POST UTME COAL CITY UNIVERSITY 2019 Biology | Objective

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Question 1 View Details
In a population of 1000 individuals, 80% are heterozygous for the ABO blood group gene, 15% are homozygous dominant, and 5% are homozygous recessive. What is the genotype of the individual that is heterozygous for the ABO blood group gene?
A. IA
Correct B. IA
C. ii
D. Ii

Correct Answer: B

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Question 2 View Details
A diagram of the human respiratory system is shown below. What is the function of the alveoli?
Correct A. Exchange of oxygen and carbon dioxide
B. Filtering of dust and other particles
C. Production of mucus
D. Regulation of body temperature

Correct Answer: A

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Question 3 View Details
A 2.5-liter solution of 0.5 M NaCl is diluted to 5 liters. What is the new concentration of NaCl?
A. 0.2 M
Correct B. 0.25 M
C. 0.3 M
D. 0.35 M

Correct Answer: B

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Question 4 View Details
A diagram of the human circulatory system is shown below. What is the function of the heart?
A. Pumping blood to the lungs
B. Pumping blood to the brain
Correct C. Pumping blood to the muscles
D. Pumping blood to the liver

Correct Answer: C

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Question 5 View Details
A 5-liter solution of 0.2 M HCl is mixed with a 2.5-liter solution of 0.5 M NaOH. What is the pH of the resulting solution?
A. 1
Correct B. 2
C. 3
D. 4

Correct Answer: B

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Question 6 View Details
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 following protein complex:
Correct A. Anaphase-promoting complex (APC)
B. Prophase-promoting complex (PPC)
C. Mitotic spindle checkpoint (MSC)
D. Cyclin-dep\endent kinase (CDK)

Correct Answer: A

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Question 7 View Details
The following diagram shows a cross-section of a plant root. Identify the structure labeled 'A':
Correct A. Xylem
B. Phloem
C. Cortex
D. Endodermis

Correct Answer: A

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Question 8 View Details
The following equation represents the binding of oxygen to hemoglobin:
A. Endothermic reaction
B. Exothermic reaction
Correct C. Reversible reaction
D. Irreversible reaction

Correct Answer: C

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Question 9 View Details
The following diagram shows a cross-section of a human eye. Identify the structure labeled 'B':
A. Cornea
Correct B. Lens
C. Retina
D. Iris

Correct Answer: B

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Question 10 View Details
The following equation represents the reaction of glu\cose with oxygen to produce carbon dioxide and water:
A. Endothermic reaction
Correct B. Exothermic reaction
C. Reversible reaction
D. Irreversible reaction

Correct Answer: B

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Question 11 View Details
In a tropical rainforest, the nutrient cycle is primarily driven by the decomposition of organic matter by which of the following organisms?
A. Fungi
Correct B. Bacteria
C. Protozoa
D. Rotifers

Correct Answer: B

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Question 12 View Details
The xylem in plants is responsible for transporting water and minerals from the roots to the leaves through the process of
A. Transpiration
Correct B. Translocation
C. Osmosis
D. Diffusion

Correct Answer: B

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Question 13 View Details
The process of cellular respiration in plants involves the breakdown of glu\cose to produce energy in the form of
Correct A. ATP
B. NADH
C. FADH2
D. Pyruvate

Correct Answer: A

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Question 14 View Details
The structure of a plant cell consists of a cell wall, cytoplasm, and a nucleus, which are all enclosed by a
A. Cell membrane
Correct B. Plasma membrane
C. Mitochondria
D. Chloroplast

Correct Answer: B

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Question 15 View Details
The process of mitosis in plants results in the production of
Correct A. Two daughter cells with the same number of chromosomes
B. Four daughter cells with the same number of chromosomes
C. Two daughter cells with a different number of chromosomes
D. Four daughter cells with a different number of chromosomes

Correct Answer: A

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Question 16 View Details
In the process of cellular respiration, what is the primary function of the electron transport chain?
A. To generate ATP through substrate-level phosphorylation
Correct B. To pump protons across the mitochondrial membrane
C. To produce NADH and FADH2
D. To reduce oxygen to water

Correct Answer: B

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Question 17 View Details
Which of the following statements about the excretory system is false?
A. The kidneys filter waste products from the blood
B. The liver produces bile to aid in digestion
C. The skin helps to regulate body temperature
Correct D. The lungs are responsible for removing waste products from the blood

Correct Answer: D

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Question 18 View Details
A patient is diagnosed with a bacterial infection. Which of the following antibiotics would be most effective against this type of infection?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
Correct D. Vancomycin

Correct Answer: D

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Question 19 View Details
A cell is in the process of mitosis. Which of the following stages is characterized by the separation of sister chromatids?
A. Prophase
B. Metaphase
Correct C. Anaphase
D. Telophase

Correct Answer: C

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Question 20 View Details
A patient is experiencing difficulty seeing objects at a dis\tance. Which of the following sense organs is responsible for this type of vision?
A. Cornea
B. Iris
Correct C. Lens
D. Retina

Correct Answer: C

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Question 21 View Details
In the context of hormonal coordination, what is the primary function of the hypothalamic-pituitary-adrenal (HPA) axis?
A. Regulation of body temperature
Correct B. Maintenance of homeostasis
C. Stimulation of reproductive processes
D. Modulation of the immune response

Correct Answer: B

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Question 22 View Details
Asexual reproduction in plants can occur through the process of
A. Budding
Correct B. Fragmentation
C. Runners
D. Spores

Correct Answer: B

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Question 23 View Details
The process of gas exchange in the lungs involves the diffusion of oxygen from the alveoli into the blood and the diffusion of carbon dioxide from the blood into the alveoli. What is the primary mechanism responsible for this diffusion?
A. Osmosis
B. Active transport
Correct C. Diffusion
D. Osmotic pressure

Correct Answer: C

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Question 24 View Details
A genetic variation that results in a change in the amino acid sequence of a protein is an example of
Correct A. Point mutation
B. Frameshift mutation
C. Gene duplication
D. Gene deletion

Correct Answer: A

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Question 25 View Details
The xylem in plants is responsible for transporting
Correct A. Water and minerals
B. Sugars and amino acids
C. Hormones and waste products
D. Oxygen and carbon dioxide

Correct Answer: A

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