POST UTME DELSU 2024 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
In a photosynthetic pathway, which enzyme catalyzes the conversion of ribulose-1,5-bisphosphate to 3-phosphoglycerate?
A. Ribulose-1,5-bisphosphate carboxylase/oxygenase
B. Phosphoglycerate kinase
C. Triosephosphate isomerase
D. Glyceraldehyde-3-phosphate dehydrogenase
Question 2
In a closed e\cosystem, what is the primary mechanism by which energy is transferred from one trophic level to the next?
A. Decomposition
B. Herbivory
C. Omnivory
D. Detritivory
Question 3
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light and s\ending signals to the brain?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 4
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 5
The diagram below shows a simplified representation of the human eye. Which of the following structures is responsible for detecting light and transmitting visual signals to the brain?
A. Cornea
B. Lens
C. Retina
D. Iris
Question 6
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 7
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 8
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 9
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. To focus light on the retina
B. To re\fract light entering the eye
C. To detect changes in light intensity
D. To regulate the amount of light entering the eye
Question 10
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 11
A 5-year-old child is experiencing a high fever and is vomiting. Which of the following is a likely cause of this condition?
A. A viral infection
B. A bacterial infection
C. A parasitic infection
D. A fungal infection
Question 12
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 13
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 14
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 15
A researcher is studying the effect of pH on the growth of E. coli bacteria. The researcher measures the growth rate of the bacteria at different pH levels and plots the data on a graph. If the graph shows a sigmoidal curve with a maximum growth rate at pH 7, what is the most likely explanation for this observation?
A. The bacteria are more resis\tant to acidic environments.
B. The bacteria are more resis\tant to basic environments.
C. The bacteria have an optimal growth rate at pH 7.
D. The bacteria have a maximum growth rate at pH 7.

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