Nutrition Overview Quiz

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Questions and Answers

What is the purpose of boiling the leaf in water during the experiment?

To enhance the staining process with iodine

To extract chlorophyll from the leaf

To remove any contaminants from the surface

To kill the tissue and break down cell walls (correct)

Why is hot ethanol used in this experiment?

To kill any remaining pathogens in the leaf

To remove chlorophyll and clarify iodine's color change (correct)

To enhance the temperature effects on the leaf cells

To dissolve pigments other than chlorophyll

What safety precaution should be emphasized when using ethanol in this practical?

Always handle ethanol in a well-ventilated area without goggles

Store ethanol in glass containers to avoid breakage

Turn off the Bunsen burner when handling ethanol due to its flammability (correct)

Always use ethanol in a beaker over an open flame

What color change indicates the presence of chlorophyll in the leaf tissue when tested with iodine?

Colorless to blue-black (A) Signup and view all the answers

What is the function of rinsing the leaf in cold water after ethanol treatment?

To soften the leaf tissue after it has been in ethanol (C) Signup and view all the answers

What defines a limiting factor in photosynthesis?

A resource in scarce supply that restricts life processes (D) Signup and view all the answers

How does temperature influence the rate of photosynthesis?

It affects the kinetic energy of the particles involved (D) Signup and view all the answers

Which of the following is NOT considered a limiting factor in photosynthesis?

Water availability (A) Signup and view all the answers

What happens to enzymes involved in photosynthesis at high temperatures?

They become denatured and lose their functionality (A) Signup and view all the answers

What is the effect of low temperatures on the rate of photosynthesis?

Decrease in kinetic energy of particles (C) Signup and view all the answers

Which factor is essential for photosynthesis but is not typically a limiting factor?

Water availability (A) Signup and view all the answers

What can happen if the active site of an enzyme becomes denatured?

The substrate can no longer bind effectively (A) Signup and view all the answers

Which of the following aspects can affect the rate of photosynthesis?

Chlorophyll concentration (A) Signup and view all the answers

Which food group primarily functions as a source of energy?

Carbohydrates (C) Signup and view all the answers

Which vitamin is essential for the absorption of calcium?

Vitamin D (B) Signup and view all the answers

What is a key function of dietary fiber in the body?

Providing bulk for the intestine (C) Signup and view all the answers

What deficiency can lead to osteoporosis later in life?

Calcium (D) Signup and view all the answers

From which sources can Vitamin C be primarily obtained?

Fruits and vegetables (B) Signup and view all the answers

What is the primary role of lipids in the diet?

Insulation and energy storage (B) Signup and view all the answers

Which food group is essential for tissue growth and repair?

Proteins (C) Signup and view all the answers

What is a common source of calcium in the diet?

Milk and cheese (D) Signup and view all the answers

What are the raw materials required for photosynthesis?

Carbon dioxide and water (B) Signup and view all the answers

Which of the following is NOT a raw material in the photosynthesis process?

Light energy (C) Signup and view all the answers

What is the balanced chemical equation for photosynthesis?

6 CO2 + 6 H2O -> C6H12O6 + 6 O2 (B) Signup and view all the answers

What can glucose produced in photosynthesis be further converted into?

A variety of biological molecules (A) Signup and view all the answers

Which statement about the photosynthesis equation is true?

It provides more marks when written in balanced form. (B) Signup and view all the answers

In photosynthesis, how many molecules of oxygen are produced for every molecule of glucose formed?

6 (A) Signup and view all the answers

Why is light energy not considered a raw material for photosynthesis?

It is not a substance. (A) Signup and view all the answers

What main process do the products of photosynthesis support in plants?

Cell respiration (C) Signup and view all the answers

What is a primary reason for areas without chlorophyll remaining orange-brown?

Photosynthesis cannot occur there. (D) Signup and view all the answers

Which part of the CORMS evaluation refers to the variation being tested?

Change (B) Signup and view all the answers

What is a crucial component to ensure the reliability of results in practical investigations?

Controlling environmental factors (D) Signup and view all the answers

Which food group is not considered a key component of a balanced diet?

Sugars (C) Signup and view all the answers

What health issue can result from an unbalanced diet?

Malnutrition (D) Signup and view all the answers

What does CORMS evaluation help you apply to in experiments?

Different practical scenarios (C) Signup and view all the answers

What is a consequence of malnutrition?

Increased risk of disease (A) Signup and view all the answers

Which factor is NOT controlled according to the CORMS evaluation principles?

Measurement time (D) Signup and view all the answers

What is the primary role of the digestive system?

To break down large, insoluble molecules for absorption (B) Signup and view all the answers

Which of the following statements accurately describes the alimentary canal?

It serves as a passage for food starting from the mouth to the anus (A) Signup and view all the answers

Why do breastfeeding mothers have increased energy needs?

To support increased calcium production for quality breast milk (A) Signup and view all the answers

How do small soluble molecules benefit the body's cells?

They supply energy for respiration and materials for growth (C) Signup and view all the answers

What is the difference between the alimentary canal and accessory organs?

Food passes through the alimentary canal, but not through accessory organs (C) Signup and view all the answers

Which factor contributes to the higher average energy requirements in males than females?

Higher proportion of muscle compared to fat in males (B) Signup and view all the answers

What function do the accessory organs serve in the digestive system?

To produce substances necessary for digestion (C) Signup and view all the answers

What characterizes digestion within the alimentary canal?

It involves breaking down large molecules into smaller ones (B) Signup and view all the answers

Study Notes

Nutrition

A balanced diet includes all food groups in correct proportions
Key food groups: carbohydrates, proteins, lipids, dietary fiber, vitamins, minerals, water
Malnutrition occurs with an unbalanced diet
Malnutrition can cause health problems in humans
Energy needs vary throughout a person's life depending on factors such as age, sex, activity levels, pregnancy, and breastfeeding

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Description

Test your knowledge on the fundamentals of nutrition, including the importance of a balanced diet and the roles of various food groups. Understand how malnutrition impacts health and explore the factors influencing energy needs throughout life.