Practice Questions

TLS Online TPP Program

#Question id: 10799

Arabidopsis thaliana mutants that lack the enzyme chalcone synthase____

#Unit 6. System Physiology – Plant

Lacking Lignin, Is a Highly Complex flavonoids
Still formed Tannins
Lacking flavonoids, and these plants are much more sensitive to UV-B radiation
inhibits synthesis of Trans-cinnamic acid, p-coumaric acid, they are derivatives of chalcone synthase

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TLS Online TPP Program

#Question id: 29437

#Unit 6. System Physiology – Plant

Important chemical reactions involved in Nitrate assimilation at roots are given

a. a & b both is Nitrate reductase

b. a & b both is NADPH nitrite reductase

c. a is Nitrate reductase and reaction takes place in plastid

d. a is Nitrate reductase and b is NADPH nitrite reductase

Choose the correct statement made regarding the above reactions of the following

TLS Online TPP Program

#Question id: 29438

#Unit 6. System Physiology – Plant

Symbiotic nitrogen fixation in legume nodules involves Root hair cellular responses to bacterial Nod factor and this response is time-based phenomenon

Match the Response with their appropriate timing

TLS Online TPP Program

#Question id: 29439

#Unit 6. System Physiology – Plant

Nitrogenase, a complex metal containing enzyme is involved in conversion of N2 to NH3•

a. Nitrogenase is composed of two component proteins

b. Nitrogenase is a complex consisting of the MoFe protein (dinitrogenase or component I) a heterotetramer

c. Nitrogenase is a complex consisting of the MoFe protein (dinitrogenase or component I) a heterotetramer

d. Fe protein (dinitrogenase reductase or component II) a heterodimer

Which of the combination of above statement about Nitrogenase is INCORRECT

TLS Online TPP Program

#Question id: 29440