POST UTME DELSU 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of the human respiratory system is shown below. Which part of the system is responsible for exchanging oxygen and carbon dioxide between the lungs and the bloodstream?
A. Trachea
B. Bronchi
C. Alveoli
D. Lungs
Question 2
The process of digestion in the human body involves the breakdown of complex molecules into simpler ones. Which of the following enzymes is responsible for breaking down proteins into amino acids?
A. Pep\sin
B. Tryp\sin
C. Lactase
D. Amylase
Question 3
A researcher is studying the effect of temperature on the rate of respiration in yeast cells. The researcher measures the rate of respiration at different temperatures and plots the data on a graph. If the graph shows a linear relationship between temperature and respiration rate, what is the most likely explanation for this observation?
A. The yeast cells are more active at higher temperatures.
B. The yeast cells have a higher metabolic rate at higher temperatures.
C. The yeast cells have a lower metabolic rate at higher temperatures.
D. The yeast cells are more resis\tant to heat stress.
Question 4
What is the primary function of the epidermis in the skin?
A. To produce sweat that helps to regulate body temperature
B. To produce sebum that helps to lubricate the skin
C. To produce melanin that helps to protect the skin from UV radiation
D. To produce keratin that helps to strengthen the skin
Question 5
What is the primary function of the olfactory epithelium in the nasal cavity?
A. To produce mucus that traps dust and other particles
B. To produce cilia that move mucus and trapped particles towards the pharynx
C. To detect odorant molecules and transmit signals to the brain
D. To produce tears that lubricate the eyes
Question 6
The process of active transport requires the use of energy to move molecules against their concentration gradient. Which of the following types of active transport is characterized by the use of a protein pump to move molecules across the cell membrane?
A. Sodium-potassium pump
B. Proton pump
C. Calcium pump
D. Potassium pump
Question 7
A researcher studying the genetics of a particular trait in a population of organisms discovers that the trait is controlled by a \single gene with two alleles. Which of the following is a possible genotype of an individual that is homozygous dominant for the trait?
A. BB
B. Bb
C. bb
D. bB
Question 8
A population of bacteria is growing exponentially. If the initial population size is 100 and the growth rate is 20% per hour, what will be the population size after 3 hours?
A. 1000
B. 2000
C. 4000
D. 8000
Question 9
In the process of diffusion, what is the driving force behind the movement of molecules from an area of high concentration to an area of low concentration?
A. Osmosis
B. Active transport
C. Passive transport
D. Brownian motion
Question 10
The process of photosynthesis occurs in the chloroplasts of plant cells. Which of the following equations represents the overall equation for photosynthesis?
A. \( 6CO_2 + 6H_2O + light \rightarrow C_6H_{12}O_6 + 6O_2 \)
B. \( 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2 \)
C. \( 6CO_2 + 6H_2O + light \rightarrow C_6H_{12}O_6 \)
D. \( 6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 \)
Question 11
In a population of 1000 individuals, 70% have the dominant allele for brown eyes (B) and 30% have the recessive allele for blue eyes (b). If two individuals with brown eyes are randomly selected for a study, what is the probability that they are both homozygous dominant (BB) for eye color?
A. 0.49
B. 0.51
C. 0.67
D. 0.75
Question 12
A species of bird has a beak length of 5 cm. If the beak length increases by 10% per generation, what will be the beak length of the bird's offspring?
A. 4.5 cm
B. 5.5 cm
C. 6 cm
D. 6.5 cm
Question 13
A diagram of the human kidney is shown below. What is the function of the part labeled 'B'?
A. To filter waste from the blood
B. To regulate the amount of water in the body
C. To produce hormones that regulate blood pressure
D. To regulate the amount of electrolytes in the body
Question 14
A diagram of a simple circuit is shown below. What is the current flowing through the 2-ohm resistor?
A. 0.5 A
B. 1 A
C. 2 A
D. 4 A
Question 15
A 2-year-old child is diagnosed with a genetic disorder that causes an inability to break down certain amino acids. The child's parents are both carriers of the recessive allele for this disorder. What is the probability that their next child will be affected by the disorder?
A. 0.25
B. 0.50
C. 0.75
D. 0.90

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