When the modern mechanical roller mill grinds wheat and other grains

Question

BlackTom AI · Accepted Answer

When evaluating how modern mechanical roller mills affect wheat and other grains, each nutrient category can be impacted by the milling process. 
Option 1: 'vitamins are lost' — vitamins, especially fat-soluble and some water-soluble vitamins, are concentrated in the germ and some in the bran; removing these portions during refining often reduces the vitamin content of the milled flour. This makes the statement plausible. 
Option 2: 'minerals are lost' — minerals such as iron, magnesium, zinc, and others are also associated with the bran and germ; refining flour tends to lower its mineral content because the mineral-rich outer layers are removed. This is another plausible consequence. 
Option 3: 'All of the answers are correct' — since both vitamins and minerals can be reduced by milling, and fiber is also affected by removing bran, the combined statement that all listed nutrient losses occur aligns with how refined flour is produced. This option is consistent with the general understanding of milling effects. 
Option 4: 'fiber is lost' — dietary fiber primarily resides in the bran; refining and roller-milling flour typically strips away much of this bran, reducing fiber content in the final product. This is a correct assessment as well. 
Taken together, the first, second, and fourth options each identify a nutrient loss associated with refining flour, and the third option asserts that all of these losses occur. Because the claims are mutually reinforcing rather than exclusive, the bundled option captures the full effect of the milling process. 
In summary, evaluating the implications of modern mechanical roller milling shows that vitamins, minerals, and fiber can all be reduced in refined flour, which supports choosing the 'All of the answers are correct' option as the correct choice in this question.

When the modern mechanical roller mill grinds wheat and other grains单项选择题

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