POST UTME IGBINEDION UNIVERSITY 2019 Biology | Objective

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Question 1
The classification of living things is based on their shared characteristics and evolutionary relationships. Which of the following is a characteristic of the kingdom Animalia?
A. They are multicellular and eukaryotic.
B. They are unicellular and prokaryotic.
C. They are multicellular and eukaryotic, and they have a nervous system.
D. They are unicellular and eukaryotic, and they have a cell wall.
Question 2
A patient with a genetic disorder has a mutation in the HBB gene, which codes for the \beta-globin subunit of hemoglobin. What type of mutation is this?
A. Point mutation
B. Frameshift mutation
C. Deletion mutation
D. Insertion mutation
Question 3
The diagram below shows a cross-section of a plant root. What is the primary function of the xylem tissue in this region?
A. To transport water and minerals from the soil to the leaves
B. To store starch and other nutrients
C. To support the structure of the root
D. To produce hormones that regulate plant growth
Question 4
Which of the following types of tissue is characterized by its ability to contract and relax?
A. Epithelial tissue
B. Connective tissue
C. Muscle tissue
D. Nervous tissue
Question 5
Which of the following types of nutrition is characterized by the breakdown of complex molecules into simpler ones?
A. Photosynthesis
B. Digestion
C. Respiration
D. Fermentation
Question 6
A diagram of the human digestive system is shown below. Identify the part labeled B.
A. Esophagus
B. Stomach
C. Small intestine
D. Large intestine
Question 7
The nervous system coordinates the body's activities through a network of specialized cells called neurons. Which of the following is a characteristic of neurons?
A. They have a large nucleus and a small amount of cytoplasm.
B. They have a small nucleus and a large amount of cytoplasm.
C. They have no nucleus and a large amount of cytoplasm.
D. They have a large amount of cytoplasm and no nucleus.
Question 8
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 by 0.25 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, what is the maximum speed of the block?
A. 0.5 m/s
B. 1.0 m/s
C. 1.5 m/s
D. 2.0 m/s
Question 9
The process of photosynthesis in plants involves the conversion of light energy into chemical energy, which is stored in the form of glu\cose. What is the primary reac\tant in this process?
A. Carbon dioxide
B. Water
C. Glu\cose
D. Oxygen
Question 10
A plant has a root system that consists of 10 roots, each with a length of 10 cm. The plant also has a stem with a length of 50 cm. What is the total length of the plant's root system and stem?
A. 500 cm
B. 600 cm
C. 700 cm
D. 800 cm
Question 11
In the context of photosynthesis, what is the primary function of the thylakoid membrane?
A. To facilitate the transfer of electrons during the light-dep\endent reactions
B. To regulate the concentration of ATP and NADPH
C. To synthesize glu\cose from CO2 and H2O
D. To absorb light energy from the sun
Question 12
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 protein kinase Cdc28. What is the primary function of the Cdc28 protein kinase in this context?
A. To phosphorylate and activate the cyclin-dep\endent kinase
B. To inhibit the activity of the anaphase-promoting complex
C. To regulate the expression of the histone genes
D. To control the spindle checkpoint
Question 13
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Vacuole
Question 14
A diagram of a human brain is shown below. Which part of the brain is responsible for controlling voluntary movements?
A. Cerebrum
B. Cerebellum
C. Brainstem
D. Spinal Cord
Question 15
A researcher is studying the effect of pH on the growth of a microorganism. The researcher measures the growth of the microorganism at different pH levels and obtains the following data: at pH 4, the growth is 0.5 cm; at pH 5, the growth is 1.0 cm; at pH 6, the growth is 1.5 cm; at pH 7, the growth is 2.0 cm; at pH 8, the growth is 2.5 cm; and at pH 9, the growth is 3.0 cm. What is the pH at which the growth of the microorganism is maximum?
A. 5
B. 6
C. 7
D. 8

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