Tag: biological molecules

Quizzes (9) Questions (101)

Questions Related to biological molecules

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

Which carbohydrate is found in the exoskeleton, of insects and crabs?

  1. Starch

  2. Chitin

  3. Cellulose

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

Chitin is the substance which is fibrous and made up of the long-chain polymer of N-acetylglucosamine, is a derivative of glucose. It is a major constituent of the exoskeleton of arthropods, crabs and also make the cell wall of fungi.

Hence, the correct answer is 'Chitin'

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

Which of the following is primary metabolite?

  1. Carotenoid

  2. Glucose

  3. Morphine

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

  • Primary metabolites are those that are formed during the growth phase and supports in the overall development of cells. E.g., Carbohydrates, vitamins, proteins etc.
  • Secondary metabolites are those which are the end products of primary metabolites and are required for ecological activities of cells. E.g., Carotenoids, morphine etc. 
So, the correct option is 'Glucose'.

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

Which of the following have a glycosidic bond and hydrogen bond respectively?

  1. Polysaccharide and Water

  2. Fat and Polysaccharide

  3. Protein and fat

  4. Fat and Protein
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The glycosidic bond is a bond that holds a carbohydrate molecule with another group, which may or may not be a carbohydrate. Polysaccharides contain several monosaccharides that are linked to one another by glycosidic bonds. In water each water molecule binds four other water molecules by hydrogen bonds. This helps the water molecules to hold together (cohesion of water). 

So, the correct answer is ' Polysaccharide and Water'.

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

Which is odd - 

  1. chitin carbohydrates

  2. Pectin proteins

  3. Steriod lipid

  4. Wax lipid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chitin carbohydrates are the oldest in the given as it is a carbon-based factor. protein, lipids consist chain of nitrogen, hydrogen and carbon atoms however carbohydrate consists of a longer chain of carbon as well as various other groups of compounds. so, the correct option is 'chitin carbohydrates'.

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

What are carbohydrates?

  1. Aldehydic and ketonic derivatives.

  2. Polyhyrdroxy compounds.

  3. Optically active substances and hydrates of carbon.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbohydrates are polyhydroxy aldehydes and ketones. They have two functional groups alcohol and either aldehyde or ketone. Most common carbohydrates are compounds of carbon, hydrogen and oxygen where hydrogen and oxygen occur in the ration of 2:1 like water. Hence, carbohydrates are also called as hydrates of carbon. Carbohydrates have asymmetric carbon atoms, hence, carbohydrates are optically active and rotate the plane of polarised light .

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

The molecule of biological kingdom most abundant on earth is ...................... with ....................... monomers.

  1. Cellulose, glucose

  2. Starch, glucose

  3. Glycogen, amylose

  4. Actin, amylopectin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cellulose is the most abundant organic polymer on earth. Cellulose is an important structural component of the primary cell wall of green plants. Glucose is one of the primary molecules, which serve as energy sources for plants and animals. It is the most important simple sugar in human metabolism. Cellulose can be broken down chemically into its glucose units by treating it with concentrated acids at high temperature.