TLS Online TPP Program

#Question id: 9584


In given Relationship of oxygen production to flash energy, the first evidence for the interaction between the antenna pigments and the reaction centre, What conclusion can be drawn about based on graph;


a.) several hundred pigments are associated with each reaction centre and that each reaction centre must operate four times to produce 1 molecule of oxygen—hence the value of 2500 chlorophylls per O2

b.) low light intensity of the curve, an increase in the number of photons stimulates a proportional increase in oxygen evolution. Thus, the slope of the curve measures the quantum yield for oxygen production

c.) The quantum yield for a particular process can range from 0 →if that process does not respond to light to 1.0→if every photon absorbed contributes to the process by forming a product

d.) O2 require more than a single photochemical event to be formed, and therefore have a lower quantum yield of formation than the photochemical quantum yield. It takes about ten photons to produce one molecule of O2, so the quantum yield of O2 production is about 0.1

Which of the following statements would be correct relates with graph?

#Unit 7. System Physiology – Animal
  1. A, B and D           
  2. B, C and D
  3. A and C         
  4. A, B, C and D
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TLS Online TPP Program

#Question id: 11534

#Unit 6. System Physiology – Plant

Which of the following is the precursor of auxin?

TLS Online TPP Program

#Question id: 10790

#Unit 6. System Physiology – Plant

chalcone synthase (CHS) involved in biosynthesis of phenolic compound in plants. Following are some statements regarding the action of CHS;

 a) Chalcone synthase catalyzes the conversion of p-Coumaroyl-CoA into Chalcones

 b) Substrate for Chalcone synthase is chalcone

 c) CHS activity increased by environmental factors, such as light, and fungal infection

 d) Chalcone synthase is enzyme in flavonoid biosynthesis catalyzes stepwise condensation into p-Coumaric acid by using Malonyl-CoA molecules

 Which of the following combinations of above statement is true?

TLS Online TPP Program

#Question id: 15303

#Unit 4. Cell Communication and Cell Signaling

Neurofibromatosis, a benign tumor of the sheath cells that surround nerves, is caused by
a.  Loss of both alleles of NF1
b.  Mutation in RAS GAP-type protein
c.  A single mutant NF1 allele
d.  Mutation in SRC protein

TLS Online TPP Program

#Question id: 29566

#Unit 6. System Physiology – Plant

Pathogen class, with their Species, along with Effector name, and Effector function  are given
a. class - Virus
b. Effector name - P50
c. Effector function - Viral replicase
d. Effector function  - Coat protein

Which of the following is true regarding TMV

TLS Online TPP Program

#Question id: 5789

#Unit 8. Inheritance Biology

Which of the following defects causes ataxia telangiectasis?