TLS Online TPP Program

#Question id: 363


What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? If 1.0 mL of 10.0 M NaOH is added to a liter of the buffer prepared, how much will the pH change? (pKa = 6.86)

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. 7.19, 7

  2. 6.86, 7.19

  3. 7, 6.86

  4. 7, 7.19

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TLS Online TPP Program

#Question id: 11822

#Unit 6. System Physiology – Plant

The rate-limiting step in the Ethylene biosynthetic pathway is____

TLS Online TPP Program

#Question id: 11823

#Unit 6. System Physiology – Plant

_____A________the enzyme that catalyzes the conversion of AdoMet to ACC, while ___B_____ catalyzes the conversion of ACC to ethylene

TLS Online TPP Program

#Question id: 11824

#Unit 6. System Physiology – Plant

Only two of the ethylene receptors in Arabidopsis have intrinsic histidine kinase activity, these receptors are_______

TLS Online TPP Program

#Question id: 11825

#Unit 6. System Physiology – Plant

Ethylene receptors are localized into the______

TLS Online TPP Program

#Question id: 11826

#Unit 6. System Physiology – Plant

Some given statements about ethylene signalling pathways are listed;

a) Ethylene receptors are interact with two downstream signaling proteins, CTR1 (CONSTITUTIVE TRIPLE RESPONSE1) and EIN3 (ETHYLENE-INSENSITIVE3)

b) CTR1 is a soluble serine/threonine kinase that is associated with ethylene receptors, while EIN2 is an ER transmembrane protein with a cytosolic C-terminal domain that is a target for CTR1 kinase activity

c) EIN2 is required to stabilize transcription factors of the EIN3 (ETHYLENEINSENSITIVE3) family, which activate the transcription of ethylene-responsive genes

d) EIN3 is required to stabilize transcription factors of the EIN2 (ETHYLENEINSENSITIVE2) family, which activate the transcription of ethylene-responsive genes

Which of the following is the correct statements  of auxin signalling pathway ?

TLS Online TPP Program

#Question id: 11827

#Unit 6. System Physiology – Plant

Which of the following enzyme is involved in the rate-limiting step in ethylene biosynthesis?