POST UTME BABCOCK UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 2.5 L flask contains 0.5 mol of an ideal gas at 25°C. If 1.0 mol of the gas is added to the flask, what is the new pressure of the gas?
A. 2.5 atm
B. 3.0 atm
C. 4.0 atm
D. 5.0 atm
Question 2
The structure that connects the phloem and xylem tissues in a plant is called?
A. Cortex
B. Endodermis
C. Pericycle
D. Phloem-Xylem Bundle
Question 3
A plant is placed in a solution containing 0.1 M KNO3. The plant's roots are permeable to K+ ions. What is the expected concentration of K+ ions in the plant's xylem after 1 hour?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 4
A plant grows in a controlled environment with a cons\tant temperature of 25°C and a photoperiod of 12 hours. If the plant is grown for 30 days, what is the expected growth rate?
A. 0.5 cm/day
B. 1.0 cm/day
C. 1.5 cm/day
D. 2.0 cm/day
Question 5
A diagram of a human brain is shown below. What is the primary function of the cerebral cortex in this brain?
A. To regulate the body's autonomic functions
B. To process sensory information and control movement
C. To store and retrieve memories
D. To regulate the body's emotional responses
Question 6
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the
A. Spindle fibers
B. Centrioles
C. Nuclear envelope
D. Mitotic spindle
Question 7
In a tropical rainforest, the energy flow from producers to primary consumers is typically described by which of the following trophic levels?
A. Producers > Primary Consumers > Secondary Consumers
B. Producers > Primary Consumers > Tertiary Consumers
C. Producers > Herbivores > Carnivores
D. Producers > Decomposers > Detritivores
Question 8
The process of photosynthesis in plants involves the conversion of light energy into chemical energy, which is stored in the form of
A. ATP and NADPH
B. Glu\cose and oxygen
C. Water and carbon dioxide
D. Starch and sucrose
Question 9
A 50 mL sample of a solution containing 0.1 M NaCl is added to a 100 mL sample of a solution containing 0.2 M NaOH. What is the resulting pH?
A. 8.0
B. 9.0
C. 10.0
D. 11.0
Question 10
A cell is placed in a solution containing 0.1 M glu\cose. The cell membrane is permeable to glu\cose. What is the expected concentration of glu\cose inside the cell after 1 hour?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 11
A diagram of the human \endocrine system is shown below. Which of the following structures is responsible for the production of insulin?
A. A
B. B
C. C
D. D
Question 12
A diagram of a human eye is shown below. What is the primary function of the retina in this eye?
A. To focus light onto the lens
B. To detect light and transmit signals to the brain
C. To regulate the amount of light entering the eye
D. To provide structural support to the eye
Question 13
The process by which the body regulates the amount of water in the blood is called?
A. Osmosis
B. Diffusion
C. Active Transport
D. Hormonal Regulation
Question 14
In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?
A. 0.36
B. 0.64
C. 0.48
D. 0.52
Question 15
A diagram of the human circulatory system is shown below. Which of the following structures is responsible for the regulation of blood pressure?
A. A
B. B
C. C
D. D

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