POST UTME CHRISTOPHER UNIVERSITY 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In the human body, what is the primary function of the xylem tissue in plants?
A. Transport of water and minerals
B. Production of glu\cose through photosynthesis
C. Storage of nutrients and water
D. Regulation of body temperature
Question 2
A 10 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 1.0 m/s
B. 2.0 m/s
C. 3.0 m/s
D. 4.0 m/s
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. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 4
A diagram of the human digestive system is shown below. What is the function of the pancreas?
A. Production of bile to aid in fat digestion
B. Production of digestive enzymes to aid in protein digestion
C. Production of hormones to regulate blood sugar levels
D. Production of mucus to aid in the movement of food through the digestive system
Question 5
A population of bacteria grows according to the equation N(t) = 1000e^(0.2t), where N(t) is the population size at time t. If the population size is 2000 at time t = 5, what is the growth rate?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 6
A 1.0 M solution of NaOH is mixed with a 2.0 M solution of HCl. What is the resulting pH?
A. 1.0
B. 2.0
C. 3.0
D. 4.0
Question 7
A geneticist is studying the inheri\tance of a trait in a population of mice. The trait is controlled by a \single gene with two alleles: A and a. The geneticist finds that the frequency of the A allele is 0.6 and the frequency of the a allele is 0.4. What is the expected genotype and phenotype of the offspring of two heterozygous parents?
A. Genotype: Aa, Phenotype: A
B. Genotype: Aa, Phenotype: a
C. Genotype: AA, Phenotype: A
D. Genotype: aa, Phenotype: a
Question 8
A 50-g sample of a subs\tance is dissolved in 100 mL of water. What is the molarity of the resulting solution?
A. 0.05 M
B. 0.1 M
C. 0.5 M
D. 1.0 M
Question 9
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is permeable to sucrose, what is the concentration of sucrose in the cytosol after 30 minutes?
A. 0.3 M
B. 0.4 M
C. 0.5 M
D. 0.6 M
Question 10
A diagram of the human eye is shown below. What is the function of the lens?
A. B\ending light to focus on the retina
B. Regulating the amount of light entering the eye
C. Producing tears
D. Absorbing excess light
Question 11
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. If 1.0 mol of the gas is removed, what is the new pressure?
A. 1.5 atm
B. 2.0 atm
C. 2.5 atm
D. 3.0 atm
Question 12
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'BB'?
A. 0.36
B. 0.64
C. 0.68
D. 0.72
Question 13
In the context of asexual reproduction, what is the primary advantage of budding in yeast?
A. Increased genetic diversity
B. Efficient use of resources
C. Rapid reproduction
D. Improved survival rates
Question 14
A diagram of the xylem and phloem tissues in a plant stem is shown below. What is the function of the xylem tissue?
A. Transport of water and minerals
B. Transport of sugars and amino acids
C. Support and storage
D. Protection from pathogens
Question 15
In a population of 1000 individuals, the frequency of the dominant allele (A) is 0.6, and the frequency of the recessive allele (a) is 0.4. What is the expected frequency of the genotype AA in the next generation?
A. 0.36
B. 0.42
C. 0.48
D. 0.54

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