TLS Online TPP Program

#Question id: 12551


Which of the following examples would most accurately measure the density of the population being studied? 

#Unit 10. Ecological Principles
  1. Counting the number of prairie dog burrows per hectare
  2. Counting the number of times a 1 kilometer transect is intersected by tracks of red squirrels after a snow- fall
  3. Counting the number of coyote droppings per hectare
  4. Counting the number of zebras from airplane census observations.
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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: 908

#Unit 1. Molecules and their Interaction Relevant to Biology

Molecular chaperones are a class of proteins that play a role

TLS Online TPP Program

#Question id: 14726

#Unit 13. Methods in Biology

For two events A and B  

(i) not less than P(A) + P(B) -1

(ii)not greater than P(A) + P(B)


TLS Online TPP Program

#Question id: 2902

#Unit 2. Cellular Organization

The function and positioning of the histone variants can be studied by an application of technologies used in genomics. One useful technology is chromatin immunoprecipitation, or chromatin IP (ChIP). The correct sequence of the processes that occur in this experiment will be?

1. A histone variant with an epitope tag is introduced into a particular cell type, where it is incorporated into nucleosomes.

2. The pattern of hybridization on the microarray reveals the DNA sequences bound by the nucleosomes with the histone variant.

3. Antibody is added, and the nucleosomes containing the epitope-tagged histone variant are selectively precipitated.

4. Chromatin is isolated from the cells and digested briefly with micrococcal nuclease (MNase).

5. The DNA in these nucleosomes is extracted from the precipitate, labeled, and used to probe a microarray representing all or part of the genomic sequences of that particular cell type.

TLS Online TPP Program

#Question id: 16326

#Unit 7. System Physiology – Animal

What are adaptations?