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Energy from different food components - class-VII

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Sugars are not as good as fats as a source of energy for cellular respiration, because sugars.

  1. Produce toxic amino groups when broken down

  2. Contain more hydrogen

  3. Usually bypass glycolysis and the Krebs cycle

  4. Contain fewer hydrogen atoms and electrons


Correct Option: A
Explanation:

Sugars, when broken down, produces toxic amino groups. During Cellular Respiration, sugar is broken down to CO$ _2$and H$ _2$O, and in the process, ATP is made that can then be used for cellular work. Carbohydrates, fats, and proteins can all be used as fuels in cellular respiration, but glucose is most. In glycolysis, the 6-carbon sugar, glucose, is broken down into two molecules.

So the correct answer is 'Produce toxic amino groups when broken down'.

Which of the following is not directly dependent of a person's protein intake?

  1. Formation of enzymes

  2. Formation of glycogen stored in liver

  3. Production of antibodies in the immune system

  4. Production of muscle tissues


Correct Option: B
Explanation:

Considering all the four options we find that Enzymes, Antibodies and Muscle tissue all are made up of amino acids as their basic structural component only the glycogen stored in the liver is made up of monosaccharides as it's structural component. So, protein intake in the person will affect the formation of enzymes, antibodies and muscle tissue but will not affect the Glycogen stores in the Liver.

So, the correct answer to the question is 'Formation of the glycogen store in the liver'. 

A person is eating rice. His food contains

  1. Cellulose

  2. Starch

  3. Lactose

  4. Protein


Correct Option: B
Explanation:

Cereals like wheat, rice, maize etc., are good source of carbohydrates. They contain starch as reserve food in their endosperm. The starch is a polymer of glucose.

Meat, milk and eggs mainly supply us with

  1. Hormones

  2. Carbohydrates

  3. Proteins

  4. Fats


Correct Option: C
Explanation:

Proteins are the major body building biomolecules. Proteins serve a variety of structural and functional roles. Meat, milk and eggs are an important source of proteins. Soybean and other pulses are an important source of plant proteins.

Man needs carbohydrates as a source of energy and gets these from

  1. Starch

  2. Cellulose

  3. Both A and B

  4. None of the above


Correct Option: A
Explanation:

Carbohydrates are a source of energy and primary cellular fuel. Cereals like rice, wheat, maize are a primary source of carbohydrate for man. Humans can digest starch present in cereals but not cellulose. Hence, dietary starch is broken down into glucose inside the body which provides us with energy.

Therefore, the correct answer is option A.

Which of the following has maximum proteins?

  1. Rice

  2. Wheat

  3. Gram

  4. Soyabean


Correct Option: D
Explanation:

Rice and Wheat are cereals belonging to Family Poaceae. They are rich in carbohydrates. Gram and Soybean are legumes of Family Leguminosae. Legumes are rich in proteins. Soyabean is also an important oilseed crop. Among legumes Soyabean are richest source of proteins. Together, soyabean oil and protein content account for about 60% of dry soyabeans by weight (protein at 40% and oil at 20%).

Which of the following plants are rich sources of dietary protein?

  1. Cajanus cajan

  2. Solanum nigrum

  3. Tridax procumbens

  4. Oryza sativa


Correct Option: A
Explanation:

Cajanus cajan is a puise seed crop and belongs to family Leguminosae. Its english name is pigeon pea and is commonly called Arhar or Toor in hindi. Being a pulse seed crop it is rich in proteins.

In whose milk, percentage of lactose is highest?

  1. Human mother

  2. Cow

  3. She buffallo

  4. She goat


Correct Option: A
Explanation:

The percentage of lactose in milk varies with species. Human milk has a high lactose content, the percentage of lactose in human milk ranges from 6.5 to 7.5%. Unprocessed cow milk has about 4.7% lactose, unprocessed goat milk has about 4.7% lactose, unprocessed buffalo milk has about 4.86% lactose. The average in cow and goat milk is less than 5% and vary according to the breed. When human babies are reared on cow or goat milk, it is customary to add lactose, sucrose, glucose, or malto-dextrin in their feed.

