Tag: evs - i

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Various types of crystals of calcium carbonate or oxalate are reported in certain families which can also be regarded as aid to taxonomy. Crystals of gypsum are present either singly or in clusters in

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Tomarix dioica

  2. Ficus benghalensis

  3. Momordica charantia

  4. Nymphaea sp.

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Correct Option: B
Explanation:

Crystals of calcium oxalate, starch grains, stone cells with lignified walls, brown tannin cells, and crystals of gypsum are present in the cells of Ficus benghalensis, they belong to family Moraceae. The presence of different crystals is the characteristic feature that distinguishes families from each other.

So, the correct option is 'Ficus benghalensis'.

Which of the following categories of macromolecules includes representatives that  frequently serve as energy storage molecules?

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Proteins

  2. Lipids

  3. Carbohydrates

  4. Both lipids and carbohydrates

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Correct Option: D
Explanation:

Energy storage molecules are those molecules which store energy in the form of covalent chemical bonds. Some molecules like glycogen (carbohydrate) and triglycerides (lipids) are synthesized by the cells and they are stored for the later release of energy. So, the correct answer is "both lipids and carbohydrates".

Which solids are composed of inorganic compounds, usually oxides of chemical elements?

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Ceramics

  2. Metals

  3. Minerals

  4. Wood

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Correct Option: A
Explanation:

Ceramic solids are composed of inorganic compounds, usually oxides of chemical elements. They are chemically inert, and often are capable of withstanding chemical erosion that occurs in an acidic or caustic environment. 

Which biomolecule is made up of long chain of amino acids?

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Lipids

  2. Proteins

  3. Carbohydrates

  4. Nucleic acids

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Correct Option: B
Explanation:

Proteins are the polymers of amino acids held together by peptide bonds. Carbohydrates are polyhydroxy aldehyde or ketones or their derivatives. Nucleic acids are polymers of nucleotides held together by phosphodiester bonds. Lipids are the chemically diverse group and mostly have long hydrocarbon chain. Thus, the correct answer is B.

Amino acids form the monomeric units of 

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Amylase

  2. Glycogen

  3. Phospholipid

  4. Polysaccharide

  5. Ribonucleic acid

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Correct Option: A
Explanation:

Amylase is peptide hormone and consists of amino acids as monomer subunit. Glycogen is homopolysaccharide of D-glucose while lipids having attached phosphate groups are called as phospholipids. Polysaccharides are polymers of simple sugars (single polyhydroxy aldehyde or ketone unit). Ribonucleic acid is a polymer of ribonucleotide monomers. Thus, the correct answer is A.

Which of the following is not a mineral?

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Feldspar

  2. Mica

  3. Quartz

  4. Peat

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Correct Option: D
Explanation:

Solution:- (D) Peat

Peat is an organic material formed from the incomplete decomposition of plant matter under anaerobic conditions.

Which of the following statements is (are) correct?

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. All minerals cannot be an ore

  2. All ore cannot be a mineral

  3. All minerals are ores

  4. All ores are minerals

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Correct Option: A,D
Explanation:

All ores are minerals but vice-versa is not true.

The element present in the largest amount in rocks and minerals is_________.

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Silicon

  2. Carbon

  3. Hydrogen

  4. Gold

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Correct Option: A
Explanation:

Silicon are the most abundant elements in the earth's crust. All the rocks and minerals are composed of it.

Stalactites are :

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Thin, finger like mineral deposits hanging on the roofs of the caves.

  2. The mineral deposits that are left on the floor of the caves when water evaporates

  3. The mineral deposits found in mines

  4. Pure minerals extracted from the ores.

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Correct Option: A
Explanation:

A stalactile is a type of formation mineral that hangs from the ceilings of caues hot springs and other.

Which of the following is a non-metallic mineral?

evs - i constituents of food minerals in our diets types of nutrients nutrients and deficiency

  1. Petroleum

  2. Feldspar

  3. Gypsum

  4. Hematite

Show answer
Correct Option: A
Explanation:

Petroleun is a liquid mixture of hydrocarbons which is present in suitable rock strata and can be extracted and refined to produce fuels including petrol, paraffin, and diesel oil; oil.
Feldspar is an abundant rock-forming mineral typically occurring as colourless or pale-coloured 
Gypsum is a soft white or grey mineral consisting of hydrated calcium sulphate.
Hematite is a reddish-black mineral consisting of ferric oxide.