Tag: lipids

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Questions Related to lipids

Multiple choice biology meaning of life chemical organization in living beings lipids proteins and their structure

The other name of fats is

  1. Lipids

  2. Proteins

  3. Carbohydrates

  4. Nucleic acids
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Proteins are the polymers of amino acids held together by peptide bonds and are also called as polypeptides. Carbohydrates (sugars) are polyhydroxy aldehyde or ketones or their derivatives. Nucleic acids are polymers of nucleotides held together by phosphodiester bonds. Fats are fatty acid derivatives and are one of the storage lipids. Thus, the correct answer is A.

Multiple choice biology meaning of life chemical organization in living beings lipids proteins and their structure

Most essential fatty acid is ..........

  1. Linoleic acid

  2. Oleic acid

  3. Arachidonic acid

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The most essential fatty acids are that fatty acids that are not synthesized in our body and must come from the food we eat. For example, Linoleic acid (Omega-6 fatty acid ) is a most essential fatty acid. Linolenic acid is found in vegetable oils such as sunflower, soybean, corn, and canola oils as well as nuts and seeds.
So, the correct answer is 'Linoleic acid'.
Multiple choice biology meaning of life chemical organization in living beings lipids proteins and their structure

In which of the following solvents lipids are found to be insoluble?

  1. Ether

  2. Water

  3. Chloroform

  4. Benzene
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lipids are compounds of carbon, hydrogen and oxygen where ratio of hydrogen and oxygen is less than that of water. Lipids are esters of fatty acids and alcohol which form emulsion with water but are soluble in organic solvents. Some of the common examples of lipids are butter, ghee, cholesterol, carotene etc.

Multiple choice biology meaning of life chemical organization in living beings lipids proteins and their structure

Lipids are insoluble in water because they are

  1. Neutral

  2. Zwitter ions

  3. Hydrophobic

  4. Hydrophilic
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lipids are hydrophobic means water hating. They are water insoluble. Lipids are non-polar molecules while water is polar molecule, so there is no way for water to attach to a lipid molecule. Instead, the non-polar lipids will bind to themselves, which is why oils and fats form droplets on the surface of water.

Multiple choice biology meaning of life chemical organization in living beings lipids proteins and their structure

Membrane phospholipids are

  1. Amphipathic

  2. Amphibolic

  3. Hydrophobic

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Membrane phospholipids are amphipathic having a polar head made of phosphate residue and a non-polar lipid tail. The polar phosphate head is exposed on the surface while non-polar lipids are embedded within the interior of membrane.

Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

Which tissue is responsible for providing insulation to the body?

  1. Epithelial tissue

  2. Adipose tissue

  3. Fibrous connective tissue

  4. Nervous tissue

  5. Muscle tissue
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Adipose tissue, or fat, is an anatomical term for loose connective tissue composed of adipocytes. Its main role is to store energy in the form of fat, although it also cushions and insulates the body.

Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

The greatest amount of energy per gram is produced by

  1. Sugar

  2. Starch

  3. Fat

  4. Proteins

  5. Vitamins
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Our food contains three main constituents: carbohydrates, fats and proteins. The amount of energy released when one gram of any of these food elements is burned is known as calorific value. Thus calorific value of food indicates as to how much is the energy value of food which the human body can gain through metabolism. It is usually given in kcal/gm. Fats form the most concentrated source of energy in our diet. 1 gram of fat yields 9.5 kcal of energy which is the highest among the food components. 1 gram of carbohydrates and proteins yield almost similar amount of energy which is equal to 4 kcal.
Thus, the correct answer is option C.
Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

Which is used for staining lipids?

  1. Rhodamine

  2. Iodine

  3. Ethidium bromide

  4. Sudan Red
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Lipids are the compound formed by alcohol and fatty acids ester linkage. They are characterized by solubility in the organic solvent. Sudan Red dye is used to stain lipids. It is water insoluble but dissolves with fats. Therefore, dye accumulates in the globules within the cells. Thus, the correct option is  D.

Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

Study the given statement and select the correct answer  

  1. Lipids are micromolecules but obtained under-macromolecular fraction due to their insoluble nature in aquous medium of a cell.

  2. water is the most aboundant chemical in living organism

  3. First respiratory substrate = Lipid

  4. DIhydroxy acetone occur in d and I form.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lipids are technically micromolecules (low molecular weight), but they are extracted in the acid-insoluble fraction because they form vesicles that precipitate with cell debris.

Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

Identify the statement which is incorrect about absorption of lipids.

  1. The lipids are absorbed in laymp capillaries present with the villi

  2. From the micelles ,fatty acids and glycerol are absorbed into the intestinal cells by active transport

  3. Micelles are formed with the help of bile salts and phospholipids in intestinal lumen

  4. The lacteals after absorption of lipids contains chyle
Reveal answer Fill a bubble to check yourself
B Correct answer