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TLS Online TPP Program

#Question id: 3535

Phenotypic plasticity refers to  

#Unit 8. Inheritance Biology

  1. change in phenotype over the course of generations with change in genotype

  2. the same genotype producing different phenotypes in different environments

  3. change in phenotype due to random genetic drift

  4. the phenotype being moulded by the environment through natural selection to an optimal state.

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TLS Online TPP Program

#Question id: 21968

#Unit 2. Cellular Organization

Which of the following is correct regarding the euchromatin 
a. Active genes/euchromatin are often found at the borders of chromosome territories
b. active genes from several chromosomes may cluster in inter-chromosomal territories that are enriched in transcription machinery
c. Active genes/euchromatin are often found at the periphery of nuclear wall
d. active genes from several chromosomes may cluster in inter-chromosomal territories do not have transcription machinery
TLS Online TPP Program

#Question id: 21969

#Unit 2. Cellular Organization

Choose the correct statement 
a. Interphase chromosomes occupy chromosome territories in the nucleus and are not entangled with each other
b. Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to the nuclear periphery
c. Interphase chromosomes occupy chromosome territories in the nucleus and are entangled with each other
d. Heterochromatic regions, silenced genes, and gene-sparse regions of chromosomes are typically localized to the nuclear centre
TLS Online TPP Program

#Question id: 23101

#Unit 2. Cellular Organization

Choose the incorrect statement 
TLS Online TPP Program

#Question id: 23102

#Unit 2. Cellular Organization

How many times DNA is folded/compacted when a 200bp DNA is wrapped over core histone 
TLS Online TPP Program

#Question id: 23103

#Unit 2. Cellular Organization

What is 1st level of compaction while making/packaging the nucleosome  
TLS Online TPP Program

#Question id: 23104

#Unit 2. Cellular Organization

Which of the following statement is true regarding second level of organization 
a. The second level of organization is the coiling of the 10-nm fiber of nucleosomes into a helical array.
b. The coiled helical array to constitute the fiber of diameter 30 nm that is found in interphase chromatin and in mitotic chromosomes.
c. This compacts the DNA - 40-fold. The structure of this fiber requires the histone tails and is stabilized by linker histones.
d. Histone H1, histone tails, and increased ionic strength all promote the formation of the 30-nm fiber.