Biology MCQ

Which enzyme is needed to digest food reserve in castor seed?

Co-enzyme is ________

Difference between DNA and RNA is because of

Which of the following is a simple protein?

In enzyme kinetics, Km = Vmax/2. If Km value is lower, it indicates _______

When inorganic ions or metallo-organic molecules bind to apoenzyme, they together form

Hemoglobin is a type of ________ protein, which plays indispensable part in respiration.

Linoleic, Linolenic and ________ acids are referred as essential fatty acids since they cannot be synthesized by the body and hence must be included in daily diet.

Lipids associated with cell membrane are _________ .

Amino acids in a polypeptide are joined by _______ bond.

Glycosidic bond is found in __________ .

Sugar, amino acids and nucleotides unite to their respective subunits to form ________

Which of the following are NOT polymeric?

Which one of the following statements is correct with reference to enzymes?

The two functional groups characteristic of sugars are

Which one of the following carbohydrates is a heteropolysaccharide?

Concanavalin A is:

Consider the following statements:
1. Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group.
2. A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme. Select the correct option.

Prosthetic groups differ from co-enzymes in that –

Morphine, the first alkaloid isolated from ________

The _______ action of enzyme with a substrate is explained by lock and key theory.

Majority of cellular enzymes function best at _______ PH.

Out of the following, which is not a property of enzymes?

As temperature changes from 30° to 45° C, the rate of enzyme activity will

The enzyme functions best at temperature

________ are also known as dehydrogenases.

Metal cofactors are also known as?

_______ catalyze interconversions of geometric, optical and positional isomers.

________ catalyze hydrolysis of ester, ether etc.

Smallest RNA is

Which RNA is present in more amount in the cell?

RNA is genetic material in

The two strands of DNA are

Find the odd one.

Nucleotides, the polymers of nucleic acid are joined together by __________ bond.

A nucleotide contains

Keratin is a ________ protein.

Protein is

Proteins are formed by the condensation of

Proteins are linear polymers of

Fatty acids which do not contain double bond between carbon atoms are

Simple lipids are esters of

________ are water insoluble and small molecular weight compounds as compared to macromolecules.

Polysaccharides consist of

Sugar present in milk is

A disaccharide that gives two molecules of glucose on hydrolysis is

In a disaccharide, monomers are linked with each other through ________ bonds.

Common examples of hexose sugar is/are

Deoxyribose sugar is an example of

The simplest monosaccharide made up of three carbons amongst the following is

Which of the following do not give smaller sugar units on hydrolysis?

In which of the following, the ratio of hydrogen and oxygen atoms is 2:1?

Carbohydrates are composed of

Most common constituents of organic compounds found in organims are