POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2024 Biology | Objective

Are you preparing for POST UTME JOSEPH AYO BABALOLA UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2024 Biology (Objective) questions designed to simulate the real exam environment.

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Question 1
In a typical angiosperm, what is the primary function of the xylem tissue in the vascular cylinder?
Correct A. Transport of water and minerals from the roots to the leaves
B. Transport of sugars and other organic compounds from the leaves to the roots
C. Support and structure for the plant body
D. Storage of food and other nutrients

Correct Answer: A

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Question 2
A diagram of a plant cell is shown below. Identify the part labeled A.
Correct A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole

Correct Answer: A

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Question 3
In a typical animal cell, what is the primary function of the Golgi apparatus?
A. Synthesis of proteins
Correct B. Modification and packaging of proteins and lipids
C. Transport of materials across the cell membrane
D. Regulation of cell growth and division

Correct Answer: B

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Question 4
A diagram of a human eye is shown below. Identify the part labeled A.
Correct A. Cornea
B. Iris
C. Retina
D. Lens

Correct Answer: A

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Question 5
In a typical plant cell, what is the primary function of the vacuole?
Correct A. Storage of water and salts
B. Storage of sugars and other organic compounds
C. Regulation of cell growth and division
D. Transport of materials across the cell membrane

Correct Answer: A

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Question 6
In a desert e\cosystem, a cactus plant has adapted to store water in its stems. Which of the following is a consequence of this adaptation?
Correct A. The cactus plant can survive for longer periods without water.
B. The cactus plant can grow faster than other plants in the desert.
C. The cactus plant can produce more seeds than other plants in the desert.
D. The cactus plant can tolerate high temperatures better than other plants in the desert.

Correct Answer: A

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Question 7
A hormone that stimulates the breakdown of glycogen to glu\cose in the liver is
Correct A. Glucagon
B. Insulin
C. Epinephrine
D. Growth Hormone

Correct Answer: A

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Question 8
The process by which plants convert light energy into chemical energy is called
Correct A. Photosynthesis
B. Respiration
C. Transpiration
D. Translocation

Correct Answer: A

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Question 9
The xylem in a plant transports
Correct A. Water and minerals from the roots to the leaves.
B. Sugars and amino acids from the leaves to the roots.
C. Hormones and other signaling molecules throughout the plant.
D. Waste products from the leaves to the roots.

Correct Answer: A

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Question 10
The nervous system in an animal is responsible for
A. Regulating body temperature.
B. Controlling movement and balance.
Correct C. Proces\sing and storing information.
D. Producing hormones and other signaling molecules.

Correct Answer: C

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Question 11
In the context of osmoregulation, what is the primary function of the hypothalamus in regulating thirst and hunger?
A. To regulate body temperature
B. To control blood pressure
Correct C. To regulate thirst and hunger
D. To regulate electrolyte balance

Correct Answer: C

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Question 12
A diagram of a plant's xylem and phloem is shown below. What is the primary function of the xylem in this diagram?
Correct A. To transport water and minerals
B. To transport sugars and amino acids
C. To regulate stomatal opening
D. To control leaf movement

Correct Answer: A

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Question 13
A diagram of the human nervous system is shown below. What is the primary function of the cerebellum in this diagram?
A. To regulate body temperature
Correct B. To control movement and balance
C. To regulate heart rate
D. To control digestion

Correct Answer: B

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Question 14
A diagram of the human excretory system is shown below. What is the primary function of the kidneys in this diagram?
A. To regulate blood pressure
Correct B. To filter waste from the blood
C. To regulate electrolyte balance
D. To control urine production

Correct Answer: B

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Question 15
A diagram of the human circulatory system is shown below. What is the primary function of the heart in this diagram?
A. To regulate blood pressure
Correct B. To pump blood throughout the body
C. To regulate electrolyte balance
D. To control digestion

Correct Answer: B

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Question 16
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'BB'?
Correct A. 0.36
B. 0.64
C. 0.72
D. 0.84

Correct Answer: A

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Question 17
A 2.5 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced 0.15 m from its equilibrium position and released from rest. What is the speed of the block when it passes through the equilibrium position?
A. 1.5 m/s
Correct B. 2.5 m/s
C. 3.5 m/s
D. 4.5 m/s

Correct Answer: B

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Question 18
A certain species of bacteria doubles in population every 2 hours. If the initial population is 1000 cells, how many cells will there be after 6 hours?
A. 1000000
B. 2000000
Correct C. 4000000
D. 8000000

Correct Answer: C

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Question 19
A 5.0 L container is filled with 2.0 mol of an ideal gas at 25°C. What is the pressure of the gas?
Correct A. 101325 Pa
B. 202650 Pa
C. 303875 Pa
D. 405100 Pa

Correct Answer: A

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Question 20
A certain species of plant has a photosynthetic rate of 10 mg CO2/h. If the plant is exposed to light for 8 hours, how much CO2 will it absorb?
Correct A. 80 mg
B. 160 mg
C. 240 mg
D. 320 mg

Correct Answer: A

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Question 21
In a photosynthetic pathway, which of the following is the primary function of the enzyme RuBisCO?
Correct A. Fixing CO2 into a 3-carbon molecule
B. Regenerating RuBP from 3-PGA
C. Reducing CO2 to formic acid
D. Oxidizing NADPH to form ATP

Correct Answer: A

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Question 22
A 30-year-old woman presents with primary amenorrhea. Her karyotype is 46,XX. What is the most likely cause of her condition?
A. Turner syndrome
B. Androgen insensitivity syndrome
Correct C. Mayer-Roki\tansky-Küster-Hauser syndrome
D. Swyer syndrome

Correct Answer: C

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Question 23
A 35-year-old man presents with a 2-year history of progressive dyspnea. His chest X-ray shows a large right-sided pleural effusion. What is the most likely diagnosis?
A. Pulmonary embolism
Correct B. Lung cancer
C. Tuberculosis
D. Congestive heart failure

Correct Answer: B

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Question 24
A 25-year-old woman presents with a 6-month history of recurrent episodes of abdominal pain. Her abdominal ultrasound shows a large ovarian cyst. What is the most likely diagnosis?
A. Ectopic pregnancy
B. Ovarian torsion
Correct C. Ovarian cyst
D. Endometriosis

Correct Answer: C

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Question 25
A 40-year-old man presents with a 10-year history of progressive hearing loss. His audiogram shows a flat bone conduction threshold. What is the most likely diagnosis?
A. Noise-induced hearing loss
B. Presbycusis
C. Meniere's disease
Correct D. Otosclerosis

Correct Answer: D

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