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TLS Online TPP Program

#Question id: 19026

Consider the ABO “blood type” gene. This single gene has three alleles called A, B, and O. There are four resultant “blood types” (phenotypic classes), as follows:
                             
Assume Hardy-Weinberg equilibrium, the frequencies of the A and B alleles are 0.26 and 0.07, respectively. You now examine the ABO blood types in yet another population. You observe that the AB blood type has a frequency of 0.50 in this population. What are the frequencies of the A and O alleles in this population?

#Unit 8. Inheritance Biology
  1. Frequency of the A allele = p = 0.5      
    Frequency of the O allele = r = 0
  2. Frequency of the A allele = p = 0.5      
    Frequency of the O allele = r = 0
  3. Frequency of the A allele = p = 0.5      
    Frequency of the O allele = r = 0
  4. Frequency of the A allele = p = 0.5      
    Frequency of the O allele = r = 0
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TLS Online TPP Program

#Question id: 26568

#Unit 3. Fundamental Processes

Hp1 oligomerisation tales place by
TLS Online TPP Program

#Question id: 26569

#Unit 3. Fundamental Processes

Which of the following statement is correct
a.Methylation of H3K9 demarcates heterochromatin 
b.H3K4 methylation demarcates heterochromatin 
c.H3K4 methylation demarcates euchromatin
d.Methylation of H3K9 demarcates euchromatin
TLS Online TPP Program

#Question id: 26570

#Unit 3. Fundamental Processes

Which of the following is responsible for the deacetylation of histone
TLS Online TPP Program

#Question id: 26571

#Unit 3. Fundamental Processes

Which of the following is required to initiate modifications of histone H3 (deacetylation of K9 and K14, followed by methylation of K9) in human
TLS Online TPP Program

#Question id: 26572

#Unit 3. Fundamental Processes

Choose the following is incorrect statement about Polycomb or Pc-G proteins

a. Pc-G proteins do not initiate repression

b. Pc-G proteins initiate repression

c. They are responsible for maintainingrepression 

d. There are Polycomb repressive complexes: PRC1 and PRC2

e. PRC2 complexes contain histone deacetylases that inhibit transcription

f. PRC1 complex binds the methylated nucleosomes 

g. The PRC1 complex contains a ubiquitin ligase 
TLS Online TPP Program

#Question id: 26573

#Unit 3. Fundamental Processes

Correct order of Step for X-chromosome inactivation is 
a. Xic generate xist RNA 
b. xist RNA wrapped over X chromosome 
c. MacroH2A recruited and xist RNA removed 
d. wrapped xist invites PRC2/1 complex
e. PRC2/1 complex  leads to H2AK119ub1 H3K27me3 H4K20me1