JAMB Biology Questions and Answers 2023 [Numbers 1 – 10]
1. The difference between the cell wall of a plant cell and animal cell is that A. plant cell wall contains silica B. animal cell contains stomata in its membrane C. plant cell is made up of membranes only D. plant cell wall contains cellulose 2. In mammals, digestion of starch starts in the A. stomach B. small intestine C. mouth D. liver 3. In the process of pollination of a flowering plant, the pollen grain must touch this structure to start off. A. petals B. calyx C. ovary D. stigma 4. All birds have A. two-chambered heart B. three-chambered heart C. four-chambered heart D. one-chambered heart 5. The list of important types of supporting tissues in plant does not include A. collenchyma B. cambium C. sclerenchyma D. xylem 6. Bones of birds are modified for flight by A. being long B. being cartilaginous C. containing air spaces D. being filled with marrow 7. The waste product of plant like glycosides, tannins, alkaloids and plant oils may be stored in the A. xylem B. cell vacuoles and cell wall of leaves C. roots, stem tissues and bark D. pith, stomata and root hairs 8. The part of the alimentary system of bird where grinding of maize occurs is A. crop B. gizzard C. cloak D. rectum 9. To study the structure of mammalian kidney in a secondary school you need A. to get fresh kidney of a sheep or a pig B. to get a fresh kidney of a man C. to get a fresh kidney of a chick D. to get a fresh kidney of a toad 10. The following are some examples of food chain in the savanna terrestrial ecosystem except
A. grass→zebra→lion B. diatoms→crayfish→bony fish C. seeds→weaverbird→civets D. leaves→elephant→vulture
Answers to Biology Question Number 1 – 10 1.D 2.C 3.D 4.C 5.C 6.C 7.B 8.B 9.A 10.B
JAMB Biology Questions and Answers 2023 [Numbers 11 – 20]
11. The mitochondrion consists of A. chemicals that break up complex compounds in the cells into simpler compounds B. rich store of ribonucleic acid C. digestive enzymes and hormones D. protein phosphorus and fats 12. In amoeba, the ectoplasm is bounded by a thin membrane known as the A. plasmasol B. plasmagel C. plasmalemma D. protoplasm 13. Centipedes are A. equally dangerous as millipedes B. less dangerous than millipedes C. more dangerous than all D. not dangerous at all 14. Odontophore is a skeletal structure in the phylum of A. pisces B. echinoderms C. mollusca D. amphibians 15. Wattle is a name of a structure found in A. lizard B. chameleon C. cock D. dogfish 16. One of these is not a feature of the caudal vertebrae in mammal A. they possess neural canal B. their transverse process are poorly developed C. their neural spines are gradually lost D. there are not many articular surfaces 17. The inner ear has two types of coiled structure called cochlea which A. receives sound impulses B. has sensory cell which carry impulses to the spinal cord C. connects to the eusta chain tube D. possess cells sensitive to balance 18. The viruses are the smallest known organisms and are divided into two parts; the outer part and the inner part. The outer part is protein and the inner part is A. nucleus B. vacuole C. particle D. DNA and RNA 19. The thallus of a lichen consists of A. a virus and a fungus
B. algae cells and fungal hyphae C. bacterial and fungal cells D. soredium and basisiopot 20. The palisade parenchyma is found in the A. steam B. leaf C. flower D. root
Answers to Biology Question Number 11 – 20 11.A 12.C 13.C 14.C 15.C 16.A 17.A 18.D 19.B 20.B
JAMB Biology Questions and Answers 2023 [Numbers 21 – 30]
21. Increasing complexity due to multicellularity first appeared in this animal group A. protozoa B. coelentrata C. sarcodina D. protista 22. In the angiosperms, the sieve tube members are living non-nucleated, but they are usually accompanied by A. cork cambium B. phloem rays C. vascular cambium D. companion cells 23. Abscisic acid is a chemical that prepares plants for A. ripening fruits B. emergence of seedlings C. for leaf fall D. reproduction 24. The formula below represents C6H12O6 → 2C2H6O + 2CO2 + ATP A. glycolysis B. fermentation C. photosynthesis D. respiration 25. In any population, any specific allele will mutate at one time or another, usually to a non functional or harmful form. The proportion of gametes carrying new mutant alleles of a given locus is called A. the mutation rate B. the selection coefficient C. the relative fitness D. the lethal genotype 26. In mosses, the sporophyte generation is highly prominent producing spores in a cone-like A. gametophyte B. strobilus C. Antheridium D. archegonium 27. When Sudan 111 solution is boiled with a solution of food substances, it gives a colour black precipitate showing the presence of A. fats and oil B. protein C. amino acid D. starch
28. Plants adapted to life in salty marsh are known as A. hydrophytes B. xerophytes C. halophytes D. epiphytes 29. A circulatory system that does not allow mixing of oxygenated blood in the mammalian heart is referred to as A. open B. double C. single D. closed 30. In a pyramid of numbers, it is common to have …… with the smallest of individuals A. secondary consumers B. tertiary consumers C. primary consumers D. primary producers
Answers to Biology Question Number 21 – 30 21.B 22.D 23.C 24.B 25.A 26.D 27.A 28.C 29.B 30.B
JAMB Biology Questions and Answers 2023 [Numbers 31 – 40] 31. From the following list of types of mutation, identify the one that is hereditary A. genetic mutation B. somatic mutation C. germinal mutation D. gametic mutation 32. Which of these would not be a limiting factor in photosynthesis? A. O2 B. CO2 C. chlorophyll D. light 33. In a cell digestive enzymes mostly occur in A. ribosome B. lysosome C. mitochondria D. plastids 34. Which of these is not a lipid? A. wax B. sterol C. glycerol D. lecithin 35. Phototropism is A. a unilateral response to light B. a bilateral response to light C. both unilateral and bilateral response to light D. a hormonal gradient created within the organ 36. The site of protein synthesis in a cell is A. golgi apparatus B. ribosomes C. lysosomes D. nucleus 37. On storage, the sweetness of corn is lost. This is because A. polysaccharide is reconverted into soluble sugar B. concentration of sugar increases due to storage C. of conversion of sugar to polysaccharide D. enzymes responsible for the conversion are lost
38. The eye worm is known as A. Wuchereiria bancrofti B. Brugia malayi C. Loa loa D. Dracunenlus medinensis 39. Which of these plants is not a pitcher plant? A. nepenthes B. crotalaria C. sarracenia D. dionaea 40. One of these arthropod is a carrier of viruses and other micro organism A. termite B. ant C. bee D. flea
Answers to Biology Question Number 31 – 40 31.C 32.A 33.B 34.C 35.A 36.B 37.C 38.C 39.B 40.D
