Which grain would be the best choice for Sima who needs to increase her intake of protein, fibre and thiamin?

Question

BlackTom AI · Accepted Answer

Quinoa is a complete plant protein and also provides relatively high fibre and B‑vitamins (including thiamin) compared with the other listed grains, so a. Quinoa is the best choice.

1) Relevant knowledge points
- Protein quality: most grains are incomplete proteins (low in one or more essential amino acids). Quinoa is unusual among grains/seeds because it contains all essential amino acids, giving higher-quality protein per serving.
- Fibre: whole grains vary, but quinoa is a good source of soluble and insoluble fibre that supports satiety and digestion.
- Thiamin (vitamin B1): whole grains and some pseudocereals provide thiamin; quinoa tends to supply more thiamin per serving than refined or some other whole grains.

2) Step‑by‑step reasoning
- Compare protein: quinoa supplies more protein per typical cooked serving and with a better amino acid profile than brown rice, bulgur or barley. That means it increases both quantity and quality of protein intake.
- Compare fibre: quinoa’s whole‑seed structure yields substantial fibre. Bulgur and barley can be good for fibre too, but barley’s fibre is often higher in specific forms (beta‑glucan) while bulgur is moderate; quinoa still ranks well overall.
- Compare thiamin: quinoa contains measurable thiamin and other B‑vitamins; brown rice and bulgur contain some thiamin but generally less than quinoa on a per‑serving basis, and barley typically provides less thiamin than quinoa.

3) Calculations
- No precise numeric calculation is required here; the decision is based on relative nutrient density (protein quality and combined fibre + thiamin content).

4) Why the correct answer is correct
Quinoa uniquely combines higher‑quality protein (complete amino acid profile), solid fibre content, and appreciable thiamin, making it the best single choice to raise all three nutrients.

5) Why other options are less suitable
- Bulgur: good fibre but lower protein quality and less thiamin than quinoa.
- Brown rice: moderate fibre but lower protein and thiamin.
- Barley: high fibre (especially beta‑glucan) but lower protein quality and less thiamin.

Conclusion: The best choice is a. Quinoa, which matches the provided answer.

Which grain would be the best choice for Sima who needs to increase her intake of protein, fibre and thiamin?单项选择题

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