Question 1Which of the following is not present in the nucleus of a cell? A.chromosomesB.NucleolusC.MitochondrionD.Genes. Objective Show full explanation
Question 2In aerobic respiration, oxidative phosphorylation takes place in the A.cytoplasmB.mitochondriaC.lysosomeD.ribosomes. Objective Show full explanation
Question 3The ability of organisms to maintain a constant internal environment is known as A.diuresisB.endosmosisC.plasmolysisD.homeostasis Objective Show full explanation
Question 4The bicuspid valve is located between the A.left auricle and left ventricleB.aorta and the left ventricleC.superior vena cava and the inferior vena cavaD.right auricle and right ventricle. Objective Show full explanation
Question 5The pulmonary artery carries A.oxygenated blood from the right ventricle to the lungsB.deoxygenated blood from the left ventricle to the right auricleC.deoxygenated blood from the right ventricle to the lungsD.oxygenated blood from the lungs to the right auricle. Objective Show full explanation
Question 6Which of the following organs is responsible for controlling the body temperature regulation and water balance in mammals? A.KidneyB.HypothalamusC.ParathyroidD.Adrenal Objective Show full explanation
Question 7Deamination is the process during which A.excess amino acids is broken down into ammonia and a keto-acidB.fats and oils are converted into an emulsion for absorptionC.excess amino acid is converted into proteinsD.excess glucose is converted and stored as glycogen in the liver. Objective Show full explanation
Question 8Which of the following is not classified as a terrestrial habitat? A.ForestB.Guinea SavannahC.DesertD.Littoral Zone. Objective Show full explanation
Question 9The relationship between a herbivore and the bacteria which live in its caecum is known as A.parasitismB.symbiosisC.CommensalismD.saprophytism. Objective Show full explanation
Question 10During blood transfusion, agglutination may occur as a result of the reaction between : A.similar antigens and antibodiesB.contrasting antigens and antibodiesC.two different antigensD.two different antibodies Objective Show full explanation
Question 11The brain and the spinal cord make up the A.automatic nervous systemB.sympathetic nervous systemC.central nervous systemD.parasympathetic nervous system Objective Show full explanation
Question 12Auxins are produced in the A.petiole of leavesB.apical regions of roots and shootsC.epidermis of roots and shootsD.parenchyma of roots and shoots. Objective Show full explanation
Question 13The pituitary gland is called the master gland because A.it is located in the brainB.its secretions are more numerous than those of any other glandC.its secretions controls other glandsD.it regulates muscular movements. Objective Show full explanation
Question 14The pigment in the malpighian layer responsible for skin colouration is known as A.haemoglobinB.melaninC.haemocyaninD.haemoerythrin Objective Show full explanation
Question 15Which of the following is not an evidence of evolution? A.FossilB.AnatomyC.EmbryologyD.Behaviour. Objective Show full explanation
Question 16Which of the following is not true about gene mutation? it A.introduces new traits into a populationB.cause changes in the DNAC.always affects the chromosome numberD.is a source of new genes Objective Show full explanation
Question 17Species can be defined as the group of organisms that A.resemble each other and live in the same habitatB.are of a common origin and are always found togetherC.resemble each other and can interbreed freelyD.resemble each other and occupy the same niche.Objective Show full explanation
Question 18The change in colour of the chameleon serves as a means of A.attraction to the opposite sexB.repulsion of the enemyC.a camouflage from a predatorD.production of a variety of skinObjective Show full explanation
Question 19Increasing specialization of structure and function among animals of the same class or order for survival in new and different environments is called A.adaptive radiationB.homologyC.phylogenyD.ontogenyObjective Show full explanation
Question 20The haploid number of chromosomes in man is A.48B.46C.24D.23 Objective Show full explanation