TLS Online TPP Program

#Question id: 787


Which of the following statement is INCORRECT with respect to the structure of DNA?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. Six adenosines in a row in a DNA helix produce a bend of about 18 degrees.

  2. DNA was first isolated and characterized by Friedrich Miescher who called the phosphorus-containing substance “nuclein.”

  3. It is the pentoses that define the identity of a nucleic acid not the nitrogenous bases.

  4. The Z-DNA tracts do not play any role in regulating the expression of some genes or in genetic recombination.

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TLS Online TPP Program

#Question id: 3399

#Unit 11. Evolution and Behavior

What is probability of neutral mutation to be lost from the population size 100 and Probability of being homozygote in given population size 10 respectively?

TLS Online TPP Program

#Question id: 3398

#Unit 11. Evolution and Behavior

Genetic drift in a small population for multiple generations can significantly affect the composition of a population’s gene pool. Following some observation are given for reason of Genetic drift?

A) Small populations are threatened by a loss of genetic variability. This loss may be caused by inbreeding, genetic drift, and limited mating.

B) Sampling error can arise is through the founder effect, which is due to the limited matting within population

C) Genetic drift arises is through a genetic bottleneck, which develops when a population undergoes a drastic reduction in population size.

D) Variance in allele frequency due to genetic drift will be maximal when one allele is very rare and the population size is small.

Which of the above observation are true?

TLS Online TPP Program

#Question id: 5200

#Unit 11. Evolution and Behavior

What is the difference between a linkage map and a physical map?

TLS Online TPP Program

#Question id: 5201

#Unit 11. Evolution and Behavior

How is a physical map of the genome of an organism achieved?

TLS Online TPP Program

#Question id: 5202

#Unit 11. Evolution and Behavior

Which of the following most correctly describes a shotgun technique for sequencing a genome?

TLS Online TPP Program

#Question id: 5205

#Unit 11. Evolution and Behavior

Why is it preferable to use large computers and databases in searching for individual genes, rather than testing each sequence for possible function?