Ans 17:- (A) Gene Expression.
Explanation:- The process by which the information present in the gene is used to produce the functional gene product is called the Gene expression, the gene products are proteins which are used by the body for various functions in some genes the information is converted to transfer RNA called tRNA.
Ans 18:- (C) Pattern of chemical modification of the histone tails.
Explanation:- histone code is defined as the set of histone modification that dictates whether the chromatin is open or closed it occurs on the tails. Histone code can control Gene Expression.
Histone code and their regulatory functions.
H4 K8 acetylation, H3 K14 acetylation, H3 S10 phosphorylation = transcription
H3 K9 trimethylation, NO H3 or H4 acetylation = transcriptional repression
H4 K4 acetylation H4 K12 acetylation = histone deposition at S-phase
H2A S1 phosphorylation, H2A T119 phosphorylation, H3 T3 phosphorylation, H3 S10 phosphorylaton, H3 S28 phosphorylation = condensed mitotic chromatin.
Ans 19:- (D) Imprinting.
Explanation:- Imprinting is defined as an epigenetic phenomenon that causes the genes to get express in a parent of origin-specific manner. In very simple language to make it understand we know offspring inherit two copies of genes from their parents i.e, one from mother and one from father however in usual case both genes are active whereas in some cases only one of the two copies are activated or expressed so which copy is switched on will depend on parent of origin, either from father or mother this process is called Imprinting.
Ans 20:- (A) a stretch of nucleotides with many C bases adjacent to G bases in a small region near or in the promoter site of a gene.
Explanation:- CpG in mammalian genomes are typically 300-3000 bp in length and have been found in or near approximately 40% of promoters of mammalian genes.
onaformation from a ee is used in the synthesisof 17 functional gene product. A) Geno B)...
11. A gene is best defined as a. A segment of DNA b. Three nucleotides that code for an amino acid. C. A sequence of nucleotides in DNA that codes for a functional product. d. A sequence of nucleotides in RNA that codes for a functional product. e. A transcribed unit of DNA. 12. Which of the following statements is false? a. DNA polymerase joins nucleotides in one direction only. b. The leading strand of DNA is made continuously c....
If the two genes are unlinked, an organism with the genotype of AaBb can produce gametes containing either Aa or Bb. AB, Ab, aB, or ab. AaBb. AB or ab. none of the abov Which of the following is NOT correct about miRNA? It is involved with posttranscriptional regulation in eukaryotes. It leads to one type of RNA interference. Its name is derived from “mitochondrial RNA.” It binds to a complementary mRNA sequence. It is found in many different organisms,...
Which of the following are methods employed by cells to control gene expression? (hint: select all options that apply) Multiple answers: You can select more than one option O A Chromatin remodeling B Histone acetylation O c DNA methylation
In prokaryotes the consensus sequence begins. is located about 10 bases upstream from the initiation site. It has the and is responsible for identifying the precise nucleotide at which TATA box, TATAAA, transcription Pribnow box, TATAAT, transcription 0 0 0 0 0 Pribnow box, TATAAT, translation Pribnow bow, TTGACA, translation None of the answers are correct Ribosomes are made of: 1. rRNA 2. proteins 3. URNA 3 2 Both 1 and 2 are correct All answers are correct 1 Once...
The Law of independent assortment states that A diploid organism's three alleles for a gene separate from one another during gamete formation Segregation of an allelic pair for one trait has no effect on segregation of alleles for another trait. none of the answers listed An organism's two alleles for a gene separate from one another during gamete formation. Segregation of an allelic pair for one trait has a great effect on segregation of alleles for another trait Nucleosomes that...
Q1)Which of the following is not involved in control of gene expression in eukaryotes? A. Change to DNA sequence. B. Alternative splicing. C. Export of mRNA from the nucleus. D. Transcriptional repression. E. Destruction of mRNA Q2) Trans-acting regulators of gene expression include? A. promoters. B. histone deacetylases C. introns D. silencers E. the TATA box. Q3) Gene regulation in eukaryotes often involves which of the following, which are not also used by prokaryotes? A.RNA polymerase B.Transcription factors C.Histone modification...
need to know if correct 44 F Nonsense-mediated mRNA decay refers to the degradation of introns after splicing 45. Exon skipping and cryptic splice-site selection are two types of splicing errors. 46. Transcription activators can promote nucleosome remodeling by recruiting histone modifying enzymes. 47. RNA polymerase Il terminates transcription precisely at the AAUAAA 48. During protein translation, Kozak consensus sequences are required for termination 49. In regards to transcription, DNA tooping refers to the removal of DNA looped around histone...
Genetics Worksheet Week 3: Gene Regulation and Epigenetics 1. Duchenne muscular dystrophy is caused by a mutation in a gene that is 2.5 million nucleotides in length and encodes a protein called dystrophin. The dystrophin protein itself is 3684 amino acids in length. Calculate below the approximate size of the mRNA that encodes dystrophin. Approximately what percentage of the gene that encodes dystrophin is intron sequence? The human genome encodes a much greater variety and number of proteins than the...
4. Telomerases... a) are RNA-containing enzymes involved in replicating the ends of linear chromosomes b) cause aging in cells c) are structures located at the ends of eukaryotic chromosomes d) are needed by bacteria to complete synthesis of their chromosome ends e) are needed by bacteria to supercoil DNA 5. DNA methylation a) Modifies bases of tRNA molecules, allowing wobble b) Alters the activity of DNA polymerase by affecting access to the DNA c) Is a modification of histone tails...
molecular biology 16. Histone acetyltransferases would be directly involved in which of the following? A. Formation of open chromatin B. Movement of the nucleosome C. Acetylation of lysines D. Termination of gene expression E. All of the above are true. 17. What functions are accomplished by the primosome? A. Tracking along DNA B. Tracking along DNA, separating double-stranded DNA C. Tracking along DNA, separating double-stranded DNA, synthesizing RNA primers D. Tracking along DNA, separating double-stranded DNA, synthesizing RNA primers, adding...