The pressure-flow model, first proposed by Ernst Münch, Phloem loading at the source and phloem unloading at the sink establish the pressure gradient.

a.) In source tissues, an accumulation of sugars in the sieve elements generates a lower or negative solute potential (ψs).

 b.) source tissue, causes a steep drop in the water potential (ψ), due to water potential gradient, water enters the sieve elements and causes turgor pressure (ψp ) decrease.

c.) In sink tissues, phloem unloading leads to a lower sugar concentration in the sieve elements, generating a higher or less negative solute potential.

d.) As the water potential of the phloem rises above that of the xylem, water tends to leave the phloem in response to the water potential gradient, causing a decrease in turgor pressure in the sieve elements of the sink.

Which of the following statements of sink and source tissue is FALSE?

TLS Online TPP Program

#Question id: 823

#Unit 1. Molecules and their Interaction Relevant to Biology

chaotropic agents such as guanidinium ion and urea, the efficiency of the chaotropic agent is measured in terms of-

TLS Online TPP Program

#Question id: 653

#Unit 1. Molecules and their Interaction Relevant to Biology

For the enzyme-catalyzed reaction S ~ P, Keq = 5, which of the following curves best represents the change in [S] that occurs with time when S is added to a solution containing the appropriate enzyme?

TLS Online TPP Program

#Question id: 22010

#Unit 1. Molecules and their Interaction Relevant to Biology

Some of the following characteristics of graph are given below related to Lineweaver-Burk equation

a) Also known as double reciprocal 

b) Both the variable of X and Y axis are independent to each other 

c) Both the variable of X and Y axis are dependent to each other

d) positive plot observed 

e) Km obtained from slope 

Choose the set of correct characteristics

TLS Online TPP Program

#Question id: 22011

#Unit 1. Molecules and their Interaction Relevant to Biology

If the value of intercept on x axis in Lineweaver-Burk equation is -2 then the value of Km will be

TLS Online TPP Program

#Question id: 22012

#Unit 1. Molecules and their Interaction Relevant to Biology

Increasing the Km value, the Lineweaver-Burk equation shift

TLS Online TPP Program

#Question id: 22013

#Unit 1. Molecules and their Interaction Relevant to Biology

According to Lineweaver-burk equation, in case of competitive inhibitor, which of the following is correct for X and Y Axis intercept