TLS Online TPP Program

#Question id: 28286


Which of the following statement is correct about mechanical block to polyspermy?

#Unit 5. Developmental Biology
  1. it involve chemicals from the fusing sperm cytoplasm alter the sodium ion channels on the membrane
  2. it become active within 1–3 seconds after the binding of the first sperm
  3. Sperm cannot fuse with egg cell membranes that have a positive resting potential
  4. It becomes active about minute after the first successful sperm-egg fusion
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TLS Online TPP Program

#Question id: 1652

#Unit 4. Cell Communication and Cell Signaling

With reference to the variable Ig domain, which of the following statements is FALSE?

TLS Online TPP Program

#Question id: 33704

#Unit 2. Cellular Organization

Find true and false statements
A. Tandemly repeated sequences are liable to undergo misalignments during chromosome pairing
B. The sizes of tandem clusters tend to be homozygous in population
C. The smaller clusters of tandemly repeated sequences can be used to characterize individual genomes

TLS Online TPP Program

#Question id: 10176

#Unit 6. System Physiology – Plant

Leaves acclimate to sun and shade environments, Sun and shade leaves have contrasting biochemical and morphological characteristics such as

a.) Shade leaves increase light capture by having more total chlorophyll per reaction center, a higher ratio of chlorophyll b to chlorophyll a, and usually thinner laminae than sun leaves

b.) Sun leaves decrease CO2 assimilation by having less rubisco and can dissipate excess light energy and Morphologically they have thinner leaves and a larger palisade layer than shade leaves

c.) Shade leaves decrease light capture by having low total chlorophyll per reaction center, a higher ratio of chlorophyll b to chlorophyll a, and usually thicker laminae than sun leaves

d.) Sun leaves increase CO2 assimilation by having more rubisco and can dissipate excess light energy and Morphologically they have thicker leaves and a larger palisade layer than shade leaves

Which of the following combination from the above statements are TRUE?

TLS Online TPP Program

#Question id: 17264

#Unit 11. Evolution and Behavior

The strata of sedimentary rocks in the different regions of the world, have classified geologic history into eras;

Match the following;

TLS Online TPP Program

#Question id: 24236

#Unit 4. Cell Communication and Cell Signaling

Which of the following protein suppresses the expression of E-cadherin during epithelial-to-mesenchymal transition?