After unloading, the sugars are transported to cells in the sink by means of a short-distance transport pathway. This pathway has also been called,

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#Question id: 910

#Unit 1. Molecules and their Interaction Relevant to Biology

Experiments on denaturation and renaturation after the reduction and reoxidation of the —S—S— bonds in the enzyme ribonuclease (RNase) have shown that:

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#Question id: 31175

#Unit 7. System Physiology – Animal

Excitatory postsynaptic potential (EPSP) is produced through excitatory transmitter which opens:

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#Question id: 4366

#Unit 3. Fundamental Processes

Which of the following is the correct order of addition of general transcription factors to the initiation complex?

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#Question id: 28251

#Unit 5. Developmental Biology

the arrangement of axoneme in sperm propulsion system consist of___

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#Question id: 12409

#Unit 6. System Physiology – Plant

The Chemical Structure of ABA Determines Its Physiological Activity, 15 carbon compound 

a) The orientation of the carboxyl group at carbon 2 determines the cis and trans isomers of ABA. Nearly all the naturally occurring ABA is in the cis form

b) S enantiomer is the natural form; commercially available synthetic  ABA is a mixture of approximately equal amounts of the S and R forms.

c) The S enantiomer is the only one that is active in fast responses to ABA, such as stomatal closure

d) In long-term responses, such as seed maturation, only R-enantiomers are active

e) In contrast to the cis and trans isomers, the S and R forms cannot be interconverted in the plant tissue

Which of the following is the correct prediction about the active form  of ABA?