Biology Animal nutrition

What element is generally absent in carbohydrates?

• Carbon

• Hydrogen

• Oxygen

• Nitrogen

Which one of the following is a complex carbohydrate

• Galactose

• Maltose

• Glycogen

• Sucrose

Which of the solution is used to test reducing sugar?

• Benedict Solution

• Biuret Reagant

• Ethanol

• Iodine Solution

What is the colour change when a large amount of reducing sugar is tested with a Benedict Solution?

• It turns brick-red

• It turns blue

• It turns green

• It turns lilac

What happens to the iodine solution if starch is not present in the tested sample?

• Remains yellow

• Turns yellow

• Turns blue-black

• Remains blue-black

Why do the villi have long, finger like projections?

• to reduce the thickness of barrier for faster absorption

• to maintain concentration gradient across the intestinal wall

• to increase the thickness of barrier for faster absorption

• to increase the surface area to volume ratio for faster absorption

State the structure present on epithelial cells of the villi, which helps to further increase the surface area to volume ratio

(a)  

State the name of substance involved in emulsification process?

(a)  

What range of pH level is suitable for the action of salivary amylase?

• pH 1-2

• pH 3-4

• pH 5-6

• pH 6-7

What substrate do salivary amylase break down?

• Protein

• Starch

• Maltose

• Fats