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TLS Online TPP Program

#Question id: 9270

In the lowest excited state, the excited chlorophyll has four alternative pathways for disposing of its available energy which of the statement of alternative pathway would be INCORRECT?

#I Life Science/ Life Sciences Group – I-V
  1. Excited chlorophyll can re-emit a photon and thereby return to its ground state—a process known as fluorescence, When it does so, the wavelength of fluorescence is slightly longer than the wavelength of absorption
  2. The excited chlorophyll can return to its ground state by directly converting its excitation energy into heat, with the emission of a photon
  3. Chlorophyll may participate in energy transfer, during which an excited chlorophyll transfers its energy to another molecule
  4. The photochemistry, in which the energy of the excited state causes chemical reactions to occur, the photochemical reactions of photosynthesis are among the fastest known chemical reactions
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TLS Online TPP Program

#Question id: 11384

#SCPH06 I Botany

Two islands, P and Q, are similar in habitat and other features. They are 100 and 200 km2 in size respectively, but have the same number of species. Which of the following statements can independently explain this observation?

(i) P is closer to the mainland than Q

(ii) P is further away from the mainland than Q

(iii) P has higher speciation rates than Q

(iv) P has lower speciation rates than Q
TLS Online TPP Program

#Question id: 11458

#I Life Science/ Life Sciences Group – I-V

A person able to hear only low-frequency sounds would probably have which of the following structural problems in the ear?
TLS Online TPP Program

#Question id: 8856

#SCPH06 I Botany

Which of these can be observed in the mesohyl of various undisturbed sponges at one time or another?

1. amoebocytes

2. spicules

3. spongin

4. zygotes

5. choanocytes
TLS Online TPP Program

#Question id: 8709

#SCPH28 | Zoology

Eukaryotes that are not closely related and that do not share many anatomical similarities can still be placed together on the same phylogenetic tree by comparing their ________.
TLS Online TPP Program

#Question id: 15480

#SCPH06 I Botany

Feedback repression involves the turning “off” of enzyme synthesis when the amount of the product has been made in sufficient quantities. The end product of the pathway acts as