TLS Online TPP Program

#Question id: 2826


An open reading frame (ORF) is defined as a DNA sequence that

a. begins with a start codon.               

b. ends with a stop codon.

c. contains 50 codons.   

d. contains approximately an equal frequency of A, T, G, and C.

#Unit 2. Cellular Organization
  1. b and c

  2. a and b

  3. a and c

  4. c and d

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TLS Online TPP Program

#Question id: 28095

#Unit 6. System Physiology – Plant

Which of the following proteins are directly involved in various nonphotochemical quenching (NPQ)    
(a) PSBS
(b) PSBA
(c) PSBB
(d) violaxanthin de‐epoxidase
Which of the following is correct 

TLS Online TPP Program

#Question id: 28096

#Unit 6. System Physiology – Plant

Buildup of a acidic thylakoid ΔpH in the presence of excess light resulting the thylakoid lumen activates an enzyme that converts violaxanthin into zeaxanthin which is 

TLS Online TPP Program

#Question id: 28097

#Unit 6. System Physiology – Plant

Asada-Halliwell pathway protects plants against oxidative stress during unfavorable environmental growth regimes 
a. Also known as The ascorbate-glutathione pathway 
b. Involved only enzymatic reaction 
c. Involved both enzymatic as well as non enzymatic reation 
d. Is an indispensable component of the ROS homeostasis mechanism of plants
Which of the following is correct

TLS Online TPP Program

#Question id: 28098

#Unit 6. System Physiology – Plant

The biosynthesis of chlorophylls and heme begins with the synthesis of

TLS Online TPP Program

#Question id: 29116

#Unit 6. System Physiology – Plant

Which one of the following is the correct order of during light reaction in the thylakoid membrane of chloroplast

TLS Online TPP Program

#Question id: 29117

#Unit 6. System Physiology – Plant

Light reactions of photosynthesis are carried out by four major protein complexes: Photosystem I (PSI), photosystem II (PSII), the cytochrome b6f complex and ATP synthase. The following are certain statements on PSII:
a. Red light absorbed by photosystem II (PSII) produces a strong oxidant and a weak reductant.
b. Far-red light absorbed by photosystem II (PSI) produces a weak oxidant and a strong reductant.
c. The strong oxidant generated by PSII oxidizes water,
d. The strong reductant generated by PSII oxidizes water
Which one of the following combinations of the above statements is correct?