POST UTME AAUA 2023 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of photosynthesis in plants involves the conversion of light energy into chemical energy, resulting in the production of glu\cose and oxygen. Which of the following is a byproduct of photosynthesis?
A. Glu\cose and oxygen
B. Glu\cose and carbon dioxide
C. Oxygen and water
D. Glu\cose and nitrogen
Question 2
A plant has a genotype of 'Rr' for the flower color gene. What is the probability that the plant will produce a seed with the genotype 'RR'?
A. 0.25
B. 0.5
C. 0.75
D. 1.0
Question 3
A plant has a genotype of 'Rr' for the flower color gene. What is the probability that the plant will produce a seed with the genotype 'rr'?
A. 0.25
B. 0.5
C. 0.75
D. 1.0
Question 4
A researcher is studying the effect of temperature on the growth of a microorganism. The researcher measures the growth rate of the microorganism at different temperatures and plots the data on a graph. Which of the following types of graphs would best represent the data?
A. Line graph
B. Bar graph
C. Scatter plot
D. Histogram
Question 5
A 2.5 L solution of 0.15 M NaCl is diluted to 5 L. What is the new concentration of NaCl?
A. 0.075 M
B. 0.15 M
C. 0.3 M
D. 0.45 M
Question 6
A patient has a blood glu\cose level of 120 mg/dL. If the patient takes 10 units of insulin, what is the new blood glu\cose level?
A. 80 mg/dL
B. 100 mg/dL
C. 120 mg/dL
D. 140 mg/dL
Question 7
A patient has a blood pressure of 120/80 mmHg. If the patient takes a medication that lowers the systolic blood pressure by 10 mmHg, what is the new blood pressure?
A. 110/80 mmHg
B. 120/90 mmHg
C. 130/80 mmHg
D. 140/90 mmHg
Question 8
A nerve impulse travels from the d\endrite to the axon hillock. What is the direction of the impulse?
A. From d\endrite to axon hillock
B. From axon hillock to d\endrite
C. In a circular motion
D. In a zigzag motion
Question 9
The diagram below shows a simple circuit. Which of the following components is responsible for the flow of electrons?
A. Battery
B. Resistor
C. Wire
D. Switch
Question 10
The process by which plants convert light energy into chemical energy is known as?
A. Photosynthesis
B. Respiration
C. Transpiration
D. Osmosis
Question 11
The human body has a complex system of reproduction that involves the production of sex cells and the fertilization of an egg by a sperm. Which of the following is a characteristic of a sperm cell?
A. It has a large nucleus
B. It has a long tail
C. It has a small head
D. It has a large flagellum
Question 12
What is the primary function of the xylem in plants?
A. Transport of sugars
B. Transport of water and minerals
C. Storage of nutrients
D. Synthesis of proteins
Question 13
A plant has a genotype of 'RR' and is crossed with a plant having the genotype 'rr'. What is the probability that the offspring will have the genotype 'Rr'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 14
The genetic principle that states that the characteristics of an organism are determined by the interaction of two or more genes is known as?
A. Incomplete dominance
B. Codominance
C. Epistasis
D. Polygenic inheri\tance
Question 15
In a typical terrestrial e\cosystem, what is the primary mechanism by which plants convert light energy into chemical energy?
A. Respiration
B. Photosynthesis
C. Decomposition
D. Fermentation

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