Datasets:
year int64 2.02k 2.02k | subject stringclasses 1
value | topic stringclasses 9
values | difficulty int64 1 3 | question_number int64 1 9 | question_text stringclasses 9
values | options dict | correct_answer stringclasses 4
values | explanation stringclasses 9
values |
|---|---|---|---|---|---|---|---|---|
2,017 | Biology | Biological Research & Institutions | 2 | 1 | Which one of the following Ethiopian biological research institutes is known for housing a major gene bank in Africa? | {
"A": "Addis Ababa University Biology Department",
"B": "Institute of Biodiversity Conservation",
"C": "Aklilu Lemma Institute of Pathobiology",
"D": "Armauer Hansen Research Institute"
} | B | The Ethiopian Biodiversity Institute (formerly known as the Institute of Biodiversity Conservation) houses one of the largest and oldest seed/gene banks in Africa. |
2,017 | Biology | Microscopy | 1 | 2 | A grade 12 student marked two dots close to each other using a pen on a piece of paper and observed them under a microscope. The two dots appeared well separated under the microscope. This was due to | {
"A": "resolution",
"B": "magnification",
"C": "staining",
"D": "mounting"
} | A | Resolution is the ability of a microscope to distinguish two close objects as separate entities. |
2,017 | Biology | Cell Biology | 1 | 3 | From the following alternatives select the common features that are found both in animal and plant cells. | {
"A": "Cell membrane, nucleus, cytoplasm, lysosome and Golgi apparatus",
"B": "Cell membrane, nucleus, cytoplasm, mitochondria and endoplasmic reticulum",
"C": "Cell membrane, nucleus, cytoplasm, chloroplast and Golgi apparatus",
"D": "Cell membrane, nucleus, cytoplasm, large vacuole and Golgi apparatus"
} | B | Both plant and animal cells share fundamental eukaryotic organelles: cell membrane, nucleus, cytoplasm, mitochondria, and ER. |
2,017 | Biology | Cell Transport & Osmosis | 3 | 4 | A biology teacher grouped his students into two groups and ordered group I to place a slice of potato in hypertonic solution and group II in hypotonic solution. What will happen to the potato slice in group I and group II? | {
"A": "turgid while for group II it will be flaccid.",
"B": "haemolyzed while for group II it will be flaccid.",
"C": "flaccid while for group II it will be turgid.",
"D": "turgid while for group II there will be no change."
} | C | In a hypertonic solution (Group I), water leaves the cells (flaccid). In a hypotonic solution (Group II), water enters (turgid). |
2,017 | Biology | Nutrition & Diet | 2 | 5 | A man eats only vegetables, beans, banana and orange for one week continuously in his lunch and dinner. For this man, what nutrients are most likely missed in his meal to be a balanced diet? | {
"A": "Carbohydrates",
"B": "Lipids",
"C": "Proteins",
"D": "Minerals"
} | B | A diet strictly of vegetables and beans without oils or animal products is often very low in essential lipids. |
2,017 | Biology | Human Digestive System | 2 | 6 | Which of the following is correct about the process of digestion or absorption of food in the small intestine? | {
"A": "Proteins are converted into amino acids by the action of hydrochloric acid and amylase.",
"B": "Bile emulsifies fats to increase the surface area to make it easier for lipase.",
"C": "Water is reabsorbed into the small intestine and metabolic wastes are excreted.",
"D": "Glucose and non-hydrolyzed starc... | B | Bile emulsifies large fat droplets, increasing surface area for chemical digestion by lipase. |
2,017 | Biology | Enzymes & Digestion | 2 | 7 | In an experiment, students wanted to prove that enzymatic digestion begins in the mouth using certain chewed food coated with their own saliva. In order to get a positive result for their experiment, what type of food sample and testing solution should the students use? | {
"A": "Potato and iodine solution",
"B": "Meat and Benedict's solution",
"C": "Fish and sodium hydroxide solution",
"D": "Bread and copper sulphate solution"
} | A | Salivary amylase breaks down starch. Testing potato with iodine shows the presence/disappearance of starch. |
2,017 | Biology | Respiratory System | 3 | 8 | Compared to the inhaled air, what are the percentage of nitrogen, oxygen and carbon dioxide gases in exhaled air, respectively? | {
"A": "80%, 16% and 4%",
"B": "80%, 4% and 16%",
"C": "16%, 4% and 80%",
"D": "4%, 16% and 80%"
} | A | Nitrogen stays at ~80%, Oxygen drops to ~16%, and CO2 increases to ~4%. |
2,017 | Biology | Respiration Experiments | 3 | 9 | Three students carried out different experiments in exhaled air. Student I uses cold glass and blue cobalt chloride paper. Student II uses ice cubes. Student III uses tube containing lime solution and straw. Which student plans to demonstrate the presence of water vapour and carbon dioxide, respectively? | {
"A": "II and III",
"B": "I and II",
"C": "II and I",
"D": "I and III"
} | D | Cobalt chloride paper tests for water; lime water turns milky in the presence of CO2. |
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