Biology, 1978, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

1978

Title :

Biology

Exam :

JAMB Exam

Paper 1 | Objectives

31 - 40 of 50 Questions

#	Question	Ans
31.	The mammalian stomach can carry out a number of processes except A. absorption of glucose B. secretion of hydrochloric acid C. secretion gastric juice D. churning of food E. production of trypsin Show Content Detailed Solution Trypsin is a serine protease from the PA clan superfamily, found in the digestive system of many vertebrates, where it hydrolyzes proteins. Trypsin is formed in the small intestine	E
32.	A spirogyra cell placed was placed in solution X after 1 minute the cell has been plasmolysed, solution X was A. Tap water B. a very strong sugar solution C. a weak sugar solution D. a very weak salt solution E. distilled water Show Content Detailed Solution When a plant cell is put in highly concentrated solution, it increases the pressure on the cell. Hence, plasmolysis holds in a highly concentrated solution.	B
33.	A farmer X working in a swamp did not eat any food nor drink any water. Which of this diseases can he not contact A. Cholera B. Bilharzia C. River blindness D. Malaria E. Sleeping sickness Show Content Detailed Solution Cholera is a water-borne disease hence, it cannot be contacted by the farmer.	A
34.	A carbohydrate molecule in the blood in the right ventricles of the heart is pumped into the cell of the toe of a man. Which of these structure is it unlikely to pass through en-route A. pulmonary artery B. lungs C. Heart D. liver E. aorta Show Content Detailed Solution Blood circulation holds in the circulatory system, the liver is a part of the digestive system. Hence, the liver can't be a part of the circulation process.	D
35.	In a photo-tropic experiment, young seedlings in a box were subjected to light from one direction. The seedling continue to grow erect. Which of the following statement is correct A. Only the tip of the seedling received the light B. The light was not strong enough C. The seedlings were rather too young D. The tip of the seedling may have been covered E. The box containing the seedling should have been placed on a laboratory bench Show Content Detailed Solution Plants growing with an unshaded light source will grow straight up towards the sun because auxin is evenly distributed all around the shoot. Plants are able to “see” light using the tips of the plant shoots.	A
36.	Which of these is not a characteristics of a wind pollinated flowers? A. A smaller quantities of sticky pollen produce B. Feathery styles of stigmas pendulously hang outrside the flower C. small inconspicuous scentless flower D. large anthers which are loosley attached to the filament E. Light pollen grains produced in large quantities from the anthers Show Content Detailed Solution Wind-pollinated grains are non-sticky and light, to ensure they can be blown by the wind.	A
37.	A germinating seed requires oxygen which is essential for A. converting carbonhydrate into glucose B. Transporting energy from part of the plant to another C. The production of energy by oxidising essential carbonhydrate D. hydrolysis of protein E. The formation of water molecules within the germinating seed Show Content Detailed Solution Oxygen is needed by plants in order to produce carbondioxide which is useful by the plant.	C
38.	Which of these products obtained from analyzing sweat from skin is not an excretory product? A. water B. Salts C. Dust D. Urea E. Urates Show Content Detailed Solution Dust is not an excretory product from the human.	C
39.	In a breeding program a cross was made between two true breeding cow-pea types: one with round seeds and the other with wrinkled seed. If roundness is dominant why wrinkleness is recessive, in the first filial generation all the seeds produced will be A. 25% wrinkled, 75% round B. 100% wrinkled C. 50% wrinkled, 50% round D. 75% wrinkled, 25% round E. 100% round Show Content Detailed Solution Owing to the dominance of roundness, the crossing of the two seeds regularly would see all the offsprings having mixed genes but will be round.	E
40.	During reproduction of the organism in figure above(ameoba) the first structure to divide is? A. 1 B. 2 C. 3 D. 4 E. 5 Show Content Detailed Solution The part labeled 3 is the Nucleus which is the first to divide by BINARY FISSION.	C

31.	The mammalian stomach can carry out a number of processes except A. absorption of glucose B. secretion of hydrochloric acid C. secretion gastric juice D. churning of food E. production of trypsin Show Content Detailed Solution Trypsin is a serine protease from the PA clan superfamily, found in the digestive system of many vertebrates, where it hydrolyzes proteins. Trypsin is formed in the small intestine	E
32.	A spirogyra cell placed was placed in solution X after 1 minute the cell has been plasmolysed, solution X was A. Tap water B. a very strong sugar solution C. a weak sugar solution D. a very weak salt solution E. distilled water Show Content Detailed Solution When a plant cell is put in highly concentrated solution, it increases the pressure on the cell. Hence, plasmolysis holds in a highly concentrated solution.	B
33.	A farmer X working in a swamp did not eat any food nor drink any water. Which of this diseases can he not contact A. Cholera B. Bilharzia C. River blindness D. Malaria E. Sleeping sickness Show Content Detailed Solution Cholera is a water-borne disease hence, it cannot be contacted by the farmer.	A
34.	A carbohydrate molecule in the blood in the right ventricles of the heart is pumped into the cell of the toe of a man. Which of these structure is it unlikely to pass through en-route A. pulmonary artery B. lungs C. Heart D. liver E. aorta Show Content Detailed Solution Blood circulation holds in the circulatory system, the liver is a part of the digestive system. Hence, the liver can't be a part of the circulation process.	D
35.	In a photo-tropic experiment, young seedlings in a box were subjected to light from one direction. The seedling continue to grow erect. Which of the following statement is correct A. Only the tip of the seedling received the light B. The light was not strong enough C. The seedlings were rather too young D. The tip of the seedling may have been covered E. The box containing the seedling should have been placed on a laboratory bench Show Content Detailed Solution Plants growing with an unshaded light source will grow straight up towards the sun because auxin is evenly distributed all around the shoot. Plants are able to “see” light using the tips of the plant shoots.	A

36.	Which of these is not a characteristics of a wind pollinated flowers? A. A smaller quantities of sticky pollen produce B. Feathery styles of stigmas pendulously hang outrside the flower C. small inconspicuous scentless flower D. large anthers which are loosley attached to the filament E. Light pollen grains produced in large quantities from the anthers Show Content Detailed Solution Wind-pollinated grains are non-sticky and light, to ensure they can be blown by the wind.	A
37.	A germinating seed requires oxygen which is essential for A. converting carbonhydrate into glucose B. Transporting energy from part of the plant to another C. The production of energy by oxidising essential carbonhydrate D. hydrolysis of protein E. The formation of water molecules within the germinating seed Show Content Detailed Solution Oxygen is needed by plants in order to produce carbondioxide which is useful by the plant.	C
38.	Which of these products obtained from analyzing sweat from skin is not an excretory product? A. water B. Salts C. Dust D. Urea E. Urates Show Content Detailed Solution Dust is not an excretory product from the human.	C
39.	In a breeding program a cross was made between two true breeding cow-pea types: one with round seeds and the other with wrinkled seed. If roundness is dominant why wrinkleness is recessive, in the first filial generation all the seeds produced will be A. 25% wrinkled, 75% round B. 100% wrinkled C. 50% wrinkled, 50% round D. 75% wrinkled, 25% round E. 100% round Show Content Detailed Solution Owing to the dominance of roundness, the crossing of the two seeds regularly would see all the offsprings having mixed genes but will be round.	E
40.	During reproduction of the organism in figure above(ameoba) the first structure to divide is? A. 1 B. 2 C. 3 D. 4 E. 5 Show Content Detailed Solution The part labeled 3 is the Nucleus which is the first to divide by BINARY FISSION.	C