Tag: biology

Questions Related to biology

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

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

  1. Polysaccharide and Water

  2. Fat and Polysaccharide

  3. Protein and fat

  4. Fat and Protein

Show answer
Correct Option: A
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'.

Which is odd - 

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

  1. chitin carbohydrates

  2. Pectin proteins

  3. Steriod lipid

  4. Wax lipid

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Correct Option: A
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'.

Which of the following sugar is found in GTP?

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

  1. Ribose

  2. Glucose

  3. Deoxyribose

  4. Erythrose

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Correct Option: A
Explanation:

The pentose sugar present in guanosine is ribose  The base attaches to the carbon no.1 and the phosphate bonds to carbon no. 5.

So, the correct option is 'Ribose'.

The polysaccharide with 200 - 1000 glucose units helds by a (1 \rightarrow 4) glycoside linkage only is 

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

  1. strach

  2. amylose

  3. amylopectine

  4. glycon

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Correct Option: A

Which among the following is disaccharide?

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

  1. Glucose

  2. Galactose

  3. Maltose

  4. Fructose

Show answer
Correct Option: C
Explanation:
  • A disaccharide is made up of two monomers.
  • Maltose is made up of two molecules of Glucose by O-glycosidic linkage.
  • So, the correct option is 'Maltose'.

What are carbohydrates?

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

  1. Aldehydic and ketonic derivatives.

  2. Polyhyrdroxy compounds.

  3. Optically active substances and hydrates of carbon.

  4. All of the above.

Show answer
Correct Option: D
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 .

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

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

  1. Cellulose, glucose

  2. Starch, glucose

  3. Glycogen, amylose

  4. Actin, amylopectin

Show answer
Correct Option: A
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.

Carbohydrates, the most abundant biomolecules on earth, are produced by

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

  1. All bacteria, fungi and algae.

  2. Fungi, algae and green plant cells.

  3. Some bacteria, algae and green plant cells.

  4. Viruses, fungi and bacteria.

Show answer
Correct Option: C
Explanation:
Carbohydrates are the most abundant bimolecules found on the surface of the earth. This is so because every year plants and alga through the process of photosynthesis converts more than 100 billion metric tones of carbondioxide and water to cellulose and other products for use by the plants. 

Carbohydrates which cannot be further hydrolysed into simple form are

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

  1. Monosaccharides

  2. Disaccharides

  3. Oligosaccharides

  4. Polysaccharides

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Correct Option: A
Explanation:

Simple carbohydrates are generally soluble sugars. Simpler carbohydrates are of two types Monosaccharides and Oligosaccharides. Monosaccharides are monomer sugars which cannot be hydrolysed further into smaller units, e.g., trioses, tetroses, pentoses, hexoses and heptoses. Oligosaccharides are made up of a few units of monosaccharides.

The substance which is synthesized in Golgi body is?

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

  1. Protein

  2. Polysaccharides

  3. Fats

  4. ATP

Show answer
Correct Option: B
Explanation:

The substance which is synthesized in golgi body is polysaccharides. Golgi is a part of the cellular endomembrane system, the Golgi apparatus packages proteins into membrane-bound vesicles inside the cell before the vesicles are sent to their destination. The Golgi apparatus resides at the intersection of the secretory, lysosomal, and endocytic pathways. It is of particular importance in processing proteins for secretion, containing a set of glycosylation enzymes that attach various sugar monomers to proteins as the proteins move through the apparatus.