Biology/Biology MCQ Question - Biological Molecules Sample Test,Sample questions

Question:
% of Glucose normally present in our blood is

1.0.80%

2.0.08%

3.1.80%

4.8%


Question:
% of water in brain cells is

1.20%

2.80%

3.85%

4.90%


Question:
?- helical structure is kept by the formation of _____ bonds among amino acids molecules.

1.H bonds

2.Disulphide Bond

3.Ionic bond

4.Hydrophobic bonds


Question:
A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called

1.Phosphodiester linkage

2.Glycosidic bond

3.Peptide bond

4.Hydrogen bond


Question:
A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called:

1.Lipid

2.Carbohydrate

3.Protein

4.Carotein


Question:
A compound produced as a result of a chemical reaction of an alcohol with an acid in which water molecule is released is called:

1.Monosaccharide

2.Fatty acid

3.Neutral lipid

4.Nucleic acid


Question:
Actin and myosin are the basic proteins involved in contractile machinery of our body to which type of proteins do they belong?

1.Globular proteins

2.Fibrous Proteins

3.Both a and b

4.None of these


Question:
An insulin molecule consists of _____ polypeptide chains.

1.1

2.2

3.3

4.4


Question:
Animals obtain carbohydrates mainly from

1.Glucose

2.Starch

3.Sucrose

4.Glycogen


Question:
Antibodies play important role against microorganisms and other pathogens to which type of proteins do they belong?

1.Globular proteins

2.Fibrous Proteins

3.Both a and b

4.None of these


Question:
ATP is a an important molecule for its major function

1.As an energy currency of the cell

2.As a coenzyme

3.Both a and b

4.None of these


Question:
Chemical component/s less in eukaryotic cell as compared to prokaryotic cell is / are (i) lipids (ii) carbodydrates (iii) proteins (iv) DNA

1.i & ii

2.iii & iv

3.i ii iii & iv

4.iv only


Question:
Cn(H2O)n. is a general formula of :

1.Monosaccharides

2.Oligosaccharides

3.Ploysacharides

4.Carbohydrates


Question:
Each turn of DNA contain _______ nitrogenous base pairs

1.5

2.10

3.20

4.25


Question:
Fatty acids containing 18 C atoms and a single double bond is

1.Saturated Fatty acid

2.Unsaturated fatty acid

3.Oleic Acid

4.Plamitic acid


Question:
For the synthesis of 10g of glucose ______ of energy is required:

1.717.6 Kcal

2.727 Kcal

3.737 Kcal

4.747 Kcal


Question:
Hemoglobin molecule exhibits which structural organization of proteins

1.Primary structure

2.Secondary structure

3.Tertiary structure

4.Quaternary structure


Question:
In an aqueous environment the most stable tertiary conformation is that in which ______ amino acids are buried inside the conformation.

1.Hydrophobic

2.Hydrophilic

3.Basic

4.None of these


Question:
In Glycin an amino acid R group is replaced by

1.H

2.CH3

3.COOH

4.C = O


Question:
Lipid molecules can store double amount of energy as compared to same amount of carbohydrate because of high number of

1.C-C bonds

2.C-H bonds

3.C-N bonds

4.C-O bonds


Question:
Lipids are soluble in which of the following :

1.Water

2.Ether

3.All solvents

4.Not in any of the above


Question:
Peptide bond is:

1.C-N link

2.C- O lind

3.N-H link

4.C-H link


Question:
Proteins are polymers of

1.Fatty acids

2.Isoprenoid units

3.Amino acids

4.Nucleotides


Question:
Proteins comprise of _____% of the total dry weight of a cell.

1.40%

2.50%

3.60%

4.70%


Question:
Ribose is an example of

1.Trioses

2.Tetroses

3.Pentose

4.Hexose


Question:
Specific heat of vaporization of water is:

1.574 Kcal/kg

2.674 Kcal/kg

3.774 Kcal/kg

4.874 Kcal/kg


Question:
Starch cellulose and glaycogen yield ________ on complete hydrolysis.

1.Maltose

2.Sucrose

3.Fructose

4.Glucose


Question:
The covalent bond between two monosaccharide subunits is called:

1.Phosphodiester bond

2.Peptide bond

3.Glycosidic Bond

4.Ionic bond


Question:
The element in basic structure of proteins which differentiate them from carbohydrates is

1.C

2.S

3.H

4.N


Question:
The number of calories required to raise the temperature of 1g of water from 15 to 16?C is called?

1.Specific Heat of Vaporization

2.Specific Heat capacity

3.Caloric Heat

4.Both A and C


Question:
The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is:

1.High specific heat of vaporization

2.High specific heat capacity

3.Its Dipole nature

4.Its liquid state


Question:
Total number of amino acids discovered so far in cells and tissues are

1.20

2.25

3.150

4.170


Question:
Total number of amino acids in a hemoglobin molecule are:

1.554

2.564

3.574

4.584


Question:
Which bond provides stability to complex carbohydrate molecules?

1.C-H

2.C-O

3.C-C

4.C-N


Question:
Which of the following carbohydrate can not be hydrolysed?

1.Monosaccharide

2.Oligosaccharide

3.Polysaccharide

4.None of these


Question:
Which of the following carbohydrate is tasteless?

1.Monosaccharide

2.Oligosaccharide

3.Polysaccharide

4.None of these


Question:
Which of the following does not show quaternary structure?

1.Haemoglobin

2.Pepsin

3.Fibrin

4.Insulin


Question:
Which of the following polysaccharide is called animal starch?

1.Starch

2.Glycogen

3.Cellulose

4.None of these


Question:
Which of the following statement is incorrect5 for fats containing unsaturated fatty acid?

1.They contain double bond

2.They are usually solid at room temperature

3.They are lighter than water

4.Their specific gravity is less than 1


Question:
Which of the following substance is most favorable to form structural component of biological membranes?

1.Hydrophilic Carbohydrates

2.Hydrophobic fats.

3.Both a and b

4.None of these


Question:
Which of the statement is not true for compounds like glycoprotein and glycolipids?

1.They are conjugated molecules of carbohydrates

2.Both have role in the extra cellular matrix of animals and bacterial cell wall

3.They are components of biological membranes.

4.Both are produced and secreted by endoplasmic reticulum


Question:
Which one are most complex sugar:

1.Monosaccharides

2.Oligosaccharides

3.Polysaccharides

4.None of these


Question:
Which one gives blue colour with iodine?

1.Starch

2.Glycogen

3.Cellulose

4.Polysaccharide


Question:
Which one is abundant in animals?

1.Starch

2.Glycogen

3.Cellulose

4.None of these


Question:
Which one is soluble in hot water?

1.Starch

2.Glycogen

3.Amylose

4.Amylopectin.


Question:
Which one the following fatty acid is more soluble in an organic solvent and has higher melting point?

1.Acetic acid

2.Butyric acid

3.Palmitic acid

4.All have same


Question:
Which statement is true about an aqueous medium:

1.Ionic as well as non ionic substance in aqueous media retains their identity.

2.Enzymes can not perform catalysis reaction in this medium.

3.Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions.

4.It is less favorable media for chemical reactions.


Question:
Which structural organization is most common in globular proteins?

1.Primary

2.Secondary

3.Tertiary

4.Quaternary


Question:
Which structure of protein gives information aboutnumber and sequence of amino acids in it?

1.Primary structure

2.Secondary structure

3.Tertiary structure

4.Quaternary structure


Question:
_________ is example of pure form of cellulose

1.Silk

2.Wool

3.Cotton

4.Paper


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