Biomolecules & Transport across membrane

Iodine solution can be used to test the presence of _________

• Glucose

• Proteins

• Starch

• Sucrose

Which of the following equipment is used to maintain temperature at a constant level for an experiment using test tubes and solutions in it?

• Microwave oven

• Stove

• Air conditioner

• Water bath

Which of the following is not a reducing sugar?

• Glucose

• Fructose

• Sucrose

• Galactose

Which reagent is used to test for the presence of reducing sugars?

• Biuret

• Benedict's

• Iodine solution

• Ethanol & water

What's the ideal temperature for Benedict's solution to work?

• 0

• 10

• 40

• 80

Which of the following shows positive result for the presence of proteins?

• Biuret regent shows blue colour after shaking with the given solution

• Benedict's reagent shows purple colour after shaking with the given solution

• Biuret regent shows purple colour after shaking with the given solution

• Biuret changes from purple to colourless after shaking with the given solution

An unknown food molecule is given in a solution. Benedict's reagent is added to the solution and then heated to 80 degree Celcius. The colour of the solution changed from blue to brick red. Which of the following statements correctly explains the content of the solution?

• The solution contains very small quantities of glucose

• The solution contains very high concentration of glucose

• the solution contains high concentration of starch

• The solution contains red food colour

Which of the following is an example of hydrolysis?

• Adding one molecule of water to split a disaccharide to two monosaccharides

• Making proteins using amino acids

• Using glucose to create glycogen

• Breathing in

Movement of molecules from a region of higher concentration to a region of lower concentration is called ________

• homeostasis

• hydrolysis

• condensation

• diffusion

Which of the following is the correct definition of osmosis?

• Movement of water molecules from region of high water potential to region of low water potential

• Movement of water molecules from region of high water potential to region of low water potential through a permeable membrane

• Movement of water molecules from region of high water potential to region of low water potential through a semi-permeable membrane

• Movement of water molecules from region of low water potential to region of high water potential through a semi-permeable membrane