stopping of transcription. The transcription of a leader sequence affects the translation of the structural genes. Never mind – all of these statements are true! Attenuation will be the primary means of transcriptional regulation, with a repressor used as a back up option.
Assuming that the level of glucose is low, a mutation in the repressor associated with the lac operon of E. coli which prevents binding of the repressor to lactose should result in_____ Constitutive expression of the lac operon genes ito sagot ko Lack of expression or reduced expression of the lac operon genes under all circumstances Expression of the genes only when lactose is present Expression of the genes only when lactose is absent