Excessive intake of alcohol causes

  1. Jaundice

  2. Dermatitis

  3. Liver cirrhosis

  4. Lung Fibrosis


Correct Option: C
Explanation:

Cirrhosis is an abnormal liver condition in which there is irreversible scarring of the liver. People with cirrhosis may develop jaundice, itching and extreme tiredness. When liver tries to break down alcohol, the resulting chemical reaction damage its cells. This damage can lead to inflammation and scarring as the liver tries to repair itself.

The most common concentrated source of proteins for vegetarians in our country is

  1. Potatoes

  2. Meat

  3. Eggs

  4. Pulses


Correct Option: D
Explanation:

Meat, eggs and pulses are good sources of proteins. Proteins are body building substances and are an important part of a balanced diet. For vegetarian people pulses can be a good source of proteins. Our country produces a variety of 'dals' and these can be consumed as protein sources.

To get ample supply of carbohydrates, one should eat

  1. Meat

  2. Gram

  3. Carrots

  4. Rice


Correct Option: D
Explanation:

Carbohydrates provide us energy and are the primary cellular fuel. Carbohydrates can be simple sugars or polymers like cellulose and starch. Cereal grains like rice, wheat, maize etc. are rich in carbohydrates.

Another substance of the category of glucose, sucrose and maltose is

  1. Myoglobin

  2. Starch

  3. Amino acids

  4. Haemoglobin


Correct Option: B
Explanation:

Carbohydrates provide us with energy. Carbohydrates can be monosaccharides (composed of one monomer unit only like glucose, fructose etc.), disaccharide (composed of two monomer units like maltose which is made up of two units of glucose; sucrose made up of one unit of glucose and one unit of fructose) or polysaccharide (made up of multiple monomer units example starch which is composed of multiple units of glucose).

In mammals, carbohydrates are stored in the form of

  1. Lactic acid in muscles

  2. Glycogen in liver and muscles

  3. Glucose in liver and muscles

  4. Glycogen in liver and spleen


Correct Option: B
Explanation:

Carbohydrates can be stored in body for subsequent use. Starch is an important storage polysaccharide in plants and glycogen is an important storage polysaccharide in animals. Both starch and glycogen are homopolymers of glucose.

What is called a guide of healthy foods which is divided into sections ?

  1. Flow chart

  2. Food guide pyramid

  3. Nutrient guide

  4. Food guide tree


Correct Option: B
Explanation:

The food guide pyramid is a pyramid-shaped guide of healthy foods divided into sections. Each section shows the recommended intake for each food group (i.e. Protein, Fat, Carbohydrates, and Sugars). Therefore, (b) is the correct answer.

Fish flour is rich in

  1. Fat

  2. Protein

  3. Vitamins

  4. Minerals


Correct Option: B
Explanation:

Fish flour is a source of amino acids and vitamin with very high protein content, made of fresh sea fish or unprocessed fish wastes. Due to its rich nutritional content, it is the most important material in the rations of barn animals, poultry and fish and is commonly used in the feed industry.


So, the correct option is 'Protein'.

During prolonged fasting, the sequence of organic compounds used by body is

  1. Carbohydrates, fats, proteins

  2. Fats, carbohydrates, proteins

  3. Carbohydrates, proteins, lipids

  4. Proteins, lipids, carbohydrates


Correct Option: A

The commonly used artificial sweetener is

  1. Acesulfame K

  2. Cyclamate

  3. Aspartame

  4. Saccharin


Correct Option: C
Explanation:

The most commonly used artificial sweetener is aspartame. It was discovered by James M. Schlatter in 1965. It is used for deserts. It is used as a sugar substitute. It is not suitable for baking, as high temperatures it breaks it into its constituent amino acid. So, the correct answer is option C.

