Keep Yourself Updated: A Quiz On 9th Grade Biology!

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Questions: 11 | Attempts: 235 | Updated: Oct 24, 2024

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Keep Yourself Updated: A Quiz On 9th Grade Biology! - Quiz

A balanced diet involves eating the right types of nutrients in the right proportions. You may see claims made that fast food is in fact healthy. Yes, the fast food companies do include the main nutrients - carbohydrates, proteins, fats, vitamins, mineral ions, fibre and a drink, but these are in the wrong proportions to be healthy when eaten regularly. Let's delve into healthy eating lifestyles, shall we?

Questions and Answers

1.

Some people follow special diets to reduce their weight. One of these is called the Atkins diet which is very low in carbohydrates. This forces the body to do what?
- A.
  
  To lose weight by burning its stores of fat
- B.
  
  To lose weight by reducing the amount of protein eaten
- C.
  
  To lose weight by increasing the number of calories eaten
- D.
  
  To lose weight by not digesting food properly
Correct Answer
A. To lose weight by burning its stores of fat

Explanation
The Atkins diet is a low-carbohydrate diet that forces the body to burn its stores of fat in order to lose weight. By reducing the intake of carbohydrates, the body is deprived of its main source of energy and is forced to use stored fat for fuel instead. This process, known as ketosis, leads to weight loss as the body breaks down fat for energy.

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2.

The Weight Watchers diet gives points values for all of the food eaten. It does not limit what can be eaten but requires the person to stay to their points limit. Which of the following statements best describes this diet?
- A.
  
  The diet causes weight loss by increasing the amount of vitamins and minerals eaten
- B.
  
  The diet causes weight loss by increasing the amount of protein eaten
- C.
  
  The diet causes weight loss by artificially increasing metabolic rate
- D.
  
  The diet causes weight loss whilst eating a balanced diet
Correct Answer
D. The diet causes weight loss whilst eating a balanced diet

Explanation
The Weight Watchers diet is based on a points system, where each food is assigned a points value. This allows individuals to have flexibility in their food choices while still controlling portion sizes and overall calorie intake. By staying within their points limit, individuals can create a calorie deficit, which leads to weight loss. The emphasis on a balanced diet suggests that the diet includes a variety of nutrients, including vitamins and minerals, rather than focusing solely on increasing a specific nutrient like protein.

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3.

Which is the best for your heart?
- A.
  
  A high proportion of HDL cholesterol compared to LDL cholesterol
- B.
  
  Equal amounts of HDL cholesterol compared to LDL cholesterol
- C.
  
  A low proportion of HDL cholesterol compared to LDL cholesterol
- D.
  
  No cholesterol of any type
Correct Answer
A. A high proportion of HDL cholesterol compared to LDL cholesterol

Explanation
A high proportion of HDL cholesterol compared to LDL cholesterol is considered the best for your heart because HDL cholesterol is often referred to as "good" cholesterol as it helps remove LDL cholesterol (known as "bad" cholesterol) from the bloodstream, reducing the risk of plaque buildup in the arteries and lowering the risk of heart disease. Therefore, having a higher proportion of HDL cholesterol compared to LDL cholesterol is beneficial for heart health.

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4.

What are low density lipoproteins (LDL's)?
- A.
  
  'Good' cholesterol
- B.
  
  Fat that is stored in the body
- C.
  
  Chemicals that carry carbohydrates in the bloodstream
- D.
  
  Chemicals that carry cholesterol in the bloodstream
Correct Answer
D. Chemicals that carry cholesterol in the bloodstream

Explanation
LDL's, or low density lipoproteins, are chemicals that carry cholesterol in the bloodstream. Cholesterol is a waxy substance that is produced by the liver and is essential for the body's normal functioning. However, high levels of LDL cholesterol can lead to the buildup of plaque in the arteries, increasing the risk of heart disease and stroke. Therefore, it is important to maintain healthy levels of LDL cholesterol in the bloodstream.

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5.

The level of cholesterol in your body is determined by what?
- A.
  
  Only what you eat
- B.
  
