Silk consists of
a) Central core of sericin b) Central core of fibroin
c) Both (a) and (b) d) A fine mixture of fibroin and sericin
Which statement regarding coenzyme is incorrect?
a) Every coenzyme is a cofactor and every cofactor is a coenzyme
b) Every coenzyme is a cofactor but every cofactor is not a coenzyme
c) Most of the coenzymes are nucleotides and are composed of vitamins
d) Coenzymes are the active constituents of enzymes
The rate of the reaction doubles or decreases by half, for every… °C change in either direction
a) 10° b) 15° c) 20° d) 27°
Enzyme often have additional parts in their structures that are made up of molecules other than proteins. When this additional chemical part is an organic molecule, it is called
a) Cofactor b) Coenzyme c) Substrate d) Both (a) and (b)
Which one is imino acid?
a) Pepsin b) Proline c) Cysteine d) Rennin
The sum total composition of acid soluble and acid insoluble fraction pool represents the
a) Molecular b) Dead cells c) Gene library d) Cellular pool
The ‘lock’ and ‘key’ model of enzyme action illustrates that a particular enzyme molecule
a) May be destroyed and resynthesised several times
b) Interacts with a specific type of substrate molecule
c) Reacts at identical rates under all conditions
d) Forms a permanent enzyme-substrate complex
Which of the following is an isozyme?
a) α-amylase b) Glucokinase
c) Lactic dehydrogenase d) All of these
Primary metabolites play known roles in
a) Ecology b) Chemical process
c) Human welfare d) Physiological process
Sucrose, a common table sugar is composed of
a) Glucose and fructose b) Glucose and galactose
c) Fructose and galactose d) None of the above
Double sugar is
a) Table sugar b) Milk sugar
c) Sugar in germinating seeds d) All of the above
Variety of amino acids are formed on the basis of
a) Position of hydroxyl group b) Position of carboxyl group
c) Position of hydrogen d) Nature of R group
Carbohydrates, the most abundant biomolecules earth, are produced by
a) All bacteria, fungi and algae
b) Fungi, algae and green plant cells
c) Some bacteria, algae and green plant cells
d) Viruses, fungi and bacteria
The ‘Repeating unit’ of glycogen is
a) Fructose b) Mannose c) Glucose d) galactose
Every chemical (metabolic) reaction is a … reaction
a) Induced b) Reversible c) Catalysed d) Spontaneous
Which of the following secondary metabolites are used as drugs?
a) Vinblastin and curcumin b) Anthocyanin
c) Gums and cellulose d) Abrin and ricin
One of the major feature of metabolic reaction is that they are…
a) Elementary reactions
b) Non-linked reactions
c) Heat evolving reactions
d) Catalysed reactions
Which of these is not a ketone body?
a) Acetoacetic acid b) Acetone
c) Succinic acid d) Betahydroxy butyric acid
Choose the correct statement
a) The living state is a non-equilibrium steady state to be able to perform work
b) The constant flow of material for energy in and out of cell prevent the cell from reaching equilibrium
c) Living state and metabolism are synonyms
d) All are correct
Pick out the wrong statement
a) Amino acids are substituted methanes
b) Glycerol is a trihydroxy propone
c) Lysine is a neutral amino acid
d) Lecithin is a phospholipid
Each active sites in enzyme is bounded by how many amino acids?
a) 20 b) Infinite c) 3 d) None of these
Select the wrong statement
a) Proteins are heteropolymers made of amino acids
b) Ribozymes are nucleic acids with catalytic power
c) Nucleic acids serve as genetic material
d) Collagen is the most abundant protein in the whole of the biosphere and Rubisco is the most abundant proteins in animal world.
The simple polyhydroxy ketone molecule containing 3-7 carbons is a
a) Disaccharide b) Monosaccharide c) Polysaccharide d) dipeptide