TLS Online TPP Program

#Question id: 27072


Choose the incorrect statement regarding the Van der Waals interactions & Hydrogen bonds
1. In Van der Waals interactions greater the area of contact the stronger the interaction.
2. In Van der Waals interactions greater the area of contact the weaker  the interaction.
3. Hydrogen bonds Relative strength is inversely proportional to the polarity More polar atoms form weak H bonds.
4. Hydrogen bonds Relative strength is directly proportional to the polarity More polar atoms form stronger H bonds.

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. 1 only 
  2. 2 & 3
  3. 1 & 4    
  4. 3 & 4
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TLS Online TPP Program

#Question id: 11830

#Unit 6. System Physiology – Plant

Not all the ACC found in the tissue is converted to ethylene, ACC can also be converted to a conjugated form, which does not appear to break down and accumulates in the tissue?

TLS Online TPP Program

#Question id: 11831

#Unit 6. System Physiology – Plant

A volatile compound is a strong competitive inhibitor of ethylene binding______

TLS Online TPP Program

#Question id: 11832

#Unit 6. System Physiology – Plant

Ethylene production and action can be inhibited by various types of inhibitors, some statements about  the inhibitor is given below, which one of the following is incorrect?

TLS Online TPP Program

#Question id: 11833

#Unit 6. System Physiology – Plant

Analysis of mRNA from tomato fruits from wild-type and transgenic tomato plants genetically engineered to lack ethylene has revealed that gene expression during ripening is regulated by at least two independent pathways;

I) Ethylene-dependent pathway

II) Ethylene-independent pathway

Some given genes involved in these two pathways,

a) ACC oxidase

b) respiratory metabolism

c) ACC synthase

d) chlorophyllase

e) lycopene and aroma biosynthesis

Which of the following is the correct combination from the given pathways and its included genes?

TLS Online TPP Program

#Question id: 11834

#Unit 6. System Physiology – Plant

Hook formation and maintenance result from ethylene-induced asymmetric growth,  indicating that phytochrome is the photoreceptor involved in this process

a) Red light induces hook folding, and far-red light reverses the effect of red

b) close interaction between phytochrome and ethylene controls hook opening

c) Red light inhibits ethylene formation, promoting growth on the inner side, thereby causing the hook to open

Which of the following combination from the given statements is correct?

TLS Online TPP Program

#Question id: 11835

#Unit 6. System Physiology – Plant

What is the role of ETO1 (ethylene overproducing 1) in ethylene signalling pathway?