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TLS Online TPP Program

#Question id: 10289

If C6 of glucose is radiolabelled, which carbon of Dihydroxyacetone phosphate and glyceraldehyde 3-phosphate  is radiolabelled?

#Unit 6. System Physiology – Plant
  1. Dihydroxyacetone phosphate third carbon while glyceraldehyde 3-phosphate first carbon radiolabelled
  2. Dihydroxyacetone phosphate third carbon while glyceraldehyde 3-phosphate not radiolabelled

  3. Dihydroxyacetone phosphate is not radiolabelled while glyceraldehyde 3-phosphate third carbon radiolabelled

  4. Dihydroxyacetone phosphate first carbon radiolabelled while glyceraldehyde 3-phosphate not radiolabelled

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TLS Online TPP Program

#Question id: 11806

#Unit 6. System Physiology – Plant

sap is translocated from areas of supply, called sources, to areas of metabolism or storage, called sinks. Which of the following statements about source and sink are TRUE?

a.) Sinks include any nonphotosynthetic organs of the plant and organs that do not produce enough photosynthetic products to support their own growth or storage needs

b.) Sources include exporting organs that are capable of producing photosynthate in excess of their own needs

c.) During the growing season of the first year, storage root is a sink, when it accumulates sugars received from the source leaves. During the second growing season the same root becomes a source

d.) Roots, tubers, developing fruits, and immature leaves, which must import carbohydrate for normal development, are all examples of sources tissues

Find the correct combination of the source and sink pattern of translocation.
TLS Online TPP Program

#Question id: 13198

#Unit 6. System Physiology – Plant

The sugar is a carbohydrate that are generally translocated  in the phloem in which form?
TLS Online TPP Program

#Question id: 13199

#Unit 6. System Physiology – Plant

The non-reducing sugar sucrose is most commonly translocated in the phloem rather than reducing sugar. Why?
a.) because they are less reactive than their reducing counterparts
b.) because sucrose contains more energy than a monosaccharides
c.) because the ketone or aldehyde group is reduced to an alcohol or combined with a similar group on another sugar so as not to be oxidized 
Which one of the following statements is true about translocation of non-reducing sugar?
TLS Online TPP Program

#Question id: 13200

#Unit 6. System Physiology – Plant

In the modification of translocation pathways, Interference with a translocation pathway by wounding or pruning can alter the patterns established by proximity and vascular connections. In the absence of direct connections between source and sink, vascular interconnections, called
TLS Online TPP Program

#Question id: 11804

#Unit 6. System Physiology – Plant

P-proteins have been characterized at the molecular level. P-proteins from the genus Cucurbita consist of two major proteins;
TLS Online TPP Program

#Question id: 11801

#Unit 6. System Physiology – Plant

Which one of the following compound most commonly transported in sieve elements of the phloem?