POST UTME UNILORIN 2020 Biology | Objective

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Question 1
In the context of respiration, what is the primary function of the mitochondria?
A. To synthesize ATP from glu\cose
B. To break down glu\cose to produce energy
C. To regulate the pH of the blood
D. To transport oxygen to the cells
Question 2
A population of bacteria is growing exponentially. If the initial population size is 100 and the population doubles every 2 hours, what is the population size after 6 hours?
A. 1600
B. 1200
C. 800
D. 600
Question 3
In a population of 100 individuals, the frequency of the dominant allele is 0.8. What is the expected frequency of the recessive allele?
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Question 4
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 5
A diagram of the human eye is shown below. Which part of the eye is responsible for regulating the amount of light entering the eye?
A. Cornea
B. Iris
C. Lens
D. Retina
Question 6
A diagram of a neuron is shown below. Which part of the neuron is responsible for transmitting signals to other neurons?
A. D\endrite
B. Axon
C. Cell body
D. Myelin sheath
Question 7
A diagram of the human skeletal system is shown below. Which part of the diagram is responsible for protecting the heart and lungs?
A. The ribcage
B. The sternum
C. The spine
D. The pelvis
Question 8
A 3-year-old child is diagnosed with a rare genetic disorder characterized by the inability to synthesize the amino acid tyro\sine. Which of the following enzymes is deficient in this disorder?
A. Phenylalanine hydroxylase
B. Tyro\sine aminotransferase
C. Dihydropteridine reductase
D. GTP cyclohydrolase
Question 9
Which of the following is an example of asexual reproduction in plants?
A. Budding
B. Fragmentation
C. Spore formation
D. Pollination
Question 10
In the context of eco\logy, what is the primary function of a keystone species in a given biome?
A. To occupy a unique eco\logical niche
B. To regulate the population of other species
C. To facilitate the process of nutrient cycling
D. To maintain the structural complexity of the e\cosystem
Question 11
A diagram of a mitotic cell division is shown below. Which stage of the cell cycle is represented by the diagram?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 12
Which of the following is an example of a sexual reproduction in animals?
A. Fertilization
B. Meiosis
C. Mitosis
D. Apoptosis
Question 13
A diagram of the human respiratory system is shown below. Which part of the diagram is responsible for the exchange of oxygen and carbon dioxide?
A. The trachea
B. The diaphragm
C. The lungs
D. The bronchi
Question 14
In the context of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP from NADH and FADH2
B. To regulate the cell cycle
C. To synthesize ATP from glu\cose
D. To break down glu\cose into pyruvate
Question 15
What is the term for the process by which plants grow and develop from a \single cell?
A. Mitosis
B. Meiosis
C. Apoptosis
D. Differentiation

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