Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 2860
TLS Online TPP Program

#Question id: 2885

Which of the following function of DNA methylation in mammalian cell is incorrect?

#Unit 2. Cellular Organization

  1. The principal general function of DNA methylation in mammalian cells is to stabilize, or lock in, patterns of transcriptional silencing so that transcription is suppressed in highly methylated regions of chromatin.

  2. One of these is the regulation of gene expression, and it is the extent of DNA methylation in the key trans-acting regulatory elements that distinguishes actively transcribing genes from silenced genes.

  3. Highly repetitive DNA sequences, such as satellite repeats in pericentromeric heterochromatin and dispersed transposons, are extensively methylated, but there is also significant—though more sporadic—methylation in the main body (exons and introns) of genes and in intergenic regions.

  4. Patterns of gene expression that defines the identity of cells or that allow just one of the two alleles to be normally expressed can be locked in by DNA methylation.

More Questions
TLS Online TPP Program

#Question id: 4691

#Unit 3. Fundamental Processes

Processing of pre-rRNA transcripts (30S)  in bacteria, after the modification and cleavage produces mature RNAs is
TLS Online TPP Program

#Question id: 1635

#Unit 4. Cell Communication and Cell Signaling

What is immunological unresponsiveness to self-antigens called?
TLS Online TPP Program

#Question id: 249

#Unit 1. Molecules and their Interaction Relevant to Biology

According to Chargaffʹs observations of nucleotide composition of DNA samples, which of the following options are correct
A) % of (G + C) + % of (A + T) = 100%.
B) A = T.
C) G = C.
D) %A + %C + %T = 100%.
TLS Online TPP Program

#Question id: 488

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following compounds cannot serve as the starting material for the synthesis of glucose via gluconeogenesis?
TLS Online TPP Program

#Question id: 1475

#Unit 4. Cell Communication and Cell Signaling

Which of the following protein in C.elegans homolog of the human Bcl-2 protein?