POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2023 Biology | Objective

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Question 1 View Details
In the process of osmoregulation, what is the primary mechanism by which the kidneys regulate the concentration of ions in the blood?
Correct A. Reabsorption of ions in the proximal convoluted tubule
B. Secretion of ions in the distal convoluted tubule
C. Excretion of ions in the collecting duct
D. Regulation of ion channels in the renal tubules

Correct Answer: A

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Question 2 View Details
A 25-year-old male presents with symptoms of malabsorption. Which of the following is the most likely cause of his condition?
Correct A. Celiac disease
B. Crohn's disease
C. Ulcerative colitis
D. Whipple's disease

Correct Answer: A

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Question 3 View Details
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
Correct A. Cell wall
B. Nucleus
C. Mitochondria
D. Chloroplast

Correct Answer: A

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Question 4 View Details
A 35-year-old female presents with symptoms of fatigue and weakness. Her blood work reveals a low hemoglobin level. Which of the following is the most likely cause of her condition?
Correct A. Iron deficiency anemia
B. Vitamin B12 deficiency anemia
C. Folate deficiency anemia
D. Sickle cell anemia

Correct Answer: A

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Question 5 View Details
A diagram of a simple circuit is shown below. Identify the part labeled 'A'.
Correct A. Battery
B. Resistor
C. Switch
D. Ammeter

Correct Answer: A

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Question 6 View Details
In a population of 1000 individuals, 50% are heterozygous for the gene controlling the production of the enzyme lactase. If 20% of the population is lactose intolerant, what is the probability that a randomly selected individual is lactose intolerant and homozygous recessive for the gene?
Correct A. 0.05
B. 0.1
C. 0.2
D. 0.25

Correct Answer: A

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Question 7 View Details
A 2.5 L flask contains 1.5 mol of an ideal gas at 27°C. Calculate the pressure of the gas u\sing the ideal gas law.
A. 1.5 atm
Correct B. 2.5 atm
C. 3.5 atm
D. 4.5 atm

Correct Answer: B

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Question 8 View Details
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 9 View Details
A 500 mL flask contains 0.5 mol of an ideal gas at 37°C. Calculate the pressure of the gas u\sing the ideal gas law.
A. 1.5 atm
Correct B. 2.5 atm
C. 3.5 atm
D. 4.5 atm

Correct Answer: B

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Question 10 View Details
A diagram of a human eye is shown below. Identify the part labeled 'B'.
A. Cornea
Correct B. Iris
C. Lens
D. Retina

Correct Answer: B

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Question 11 View Details
In a population of 1000 individuals, 200 are heterozygous for a particular gene, while 300 are homozygous recessive. What is the frequency of the dominant allele?
Correct A. 0.25
B. 0.3
C. 0.35
D. 0.4

Correct Answer: A

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Question 12 View Details
A diagram of the human eye is shown below. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 13 View Details
A diagram of a simple e\cosystem is shown below. Which of the following is a producer in the e\cosystem?
Correct A. Plant
B. Animal
C. Decomposer
D. Consumer

Correct Answer: A

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Question 14 View Details
A diagram of the human body is shown below. Which part of the body is responsible for filtering waste from the blood?
Correct A. Kidney
B. Liver
C. Spleen
D. Pancreas

Correct Answer: A

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Question 15 View Details
A diagram of the human eye is shown below. Which part of the eye is responsible for focu\sing light?
A. Cornea
B. Iris
C. Retina
Correct D. Lens

Correct Answer: D

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Question 16 View Details
A diagram of the human body is shown below. Which part of the body is responsible for regulating body temperature?
Correct A. Sweat Glands
B. Blood Vessels
C. Skeletal Muscle
D. Adrenal Glands

Correct Answer: A

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Question 17 View Details
A diagram of the human body is shown below. Which part of the body is responsible for filtering waste from the blood?
Question 18 View Details
In a photosynthetic pathway, which of the following pigments is primarily responsible for absorbing light energy in the blue-violet region of the visible spectrum?
A. Chlorophyll a
B. Chlorophyll b
C. Carotenoids
Correct D. Phycobiliproteins

Correct Answer: D

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Question 19 View Details
The process of exocytosis involves the fusion of vesicles with the plasma membrane, relea\sing their contents into the extracellular space. Which of the following statements is TRUE about the mechanism of exocytosis?
A. Exocytosis involves the movement of vesicles from the Golgi apparatus to the plasma membrane.
B. Exocytosis is a passive process that relies on diffusion and osmosis.
Correct C. Exocytosis involves the fusion of vesicles with the plasma membrane, relea\sing their contents into the extracellular space.
D. Exocytosis is a type of \endocytosis that involves the uptake of subs\tances from the extracellular space.

Correct Answer: C

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Question 20 View Details
In the human eye, the lens is responsible for focu\sing light onto the retina. Which of the following statements is TRUE about the structure of the lens?
A. The lens is a biconvex shape that allows for a wide field of vision.
B. The lens is a biconcave shape that allows for a narrow field of vision.
Correct C. The lens is a spherical shape that allows for a wide field of vision.
D. The lens is a cylindrical shape that allows for a narrow field of vision.

Correct Answer: C

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Question 21 View Details
The human body has a complex system of organs and tissues that work together to maintain homeostasis. Which of the following statements is TRUE about the role of the kidneys in maintaining homeostasis?
Correct A. The kidneys filter waste products from the blood and excrete them in the urine.
B. The kidneys regulate the amount of water in the body by controlling the amount of urine produced.
C. The kidneys produce hormones that help regulate blood pressure.
D. The kidneys produce enzymes that help digest food in the small intestine.

Correct Answer: A

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Question 22 View Details
The process of digestion involves the breakdown of large molecules of food into smaller molecules that can be absorbed and utilized by the body. Which of the following statements is TRUE about the role of the pancreas in digestion?
Correct A. The pancreas produces enzymes that help break down carbohydrates into simple sugars.
B. The pancreas produces hormones that help regulate blood sugar levels.
C. The pancreas produces enzymes that help break down proteins into amino acids.
D. The pancreas produces enzymes that help break down fats into fatty acids and glycerol.

Correct Answer: A

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Question 23 View Details
The diagram below shows a cross-section of the human eye. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
Correct C. Retina
D. Lens

Correct Answer: C

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Question 24 View Details
The process of meiosis results in the production of which of the following?
A. Somatic cells
Correct B. Germ cells
C. Muscle cells
D. Nerve cells

Correct Answer: B

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Question 25 View Details
The diagram below shows a simple circuit. What is the total resis\tance of the circuit?
Correct A. R1 + R2
B. R1 - R2
C. R1 x R2
D. R1 / R2

Correct Answer: A

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