Year :
1984
Title :
Biology
Exam :
JAMB Exam
Paper 1 | Objectives
11 - 20 of 50 Questions
| # | Question | Ans |
|---|---|---|
| 11. |
Osmosis can be defined as the movement of A. Molecules from solution of higher concentration to low concentration B. Molecules from solution of low concentration to high concentration C. Water from solution of high concentration to low concentration D. Water across a semi-permeable membrane from solution of low concentration to high concentration E. Water across a semi-permeable membrane from solution of high concentration to low concentration Detailed SolutionOsmosis is a special case of diffusion in which only water molecules move from a region of higher to lower water potential through a semi-permeable membrane. |
|
| 12. |
Which of the following statement is NOT true of enzymes? They A. Are proteins B. Need cofactors to activate them C. Are sensitive in their action D. Are specific in their action E. Can withstand high temperature |
E |
| 13. |
The dorsal and anal fins of fish are used for A. Upward movement B. Controlling rolling C. Downward movement D. Steering E. Buoyancy |
B |
| 14. |
Exoskeleton is NOT found in the A. Maggot B. Mosquito larva C. Earth worm D. Caterpillar E. Termite |
C |
| 15. |
Blood clotting is initiated by A. Leucocytes B. Platelets C. Haemolymph D. Haemoglobin E. Erythrocytes |
B |
| 16. |
Pepsin is a digestive enzymes which breaks A. Cellulose into glucose molecules B. Carbohydrates into simple sugars C. Protein into peptones D. Fats into glycerol and fatty acid E. Sucrose into glucose and fructose |
C |
| 17. |
Anaerobic respiration in yeast produces A. Carbondioxide and ethanol B. Carbondioxide and water C. Carbondioxide and oxygen D. Carbondioxide and glucose E. Ethanol and water |
A |
| 18. |
Underground stems which grow horizontally through the soil are A. Bulbs B. Rhizomes C. Runners D. Corms E. Stolons |
B |
| 19. |
A man with normal haemoglobin (AA) marries a woman who has sickle-cell haemoglobin (SS). They have a child who has a sickle-cell trait. Which of the following genotypes could be associated with the child’s haemoglobin? A. AA B. OO C. AO D. AS E. SS |
D |
| 20. |
In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results? A. Mercurous nitrates B. Copper sulphate C. Mercuric nitrate D. Sodium carbonate E. Ammonium hydroxide |
B |
| 11. |
Osmosis can be defined as the movement of A. Molecules from solution of higher concentration to low concentration B. Molecules from solution of low concentration to high concentration C. Water from solution of high concentration to low concentration D. Water across a semi-permeable membrane from solution of low concentration to high concentration E. Water across a semi-permeable membrane from solution of high concentration to low concentration Detailed SolutionOsmosis is a special case of diffusion in which only water molecules move from a region of higher to lower water potential through a semi-permeable membrane. |
|
| 12. |
Which of the following statement is NOT true of enzymes? They A. Are proteins B. Need cofactors to activate them C. Are sensitive in their action D. Are specific in their action E. Can withstand high temperature |
E |
| 13. |
The dorsal and anal fins of fish are used for A. Upward movement B. Controlling rolling C. Downward movement D. Steering E. Buoyancy |
B |
| 14. |
Exoskeleton is NOT found in the A. Maggot B. Mosquito larva C. Earth worm D. Caterpillar E. Termite |
C |
| 15. |
Blood clotting is initiated by A. Leucocytes B. Platelets C. Haemolymph D. Haemoglobin E. Erythrocytes |
B |
| 16. |
Pepsin is a digestive enzymes which breaks A. Cellulose into glucose molecules B. Carbohydrates into simple sugars C. Protein into peptones D. Fats into glycerol and fatty acid E. Sucrose into glucose and fructose |
C |
| 17. |
Anaerobic respiration in yeast produces A. Carbondioxide and ethanol B. Carbondioxide and water C. Carbondioxide and oxygen D. Carbondioxide and glucose E. Ethanol and water |
A |
| 18. |
Underground stems which grow horizontally through the soil are A. Bulbs B. Rhizomes C. Runners D. Corms E. Stolons |
B |
| 19. |
A man with normal haemoglobin (AA) marries a woman who has sickle-cell haemoglobin (SS). They have a child who has a sickle-cell trait. Which of the following genotypes could be associated with the child’s haemoglobin? A. AA B. OO C. AO D. AS E. SS |
D |
| 20. |
In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results? A. Mercurous nitrates B. Copper sulphate C. Mercuric nitrate D. Sodium carbonate E. Ammonium hydroxide |
B |