lec quiz 1 final

What is crude fiber?

• A. A refined product from plants

• B. Total protein content in a plant

• C. The undigestible portion of plant material

• D. The amount of water a plant contains

Crude fiber mainly consists of:

• A. Cellulose and lignin

• B. Proteins and amino acids

• C. Sugars and vitamins

• D. Fats and oils

In maceration, the plant material is:

• A. Heated until it boils

• B. Soaked in a solvent at room temperature

• C. Frozen and crushed

• D. Dried in the sun

Which extraction method uses continuous hot solvent percolation?

• A. Filtration

• B. Maceration

• C. Soxhlet extraction

• D. Cold press

Why are swelling plant materials like mucilage-rich samples not suitable for direct percolation?

• A. They smell bad

• B. They block solvent flow by forming a sticky mass

• C. They dissolve completely

• D. They increase extraction speed

Which of the following plant-derived material tends to swell and block solvent flow in percolation?

• A. Ginger

• B. Psyllium husk

• C. Dried clove

• D. Dandelion root

Which part of the Soxhlet apparatus set up that holds the plant material?

• A. Condenser

• B. Boiling flask

• C. Thimble

• D. Filter funnel

Which type of solvent is commonly used in Soxhlet extraction?

• A. Highly viscous liquids

• B. Volatile and organic solvents like ethanol, ether or hexane

• C. Water only

• D. Glycerin

Piperine is an alkaloid primarily found in which spice?

• A. Turmeric

• B. Ginger

• C. Black pepper

• D. Cinnamon

Which of the following extraction techniques is most commonly used for extracting essential oils from plants?

• • A) Maceration

• • B) Cold Pressing

• • C) Steam Distillation

• • D) Soxhlet Extraction