Assertion (A): During the induction phase of pollen culture, total protein synthesis is completely halted. 

Reason (R): Existing proteins are suppressed, and new proteins like napin (in Brassica napus) are synthesized.

Select the correct option from:

TLS Online TPP Program

#Question id: 73

#Biochemistry

Match the Variation of Reaction Spontaneity (Sign of ΔG) given in Column I with the Signs of ΔH and ΔS given in column II.

COLUMN I	COLUMN II
	ΔH	ΔS	ΔG = ΔH – TΔS
1.	−	+	a. The reaction is both enthalpically and entropically opposed. It is nonspontaneous (endergonic) at all temperatures.
2.	−	−	b. The reaction is enthalpically opposed (endothermic) but entropically favored. It is spontaneous only at temperatures above T = ΔH/ΔS.
3.	+	+	c. The reaction is enthalpically favored but entropically opposed. It is spontaneous only at temperatures below T = ΔH/ΔS.
4.	+	−	d. The reaction is both enthalpically favored (exothermic) and entropically favored. It is spontaneous (exergonic) at all temperatures.

TLS Online TPP Program

#Question id: 74

#Biochemistry

The enthalpy and entropy of the initial and final states of a reacting system are shown in the table. Calculate the change in free energy for the reaction when the temperature is 4°C.

TLS Online TPP Program

#Question id: 75

#Biochemistry

The experimental approach taken in current biological investigations presumes that ________.

TLS Online TPP Program

#Question id: 76

#Biochemistry

Which of the following illustrations is not a structural isomer of an organic compound with the molecular formula C6H14? For clarity, only the carbon skeletons are shown; hydrogen atoms that would be attached to the carbons have been omitted.

TLS Online TPP Program

#Question id: 77

#Biochemistry

Which of the pairs of molecular structures shown depict enantiomers (enantiomeric forms) of the same molecule?

TLS Online TPP Program

#Question id: 78

#Biochemistry

Which is true about naturally occurring monosaccharides?