POST UTME PAN-ATLANTIC UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
The sense organ responsible for detecting changes in light intensity is the?
A. Eye
B. Ear
C. Nose
D. Mouth
Question 2
A plant with a height of 10 cm is placed in a growth chamber with a temperature of 25°C. The plant grows at a rate of 0.5 cm/h. How long will it take for the plant to reach a height of 20 cm?
A. 20 hours
B. 40 hours
C. 60 hours
D. 80 hours
Question 3
A diagram of a human respiratory system is shown below. Identify the pathway by which air enters the lungs.
A. Trachea
B. Bronchi
C. Alveoli
D. Diaphragm
Question 4
The  
A. photosynthesis
B. respiration
C. transpiration
D. osmosis
Question 5
The process of asexual reproduction in which a new individual is produced from a part of a parent's body is called?
A. Binary fission
B. Budding
C. Fragmentation
D. Regeneration
Question 6
A cell with a volume of 100 μm³ has a surface area of 50 μm². What is the surface-to-volume ratio of the cell?
A. 0.5
B. 1
C. 2
D. 5
Question 7
In a photosynthetic process, light energy is absorbed by pigments such as chlorophyll and converted into chemical energy. What is the primary pigment responsible for absorbing light energy in the blue-violet region of the visible spectrum?
A. Chlorophyll a
B. Chlorophyll b
C. Phycocyanin
D. Phycoerythrin
Question 8
The xylem tissue in plants is responsible for transporting water and minerals from the roots to the leaves. Which of the following statements is true about the xylem?
A. It is a type of vascular tissue found in the phloem.
B. It transports water and minerals from the roots to the leaves.
C. It is responsible for photosynthesis in the leaves.
D. It is a type of meristematic tissue found in the roots.
Question 9
A diagram of a plant cell is shown below. Identify the organelle responsible for protein synthesis.
A. Nucleus
B. Ribosome
C. Mitochondria
D. Endoplasmic reticulum
Question 10
The  
A. DNA replication
B. transcription
C. translation
D. transduction
Question 11
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the π-tubulin complex. What is the primary function of the π-tubulin complex in this process?
A. To form the mitotic spindle
B. To break down the nuclear envelope
C. To condense the chromatin
D. To separate the sister chromatids
Question 12
In a tropical rainforest e\cosystem, what is the primary role of the emergent layer?
A. To provide shade and shelter for smaller animals
B. To intercept and block sunlight, reducing photosynthesis in the forest floor
C. To serve as a habitat for epiphytes and other organisms
D. To act as a firebreak, preventing forest fires from spreading
Question 13
A microorganism is isolated from a patient's blood culture and identified as Staphylococcus aureus. What is the primary mechanism of antibiotic resis\tance in this organism?
A. Beta-lactamase production
B. Efflux pumps
C. Cell wall modifications
D. Horizontal gene transfer
Question 14
A couple is trying to conceive, but the female partner has a history of recurrent miscarriages. What is the most likely cause of this condition?
A. Chromosomal abnormalities
B. Endocrine disorders
C. Immuno\logical disorders
D. Uterine anomalies
Question 15
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, which is triggered by the activation of the  
A. proteolytic enzymes
B. calcium ions
C. kinases
D. phosphatases

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