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TLS Online TPP Program

#Question id: 10911

Researchers have investigated bidirectional transport by applying two different radiotracers to two source leaves, one above the other. Researcher wanted to see how bidirectional transport happens in sieve elements. Which one of the following is INCORRECT interpretation for bidirectional transport?

#Unit 6. System Physiology – Plant
  1. Transport in two directions has often been detected in sieve elements of different vascular bundles in stems
  2. Transport in two directions has also been seen in adjacent sieve elements of the same bundle in petioles
  3. simultaneous bidirectional transport in a single sieve element has also been demonstrated
  4. Bidirectional transport in adjacent sieve elements can occur in the petiole of a leaf that is undergoing the transition from sink to source and simultaneously importing and exporting photosynthates through its petiole
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TLS Online TPP Program

#Question id: 33242

#Unit 1. Molecules and their Interaction Relevant to Biology

Reactants must come together with the proper spatial relationship for a reaction to occur in the active site of enzymes called as
TLS Online TPP Program

#Question id: 1336

#Unit 4. Cell Communication and Cell Signaling

A distinct form of membrane protrusion that is often observed when cells are cultured on a pliable extracellular matrix substrate is known as
TLS Online TPP Program

#Question id: 11497

#Unit 7. System Physiology – Animal

Which of the following is best described as an elongated, encapsulated receptor found in the dermal pegs of glabrous skin and is especially abundant on lips and fingertips?
TLS Online TPP Program

#Question id: 18596

#Unit 11. Evolution and Behavior

First toothed birds appear in which geological time periods?
TLS Online TPP Program

#Question id: 4732

#Unit 8. Inheritance Biology

What is F2 phenotype ratio observed when a homozygous recessive mutation in either or both of two different genes results in the same mutant phenotype?