Legumes Overview and Importance
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Questions and Answers

What is a primary benefit of soaking beans before cooking them?

  • Enhances the flavor of the beans
  • Minimizes gas production from digestion (correct)
  • Increases the beans' shelf life
  • Softens the beans for quicker cooking

Which statement correctly describes the cooking process for beans?

  • Boil the beans continuously for best results
  • Soak beans twice before cooking
  • Drain and leave beans uncovered while cooking
  • Simmer until tender without boiling (correct)

What is true regarding the storage of dried beans?

  • High temperatures enhance their cooking properties
  • They can keep for up to a year in airtight containers (correct)
  • They should be stored in a cool, humid environment
  • They can last indefinitely when exposed to moisture

Which of the following describes the growth of peanuts?

<p>They are best grown in light sandy soils (D)</p> Signup and view all the answers

What happens to immature soybeans, known as edamame, if consumed raw?

<p>They can cause toxicity due to certain compounds (A)</p> Signup and view all the answers

How is tofu made from soy milk?

<p>By precipitating protein using coagulants (A)</p> Signup and view all the answers

What role do fermented products like miso and natto play in food processing?

<p>They deactivate harmful compounds in raw soybean (B)</p> Signup and view all the answers

What is the oil content range found in soybeans?

<p>13% - 25% (A)</p> Signup and view all the answers

What are the two primary food-storing components found in legume seeds?

<p>Cotyledons and embryo (B)</p> Signup and view all the answers

Which of the following accurately describes the nature of nuts compared to legumes?

<p>Nuts are indehiscent and typically protect a single seed (D)</p> Signup and view all the answers

Which factor best explains why legumes are beneficial in agricultural practices?

<p>They naturally enrich the soil with nitrogen (D)</p> Signup and view all the answers

What is the primary purpose of root nodules in legumes?

<p>To convert atmospheric nitrogen into a usable form for plants (D)</p> Signup and view all the answers

How should dried kidney beans and soya beans be prepared to avoid toxicity?

<p>Soak overnight and cook properly (B)</p> Signup and view all the answers

Which of the following legumes is categorized as a pulse?

<p>Chickpea (D)</p> Signup and view all the answers

What is a major dietary benefit of including legumes in one's diet?

<p>Low in glycemic index and fat (A)</p> Signup and view all the answers

Which statement about the structure of legume flowers is true?

<p>They exhibit bilateral symmetry and have five petals (C)</p> Signup and view all the answers

Flashcards

Legumes

Plants in the Fabaceae family, known for pods containing multiple seeds.

Pulses

Dried seeds of legume plants, eaten as protein sources.

Root Nodules

Structures on legume roots which house nitrogen-fixing bacteria.

Nitrogen Fixation

Conversion of atmospheric nitrogen into a usable form for plants.

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Dehiscent pod

A pod that opens naturally when ripe.

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Cotyledons

Seed leaves in dicot plants that store food for the seedling.

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Legumes in agriculture

Legumes improve soil fertility by enriching with nitrogen.

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Preparing dried legumes

Soaking and cooking dried legumes is important to remove toxins and improve digestion.

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Why soak beans?

Soaking beans overnight helps remove toxins and makes them easier to digest. It also minimizes the production of gas during digestion.

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Why not soak split peas and lentils?

Split peas and lentils cook quickly and don't need soaking. Their smaller size allows for faster cooking and reduced gas production.

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How long can dried beans be stored?

Dried beans can be stored in airtight containers in a cool, dry place for up to a year.

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What are some ways peanuts are used?

Peanuts are a versatile food, used in many ways: eaten raw, roasted, ground into peanut butter, used in oil production, and even as a source of animal feed.

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Soybean oil content

Soybeans contain a significant amount of oil, ranging from 13% to 25% of their weight.

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Soybean protein content

Soybeans are a complete protein source, containing 30% to 50% protein by weight, more than lean beef.

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Why shouldn't you eat edamame raw?

Edamame, immature soybeans, contain toxins that need to be deactivated by cooking.

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Why does soy milk need boiling?

Boiling soy milk deactivates enzymes like lipoxygenase and trypsin inhibitor, which can cause unpleasant flavors and digestion problems.

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Study Notes

Legumes Overview

  • Legumes are part of the Fabaceae family, the third largest flowering plant family
  • Flowers and fruits have similar structures
  • Flowers are 5-petaled and bilaterally symmetrical (butterfly-shaped)
  • Pods contain multiple seeds, which are typically edible
  • Pods naturally open when ripe to release their seeds
  • Seeds contain two cotyledons (food-storing structures)

Composition of Legume Seeds

  • Seeds have a seed coat (testa)
  • Seeds have a micropyle
  • Seeds have two cotyledons
  • Seeds have an embryo
  • Seeds contain an epicotyl and radicle

Importance of Legumes

  • Legumes are a good source of protein, vitamins, minerals, complex carbohydrates, fiber, low in fat, sodium and cholesterol
  • Legumes are a low glycemic index food
  • Prebiotics in legumes promote gut health
  • Legumes can be considered vegetables or protein foods
  • One ounce equivalent of protein
  • 1/4 cup cooked beans
  • One tablespoon of peanut butter

Preparing Dried Legumes

  • Pulses (dried beans, etc.) may contain toxins
  • Soaking overnight can reduce toxin content
  • Rinse beans thoroughly before soaking
  • Soak beans in 3x water volume for at least 8-10 hours (or skip for some varieties)
  • Drain beans, and cook with fresh water until tender

Highlights of Specific Legumes: Peanuts

  • Origin: South America
  • Introduced to Europe via trading
  • Staple crop of South America
  • Grow well in sandy soils
  • Growing cycle of 5 months
  • Fruits develop underground
  • Different varieties: Runner, Virginia, Spanish, Valencia

Soybean

  • Oil content: 13-25%
  • High protein content (30%-50%)
  • Popular in warm, temperate climates with moderate rainfall
  • Important source of food
  • Diverse uses (milk, tofu, etc.)

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Legumes PDF

Description

This quiz covers the key characteristics, composition, and nutritional importance of legumes. Learn about the structure of legume seeds, their health benefits, and the best ways to prepare dried legumes. Test your knowledge on this vital food group and its role in a healthy diet.

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