Several transport steps are involved in the movement of photosynthate from the mesophyll chloroplasts to the sieve elements of mature leaves; The following steps are invoved with sucrose transportation is given;

a) During the day, triose phosphate is transported from the chloroplast to the cytosol, where it is converted to sucrose.

b) During the night, carbon from stored starch exits the cytosol primarily in the form of maltose and is converted to sucrose

c) Sucrose moves from the mesophyll cells to the sieve elements in the smallest veins of the leaf. This is called short-distance transport pathway

d) With respect to unloading, sucrose and other solutes are translocated away from the source through the vascular system to the sink is referred to as long-distance transport

Which of the following combination is correct?

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#Question id: 425

#Unit 1. Molecules and their Interaction Relevant to Biology

Which is usually the slowest way to regulate a reaction in a metabolic pathway?

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#Question id: 4204

#Unit 3. Fundamental Processes

For each amino acid added to a polypeptide chain, __ phosphoanhydride bonds are cleaved.

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#Question id: 2452

#Unit 2. Cellular Organization

Intermediate filaments

a. are typically 6 nm in diameter.                  

b. are essential for cell motility.

c. may be used to diagnose the tissue of origin for many cancers.

d. are composed of globular subunits.                       

e. are formed from tetrameric subunits.

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#Question id: 19085

#Unit 6. System Physiology – Plant

ToxA is produced by both nodorum and tritici‐repentis, which cause disease such as__

a) chlorosis

b) bronze spot

c) glume blotch

d) tan spot

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#Question id: 19037

#Unit 13. Methods in Biology

In gas chromatography, the basis for separation of the components of the volatile material is the difference in________