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TLS Online TPP Program

#Question id: 12343

Hybrids between some related species of plants are sterile because the parent plants had different chromosome numbers. Occasionally the chromosome number of such a hybrid  plant doubles spontaneously. Which of the following best describes the descendants of those plants with the double chromosome number?

#Unit 10. Ecological Principles
  1. The plant with the double chromosome number would be genetically defective and have no descendants. 
  2. The descendants would be at a selective advantage because of the increased ability to introgress.
  3. The descendants would be reproductively successful because they could backcross with the parental species.
  4. The descendants would regain the ability to reproduce sexually because chromosomes could pair normally.
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TLS Online TPP Program

#Question id: 2972

#Unit 2. Cellular Organization

Match the following attachment (Column I) with definition(Column II).

Column I

Column II

A. Monotelic Attachment

I. When sister kinetochores attach to microtubules emanating from opposite spindle poles, they are stably attached.

B. Syntelic Attachment

II. When one kinetochore attaches to microtubules emanating from two opposite spindle poles.

C. Amphitelic Attachment

III. When both sister kinetochores attach to microtubules emanating from the same spindle pole.

D. Merotelic Attachment

IV. When only one of the two sister kinetochores attaches to microtubules.

Which of the following is correct?
TLS Online TPP Program

#Question id: 11087

#Unit 7. System Physiology – Animal

Which of the following oxygen-hemoglobin dissociation curves corresponds to normal blood (red line) and blood containing carbon monoxide (green line)?
TLS Online TPP Program

#Question id: 33388

#Unit 1. Molecules and their Interaction Relevant to Biology

At what pH where polyglu will readily forms an α-helix.
TLS Online TPP Program

#Question id: 4812

#Unit 8. Inheritance Biology

Two character X and Y ,both follow law of dominance due to 3:1 F2 phenotypic ratio monohybrid cross separately If carry out dihybrid selfing cross for heterozygous genotype for both character does not follow law of independence assortment in normal environmental condition due to?
TLS Online TPP Program

#Question id: 33703

#Unit 2. Cellular Organization

What will be the buoyant density of a duplex DNA having 60% GC sequences