45: which of these sequences regulatory may be located tens of kilobases away Ge
ID: 132497 • Letter: 4
Question
45: which of these sequences regulatory may be located tens of kilobases away Gene regulating?
A) promoter
B) enhancer
C) elements proximal
D) box Tata
E) none of the previous
46. which of the following this correlated with an increase in Gene expression?
A) methylation of histone
B) acetylation of histone
C) hydroxylation of histone
D) phosphorylation of enhancers E) hydrolysis DNA
47. which of the following is not Associated with methylation DNA in mammals?
A) mute genes
B) packing of chromatin
C) stability genome
D) inactivation chromosome X in females
E) transcript active
48. which of the following is an example of alternative splicing?
A) the Gene expression troponin T
B) regulation temporary of genes globina in animals
C) regulation space genes tubulin in plants
D) control cytoplasmic of stability mRNA
E) all previous
49. What is the mechanism of action of steroid hormones?
A) work through second messengers
B) enter the nucleus where they act as transcription factors
C) bind to control molecules in the cytoplasm
D) direct communication with adjacent cells
E) activate the shock proteins.
50. Ignacio is analyzing the DNA from a group of eukaryotic organisms and found regions of highly methylated nucleotides; the most likely explanation for this finding is:
A) are regulatory regions
B) is associated with transcriptional repression
C) are areas of induction by catabolite
D) are areas that are transcribed, but not translated
E) are receptors for hormones
1. in an alopoliploid organism, which of the following alternatives is true about the fertility of hybrids?
A) Inter-specific hybrids are fertile due to the homology of the chromosomes
B) The doubling of the number of crosomoses and the non-disyuncion in the gametocytes can lead to the mating of homologous chromosomes, disyuncion and fertile hybrids
C) The inter-specific hybrids will be fertile until there are an even number of chromosomes in their descendants
D)the non-mitotic disjunction results in haploid cells
E) the non-disyuncion meitotica produces three haploid gametes
2.What type of chromosomal breakage results in such a small deletion that it can not be identified in a karyotype?
A) centric deletion
B) microdelecion
C) Partial decision
D) terminal termination
E) Interstitial detection
3. What type of chromosomal breakage results in such a small deletion that it can not be identified in a karyotype
A) centric deletion
B) microdelecion
C) Partial decision
D) terminal termination
E) Interstitial detection
4. a region of a chromosome that contains the centromere is broken and reattached in the opposite direction. this is an example of which chromosomal defect?
A) Paracentric.inversion
B) Pericentric inversion
C) Pericentrictranslocation
D) dicentric investment
E) dicentric translocation
5. a chromosome breaks, and a piece of a chromosome translocates to a non-homologous chromosome. this is an example of which chromosomal alteration?
A) inversion par centrica
B) Decentric bridge
C) unbalanced translocation
D) Robertsonian translocation
E) investment link
Explanation / Answer
45. B ENHANCER
46. B ACETYLATION OF HISTONES
METHYLATION DECREASES GENE EXPRESSION
47. E TRANSCRIPT ACTIVE
49. THEY ENTER THE CELLS THROUGH PLASMA MEMBRANE. SO ANSWER WILL BE B.
50. ARE REGULATORY REGIONS.
METHYLATION IS A WAY OF REGULATING GENE EXPRESSION.
4. A PERICENTRIC
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.