FBISE Class 9th (SSC-l)
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Total MCQs
FBISE Class 9th (SSC-l)
Answer: The digestive system breaks down food mechanically and chemically into absorbable simple substances.
Answer: The brain, spinal cord and nerves form the nervous system that coordinates body activities.
Answer: Blood cells are formed mainly in the red bone marrow present inside bones.
Answer: Plasma is the fluid that carries digested food, hormones, gases and waste products in the blood.
Answer: Epithelial tissue has no blood vessels of its own; it gets nutrients by diffusion from underlying tissues.
Answer: The heart is a muscular organ that pumps blood through the circulatory system.
Answer: The muscular system produces movement as its muscles contract and relax.
Answer: The skeleton supports the body and protects vital organs such as the brain, heart and lungs.
Answer: Ovaries and testes are the reproductive organs that produce gametes and sex hormones.
Answer: Cardiac muscle is involuntary and striated, and its branched fibres are joined by intercalated discs.
Answer: Molecular biology deals with the structure and function of biomolecules such as carbohydrates, proteins, lipids and nucleic acids.
Answer: Carbohydrates have the general formula Cn(H2O)n, represented by the unit CH2O.
Answer: Monosaccharides are single sugar units and represent the simplest carbohydrates.
Answer: Sucrose forms by the condensation of one molecule each of glucose and fructose.
Answer: Glucose is a reducing sugar and gives a positive Benedict's test, whereas sucrose and starch are non-reducing.
Answer: Glucose is the sugar found in the blood and supplies immediate energy to the body.
Answer: Saturated fatty acids have only single bonds, giving straight chains that pack tightly together.
Answer: Sucrose is a disaccharide made of glucose and fructose joined together.
Answer: Quaternary structure results when multiple polypeptide subunits assemble, as in hemoglobin.
Answer: Fats yield about 9.3 kilocalories per gram, more than twice the energy of carbohydrates or proteins.