Science Group
Explore subjects and practice MCQs
10
Chapters
1,000
Total MCQs
FBISE Biology
Answer: DNA stores hereditary information that determines the inherited characteristics of an organism.
Answer: Nitrogen from the amino groups is characteristic of proteins and is absent from carbohydrates and fats.
Answer: Glucose is the main energy source of cells and is oxidized during cellular respiration.
Answer: RNA contains ribose, a five-carbon sugar with an extra hydroxyl group compared to deoxyribose.
Answer: Transfer RNA carries an anticodon that pairs with the codon on mRNA during translation.
Answer: Vitamins are organic compounds required in small amounts to prevent deficiency diseases.
Answer: Zinc is a trace mineral required in very small amounts for enzymes and immune function.
Answer: Fructose is the sweetest of all naturally occurring sugars.
Answer: Insulin is a protein hormone that regulates blood glucose levels.
Answer: A condensation reaction joins amino acids and releases a molecule of water to form a peptide bond.
Answer: Sucrose is a disaccharide, while glucose, fructose and galactose are monosaccharides.
Answer: Thyroxine is a thyroid hormone whose structure contains iodine.
Answer: DNA exists as a double helix, resembling a twisted ladder.
Answer: Cholesterol is a steroid lipid found in animal cell membranes and used to make hormones.
Answer: Fluorine helps harden tooth enamel and reduces the risk of dental caries.
Answer: Keratin is a fibrous structural protein found in skin, hair and nails.
Answer: Water is polar, so it dissolves salts, sugars and many other substances easily.
Answer: DNA consists of two strands wound around each other to form a double helix.
Answer: Sodium ions are essential for conducting nerve impulses and regulating fluid balance.
Answer: Adenine pairs with thymine through two hydrogen bonds in the DNA double helix.