POST UTME NILE UNIVERSITY 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A species of bird has a wing span of 1.5 meters. If the bird is flying at a speed of 50 km/h, what is the power output of the bird?
A. 100 W
B. 200 W
C. 500 W
D. 1000 W
Question 2
The diagram below shows a simple harmonic motion. What is the amplitude of the motion?
A. 2 cm
B. 4 cm
C. 6 cm
D. 8 cm
Question 3
A genetic trait is determined by a \single gene with two alleles, one dominant and one recessive. If an individual has the genotype
A. AA or Aa
B. aa
C. Aa or aa
D. AA or aa
Question 4
A diagram of a cell membrane is shown below. Which of the following is a characteristic of the cell membrane?
A. selectively permeable
B. impermeable
C. rigid
D. flexible
Question 5
A genetic disorder is caused by a point mutation in a gene that codes for a protein. What type of mutation is this?
A. Frameshift mutation
B. Point mutation
C. Deletion
D. Insertion
Question 6
In a tropical rainforest, the presence of a large number of microorganisms in the soil is due to the high levels of which of the following?
A. Temperature
B. Humidity
C. pH
D. Organic matter
Question 7
In the context of evolutionary theory, what is the primary mechanism driving the adaptation of populations to changing environments?
A. Natural Selection
B. Genetic Drift
C. Gene Flow
D. Mutation
Question 8
A plant is placed in a solution with a high concentration of a certain nutrient. What is the primary effect on the plant's growth?
A. Increased growth rate
B. Decreased growth rate
C. No effect on growth rate
D. Increased root growth
Question 9
The nervous system of an organism consists of two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS includes the brain and spinal cord, while the PNS includes nerves that connect the CNS to the rest of the body. Which of the following is a function of the PNS?
A. Regulation of body temperature
B. Transmission of nerve impulses
C. Production of hormones
D. Maintenance of posture
Question 10
The process by which an organism's genetic information is passed from one generation to the next is known as?
A. Mutation
B. Genetic drift
C. Gene flow
D. Heritability
Question 11
A patient is diagnosed with a bacterial infection caused by a Gram-positive bacterium. Which of the following antibiotics would be most effective against this infection?
A. Penicillin
B. Ciprofloxacin
C. Vancomycin
D. Amoxicillin
Question 12
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. 0.72
D. 0.84
Question 13
A researcher is studying the effect of temperature on the growth of a microorganism. The graph below shows the growth of the microorganism at different temperatures. What is the temperature at which the growth rate is maximum?
A. 30°C
B. 35°C
C. 40°C
D. 45°C
Question 14
A solution of 0.1 M NaCl is prepared by dissolving 5.85 g of NaCl in 1 L of water. What is the concentration of the solution in mol/L?
A. 0.05 M
B. 0.1 M
C. 0.15 M
D. 0.2 M
Question 15
A diagram of the human digestive system is shown below. Which part of the digestive system is responsible for breaking down proteins?
A. Mouth
B. Esophagus
C. Stomach
D. Small intestine

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