  Only what you drink
- C.
  
  Only genetic inheritance
- D.
  
  Both genetic and dietary factors
Correct Answer
D. Both genetic and dietary factors

Explanation
The level of cholesterol in your body is determined by both genetic and dietary factors. While your genetic inheritance plays a role in determining your baseline cholesterol levels, your diet also has a significant impact on your cholesterol levels. Consuming foods high in saturated and trans fats can raise your cholesterol levels, while a diet rich in fruits, vegetables, and whole grains can help lower cholesterol. Therefore, it is important to consider both genetic factors and dietary choices when managing cholesterol levels.

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6.

Which of the following health problems is not related to eating too many calories?
- A.
  
  Heart disease
- B.
  
  Rickets
- C.
  
  Strokes
- D.
  
  Diabetes
Correct Answer
B. Rickets

Explanation
Rickets is a health problem that is not directly related to eating too many calories. Rickets is caused by a deficiency in vitamin D, calcium, or phosphate, which affects the development and strength of bones. It is commonly seen in children who do not receive enough sunlight or have a poor diet lacking in essential nutrients. While consuming excessive calories can lead to heart disease, strokes, and diabetes, it does not directly cause rickets.

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7.

Under-eating is as bad for your health as overeating. Why is this?
- A.
  
  Because if you under-eat you may not get sufficient vitamins and minerals
- B.
  
  Because if you under-eat you are always hungry
- C.
  
  Because if you under-eat you look thin
- D.
  
  Because if you under-eat you get too much protein
Correct Answer
A. Because if you under-eat you may not get sufficient vitamins and minerals

Explanation
Under-eating can lead to a deficiency in essential vitamins and minerals that are necessary for maintaining good health. When the body does not receive enough nutrients, it can affect various bodily functions and weaken the immune system. This can result in a range of health problems such as fatigue, weakened bones, impaired cognitive function, and a compromised immune system. Therefore, under-eating can be just as detrimental to health as overeating, as both extremes can lead to nutrient imbalances and negative health consequences.

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8.

Which of the following foods contains carbohydrates?
- A.
  
  Bread
- B.
  
  Potato
- C.
  
  Pasta
- D.
  
  All the above
Correct Answer
D. All the above

Explanation
Bread, potato, and pasta all contain carbohydrates. Carbohydrates are one of the three main macronutrients and are an important source of energy for the body. Bread is made from grains, which are high in carbohydrates. Potatoes are starchy vegetables and are also rich in carbohydrates. Pasta, typically made from wheat flour, is another example of a food that contains carbohydrates. Therefore, all the options listed in the question (bread, potato, and pasta) contain carbohydrates.

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9.

Which of the following four food items is the best source of vitamin C?
- A.
  
  Citrus fruit
- B.
  
  Potatoes
- C.
  
  Meat
- D.
  
  Fresh garden peas
Correct Answer
A. Citrus fruit

Explanation
Citrus fruits are the best source of vitamin C because they are known for their high content of this nutrient. They include fruits like oranges, lemons, and grapefruits, which are all rich in vitamin C. Vitamin C is essential for the growth, development, and repair of body tissues, as well as for the formation of collagen, absorption of iron, and maintenance of a healthy immune system. While potatoes, meat, and fresh garden peas also contain some vitamin C, citrus fruits have the highest concentration, making them the best choice for obtaining this important vitamin.

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10.

Which of the following is essential to a balanced diet?
- A.
  
  Carbonates
- B.
  
  Hydrocarbates
- C.
  
  Carbohydrates
- D.
  
  Hydrates
Correct Answer
C. Carbohydrates

Explanation
Carbohydrates are essential to a balanced diet because they provide the body with energy. They are the main source of fuel for the brain and muscles. Carbohydrates are broken down into glucose, which is used by the body for various functions. They also provide important nutrients and fiber. Without carbohydrates, the body would not have enough energy to perform daily activities and maintain overall health.

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11.

Is [your statement here] true or false?
- A.
  
  True
- B.
  
  False
Correct Answer
A. True