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WorksheetsCHEMICALS IN LIFE
Total questions: 10
Worksheet time: 2mins
Which observation is made when a food substance contains lipids and has been tested using emulsion test?
A permanent translucent spot formed
A white emulsion formed
A colourless solution formed
No colour change
Which observation is made when a food substance contains lipids and has been tested using grease spot test?
A permanent translucent spot formed
A white emulsion formed
A colourless solution formed
No colour change
Which reagents are used to test for proteins?
Sodium hydroxide solution and copper (II) sulphate solution
Ethanol
Filter paper
Iodine solution
Which bond is formed when amino acids combine?
Ionic bond
Metalic bond
Dipeptide bond
Ester bond
Which bond is formed when glycerol and fatty acids combine?
Ionic bond
Metalic bond
Dipeptide bond
Ester bond
Which of the following is not a function of proteins?
Source of energy
Metabolic regulators
Heat insulator
Structural function
Which of the following is not a property of an enzyme?
Are substrate specific
Are protein in nature
Are efficient in small amounts
They are not affected by temperature above the optimum
Which of the following factors does not affect enzyme controlled reactions?
pH
Light
Temperature
Specificity
Which colour indicates that proteins are present in a food substance when tested?
Blue black
White emulsion
Purple
Green to yellow to orange and finally brown
Which of the following combination is used to name enzymes?
Trivial naming and use of suffix-ase
Trivial naming and use of suffix-ese
Driviall naming and use of suffix-ase
Trial naming and use of suffix-ase
