POST UTME COVENANT UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a population of 1000 bacteria, 80% are resis\tant to a particular antibiotic. If 200 bacteria are randomly selected for treatment, what is the probability that at least 150 will be resis\tant to the antibiotic?
A. 0.25
B. 0.30
C. 0.35
D. 0.40
Question 2
A plant cell has a cell wall, a large central vacuole, and a small nucleus. Which of the following organelles is NOT found in plant cells?
A. lysosome
B. vacuole
C. nucleus
D. mitochondrion
Question 3
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.5
B. 0.25
C. 0.75
D. 0.33
Question 4
A 50-year-old woman has a 5-year history of hypertension. Her blood pressure is 160/100 mmHg. Which of the following is the most likely cause of her hypertension?
A. renal artery stenosis
B. pheochromocytoma
C. primary aldosteronism
D. essential hypertension
Question 5
A diagram of a human kidney is shown below. Which of the following statements is true about the function of the nephrons in this kidney?
A. The nephrons filter waste products, such as urea and other nitrogenous compounds, from the blood.
B. The nephrons regulate the concentration of electrolytes, such as sodium and potassium, in the blood.
C. The nephrons produce hormones, such as erythropoietin and renin, that help regulate blood pressure.
D. The nephrons produce urine, which is excreted from the body through the ureters.
Question 6
The process by which plants convert light energy into chemical energy is called?
A. Respiration.
B. Photosynthesis.
C. Transpiration.
D. Osmosis.
Question 7
A 50-year-old man has a history of hypertension and is taking a \beta-blocker medication. Which of the following is a potential side effect of this medication?
A. Bradycardia
B. Hypertension
C. Diabetes
D. Asthma
Question 8
A diagram of the human reproductive system is shown below. Which part of the female reproductive system is responsible for producing eggs?
A. Ovary
B. Fallopian Tube
C. Uterus
D. Vagina
Question 9
A 2.5 L flask contains 0.5 M glu\cose solution. If 10 mL of 1 M HCl is added to the solution, what is the new concentration of glu\cose?
A. 0.49 M
B. 0.51 M
C. 0.49 M
D. 0.51 M
Question 10
A patient has a bacterial infection caused by Staphylococcus aureus. Which of the following antibiotics is most effective against this bacterium?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
D. Vancomycin
Question 11
A diagram of a human digestive system is shown below. Which of the following statements is true about the function of the pancreas in this system?
A. The pancreas produces digestive enzymes, such as amylase and lipase, that break down carbohydrates and fats.
B. The pancreas produces hormones, such as insulin and glucagon, that help regulate blood sugar levels.
C. The pancreas produces bile, which is stored in the gallbladder and released into the small intestine to aid in fat digestion.
D. The pancreas produces mucus, which helps protect the digestive tract from acid and enzymes.
Question 12
The classification of living things into kingdoms is based on the following characteristics. Which of the following is a characteristic of the kingdom Animalia?
A. They are multicellular and eukaryotic.
B. They are unicellular and prokaryotic.
C. They are multicellular and eukaryotic, and have a nervous system.
D. They are unicellular and eukaryotic.
Question 13
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 14
A 35-year-old patient presents with symptoms of fatigue, weakness, and shortness of breath. Laboratory tests reveal a low hemoglobin level of 8 g/dL. Which of the following organs is primarily responsible for the production of hemoglobin?
A. Liver
B. Spleen
C. Bone Marrow
D. Kidneys
Question 15
A population of rabbits is growing at a rate of 20% per year. If the population is currently 1000, what will be the population after 5 years?
A. 1638
B. 2000
C. 2430
D. 3000

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