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TLS Online TPP Program

#Question id: 1466

Which of the following functions does the product of the p53 gene carry out?

#Unit 4. Cell Communication and Cell Signaling

  1. It inhibits the cell cycle.

  2. It slows down the rate of DNA replication by interfering with the binding of DNA polymerase.

  3. It causes cells to reduce expression of genes involved in DNA repair.

  4. It allows cells to pass on mutations due to DNA damage.

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TLS Online TPP Program

#Question id: 29091

#Unit 10. Ecological Principles

Increased solar energy, together with an abundance of water, results in high productivity of plants is an characteristics of____
TLS Online TPP Program

#Question id: 29092

#Unit 10. Ecological Principles

Based on the intermediate disturbance hypothesis, a community’s species diversity is increased by
TLS Online TPP Program

#Question id: 29093

#Unit 10. Ecological Principles

Five Hypotheses Explain How Species Richness Affects Community Services
I-Elton’s hypothesis
II-rivet hypothesis
III-Redundancy hypothesis
IV-Keystone hypothesis
V-Idiosyncratic hypothesis
a) Species that play the same roles in a community can compensate for each other if some are lost under particular conditions
b) Community services change as the number of species increases or decreases
c) there is a linear correlation between species richness and community services
d) species is an organism that helps hold the system together
e)Some species play a small but critical role in keeping the plane
Correctly match the following hypothesis with their correct  prediction;
TLS Online TPP Program

#Question id: 29094

#Unit 8. Inheritance Biology

A cross was made between pure wild type flower with white color short pollen, F1 plant was allowed to test cross to produced numerous Offspring in following number;

What is approximate distance between Flower color gene and pollen length gene?
TLS Online TPP Program

#Question id: 29095

#Unit 8. Inheritance Biology

The following table summarizes the result of a cross between two strains of Neurospora having the alleles A and a, respectively. The table shows the different patterns of octad arrangement, and the number of ascus observed of each type;

A) According to the graph first two column are from meiosis with no crossover between locus A and_____I_______ 

B) The pattern for first these two columns represent______II_______

C) The distance between the locus A and the centromere is ___III___ map units
TLS Online TPP Program

#Question id: 29096

#Unit 8. Inheritance Biology

When a homozygous plant that produces purple fruit (PP) is crossed with a homozygous plant that produces white fruit (pp), all the heterozygous F1 (Pp) produce violet fruit If an F1 eggplant is used in a testcross, what proportion of the progeny from this cross will be white?