Science Group
Explore subjects and practice MCQs
10
Chapters
1,000
Total MCQs
FBISE Biology
Answer: Salivary amylase is an enzyme that begins breaking starch down into simpler sugars in the mouth.
Answer: Iodine is needed for thyroid hormone production, and its deficiency causes goiter.
Answer: Calcium and phosphorus form the hard mineral part of bones and teeth.
Answer: Iron is an essential component of hemoglobin, which carries oxygen in the blood.
Answer: Chitin is a structural polysaccharide that forms the hard exoskeleton of insects and crustaceans.
Answer: Water acts as a universal solvent in which many biochemical reactions of the body take place.
Answer: Ascorbic acid is the chemical name of vitamin C, found in citrus fruits and vegetables.
Answer: A water molecule consists of two hydrogen atoms and one oxygen atom, written as H2O.
Answer: Vitamin D deficiency causes rickets, a disease of weak and deformed bones in children.
Answer: The secondary structure (alpha-helix and beta-pleated sheet) is stabilized by hydrogen bonds.
Answer: Evaporation of sweat from the skin removes heat and cools the body.
Answer: Phospholipids form the bilayer that is the main structural component of cell membranes.
Answer: Humans lack cellulase, so cellulose passes undigested and provides roughage.
Answer: Animal fats are rich in saturated fatty acids whose straight chains pack tightly, making them solid.
Answer: Maltose is a disaccharide made of two glucose units joined by a glycosidic bond.
Answer: Oils are liquid at room temperature because they contain mostly unsaturated fatty acids.
Answer: Unsaturated fatty acids have one or more double bonds, which create kinks in the chain.
Answer: Proteins are digested into amino acids, which are absorbed and used to build new proteins.
Answer: Butter, meat and other animal products contain mostly saturated fatty acids.
Answer: The Biuret test gives a violet color when proteins are present.