POST UTME OSUSTECH 2019 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 35-year-old man presents with a 2-year history of progressive weakness and wasting of the proximal muscles of the lower limbs. Which of the following muscle groups is most likely affected?
A. Sartorius
B. Rectus Femoris
C. Adductor Magnus
D. Tibialis Anterior
Question 2
A diagram of a neuron is shown below. What is the function of the part labeled 'D'?
A. To transmit signals to other neurons
B. To receive signals from other neurons
C. To synthesize neurotransmitters
D. To store genetic information
Question 3
In the xylem, what is the primary function of the tracheids?
A. Transport of water and minerals from roots to leaves
B. Transport of sugars and amino acids from leaves to roots
C. Storage of water and nutrients in the stem
D. Support and structure of the plant
Question 4
A plant has a root system that is adapted to absorb water from a dry soil. What type of adaptation is this an example of?
A. Adaptation to drought
B. Adaptation to flooding
C. Adaptation to poor soil
D. Adaptation to high altitude
Question 5
A diagram of a mitotic spindle is shown below. Which of the following is a function of the mitotic spindle?
A. Separation of chromosomes during mitosis
B. Formation of the nuclear envelope
C. Organization of the cytoskeleton
D. Regulation of cell growth
Question 6
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 0.05 per hour, what is the population size after 5 hours?
A. 1000
B. 500
C. 2000
D. 2500
Question 7
A plant cell is placed in a solution with a high concentration of sucrose. Which of the following would be the most likely effect on the cell?
A. The cell would swell and eventually burst
B. The cell would shrink and lose water
C. The cell would remain unchanged
D. The cell would grow and divide
Question 8
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. 0.64
B. 0.36
C. 0.16
D. 0.84
Question 9
Which of the following types of cells is characterized by the presence of a large nucleus and a small amount of cytoplasm?
A. Prokaryotic cell
B. Eukaryotic cell
C. Animal cell
D. Plant cell
Question 10
What is the process by which plants release water vapor into the air?
A. Transpiration
B. Respiration
C. Photosynthesis
D. Evaporation
Question 11
Which of the following is an example of a symbiotic relationship?
A. Predator-prey relationship
B. Competition for resources
C. Mutualism between clownfish and sea anemone
D. Parasitism between tapeworm and host
Question 12
What is the term for the movement of molecules from an area of high concentration to an area of low concentration?
A. Osmosis
B. Diffusion
C. Active transport
D. Passive transport
Question 13
A species of fish has a streamlined body shape that allows it to swim quickly through the water. However, this body shape also makes it difficult for the fish to maneuver in tight spaces. What type of trade-off is this an example of?
A. Speed vs. maneuverability trade-off
B. Specialization trade-off
C. Generalization trade-off
D. Adaptation trade-off
Question 14
A plant has a photosynthetic rate of 10 μmol CO2 s-1. If the plant is exposed to light for 8 hours, how much CO2 is fixed?
A. 80 μmol
B. 160 μmol
C. 320 μmol
D. 640 μmol
Question 15
A diagram of a cell membrane is shown below. Which of the following is a function of the cell membrane?
A. Regulation of cell growth
B. Transport of materials into and out of the cell
C. Maintenance of cell shape
D. Production of ATP

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