POST UTME LEAD CITY UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The process of photosynthesis in plants involves the conversion of light energy into chemical energy in the form of glu\cose. Which of the following is a byproduct of this process?
A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen
Question 2
A tissue consists of 80% epithelial cells, 15% connective tissue cells, and 5% muscle cells. If the tissue has a total of 1000 cells, how many muscle cells are present?
A. 40
B. 50
C. 60
D. 70
Question 3
The process of digestion in the human body involves the breakdown of food into smaller molecules that can be absorbed and utilized by the body. Which of the following enzymes is responsible for breaking down proteins?
A. Amylase
B. Lipase
C. Tryp\sin
D. Lactase
Question 4
In the context of blood transport systems, what is the primary function of the erythrocytes?
A. To regulate blood pH
B. To transport oxygen and carbon dioxide
C. To maintain blood pressure
D. To filter waste products
Question 5
A population of bacteria is growing exponentially with a growth rate of 0.2 per hour. If the initial population size is 100, what is the population size after 5 hours?
A. 1000
B. 5000
C. 10000
D. 20000
Question 6
In a population of 1000 individuals, 70% are heterozygous for the gene controlling flower color, 20% are homozygous dominant, and 10% are homozygous recessive. What is the expected frequency of the recessive allele in this population?
A. 0.15
B. 0.20
C. 0.25
D. 0.30
Question 7
The theory of evolution by natural selection was first proposed by
A. Charles Darwin
B. Gregor M\endel
C. Jean-Baptiste Lamarck
D. Alfred Russel Wallace
Question 8
In a xylem vessel, the primary function of the lignified secondary cell walls is to provide structural support and
A. facilitate the transport of water and minerals
B. resist the negative pressure forces during transpiration
C. regulate the rate of transpiration
D. absorb water and minerals from the soil
Question 9
In the context of osmoregulation, what is the primary function of the kidneys in a hypertonic environment?
A. To eliminate excess water
B. To concentrate the urine
C. To dilute the blood
D. To regulate electrolyte balance
Question 10
A desert e\cosystem is characterized by low precipitation and high temperatures. Which of the following biomes is most likely to be found in this type of environment?
A. Tropical Rainforest
B. Desert
C. Temperate Grassland
D. Temperate Deciduous Forest
Question 11
In a cell undergoing mitosis, what is the stage at which the chromosomes are most condensed?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Question 12
The microorganism responsible for the disease tuberculosis is
A. Escherichia coli
B. Staphylococcus aureus
C. Mycobacterium tuberculosis
D. Salmonella typhi
Question 13
A 2-year-old child is brought to the emergency room with a history of vomiting and diarrhea. The child's blood pressure is 80/40 mmHg, and the pulse rate is 120 beats per minute. Which of the following is the most likely cause of this child's condition?
A. Viral gastroenteritis
B. Bacterial gastroenteritis
C. Inflammatory bowel disease
D. Gastrointestinal obstruction
Question 14
A diagram shows a plant with a root system consisting of a taproot and a system of smaller roots. What is the function of the smaller roots?
A. absorption of water and nutrients
B. storage of food
C. support of the plant
D. regulation of water balance
Question 15
A species of bird has a beak length of 5 cm. If the beak length is normally distributed with a mean of 4 cm and a s\tandard deviation of 0.5 cm, what is the probability that a randomly selected bird will have a beak length greater than 5.5 cm?
A. 0.001
B. 0.01
C. 0.1
D. 0.5

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