Caloric value of carbohydrate per gram is

  1. 9.45 kcal

  2. 5.65 kcal

  3. 4.1 kcal

  4. 9.0 kcal


Correct Option: C

Palm oil is extracted from

  1. Glycine

  2. Gossypium

  3. Elaeis

  4. Olea


Correct Option: C
Explanation:

Palm oil is derived from the mesocarp of the fruit named Elaeis guineensis which is an African oil palm.

So the correct option is C.

The botanical name of Olive is

  1. Olea europea

  2. Ricinus communis

  3. Carthamus victorious

  4. Mentha priority


Correct Option: A
Explanation:

The botanical name of Olive is "Olea europaea" meaning "European olive". It is a small tree belonging to the family Oleaceae.

So the correct option is A.

A genus of ornamental plants which is being cultivated for extracting an important edible oil from its Cypsela fruits is

  1. Helianthus

  2. Brassica

  3. Sesamum

  4. Cocos


Correct Option: A
Explanation:

Sunflower/Helianthus annus is the ornamental plant that is cultivated commercially for the extraction of sunflower oil. The oil is extracted from its cypsela fruits.

So the correct option is A.

Ground nut oil is a

  1. Non-drying oil

  2. Essential oil

  3. Drying oil

  4. None of the above


Correct Option: A
Explanation:

non-drying oil is the one which does not harden when exposed to air whereas drying oil hardens through polymerization.

The non-drying oils include almond oil, coconut oil, groundnut oil etc and the drying oils include poppy seed oil, walnut oil, linseed oil, etc.
So the correct option is A.

Low calories and low cholesterol is found in

  1. Soybean oil

  2. Groundnut oil

  3. Sheesham oil

  4. Sunflower oil


Correct Option: D
Explanation:

Sunflower (Helianthus annuus) oil is the only oil that has low calories and low cholesterol and so it is best for heart patients.

So the correct option is D.

Sesamum indicum, from which sesame oil is obtained, belongs to the family

  1. Meliaceae

  2. Euphorbiaceae

  3. Cruciferae

  4. Pedaliaceae


Correct Option: D
Explanation:

Sesamum indicum (i.e sesame) is a herbaceous annual plant of the Pedaliaceae family.

So the correct option is D.

The fleshy mesomorph of a plant is the source of palm oil which is now in common use as an edible oil. This plant is known by the botanical name

  1. Metroxylon rumphii

  2. Elaeis guineensis

  3. Phoenix sylvestris

  4. Calamus rotung


Correct Option: B
Explanation:

Palm oil is derived from the mesocarp of the fruit named Elaeis guineensis which is an African oil palm.

So the correct option is B.

Castor oil is obtained from

  1. Ricinus communis

  2. Brassica campestris

  3. Azadirachta indica

  4. Sesamum indicum


Correct Option: A
Explanation:

Castor oil is obtained from the seeds of the "Ricinus communis" plant. 

So the correct option is A.

In a digestion tank, produced gases has a high

  1. Calorific value

  2. density

  3. Gas Value

  4. Digestion Value


Correct Option: A

Energy value per gram of alcohol is

  1. $4\ kcal$

  2. $4.3\ kcal$

  3. $9.3\ kcal$

  4. $7.1\ kcal$


Correct Option: D
Explanation:

Just like any food or drink, alcoholic drinks contain energy or calories. There are 7 calories per gram of alcohol (29kJ). A 'standard' alcoholic drink or 'unit' contains 8 grams of alcohol, which is equal to 56 calories from the alcohol alone. 

So, the correct answer is '7.1 kcal'.

Which is useful in human beings?

  1. Cholesterol

  2. Animal fat

  3. High density lipoprotein cholesterol

  4. Low density lipoprotein cholesterol


Correct Option: C
Explanation:

Molecules called lipoproteins to carry cholesterol in the blood. Two important kinds of lipoproteins are low-density lipoprotein (LDL) and high-density lipoprotein (HDL). LDL cholesterol is often referred to as "bad cholesterol" because too much is unhealthy. HDL is often referred to as “good cholesterol” because it is protective.

So, the correct answer is 'High-density lipoprotein cholesterol'.

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