POST UTME NOUN 2018 Biology | Objective

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Question 1
A diagram of the human skeletal system is shown below. What is the primary function of the sternocleidomastoid muscle?
A. To rotate the head
B. To flex the neck
C. To ext\end the neck
D. To rotate the torso
Question 2
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 3
The nervous system is responsible for transmitting signals from the brain to the rest of the body. Which of the following is a type of neuron that is responsible for transmitting signals from sensory receptors to the spinal cord?
A. Motor neuron
B. Sensory neuron
C. Interneuron
D. Glia cell
Question 4
A diagram of a simple e\cosystem is shown below. Identify the producer in the e\cosystem.
A. Plant
B. Herbivore
C. Carnivore
D. Decomposer
Question 5
A diagram of the human eye is shown below. What is the primary function of the ciliary muscles?
A. To focus light on the retina
B. To regulate the amount of light entering the eye
C. To move the lens
D. To detect color
Question 6
A plant cell has a cell wall, chloroplasts, and a large central vacuole. What is the primary function of the cell wall?
A. To provide structural support
B. To regulate gas exchange
C. To synthesize proteins
D. To store water
Question 7
In a population of 1000 individuals, 200 have the genotype AA, 400 have the genotype Aa, and 400 have the genotype aa. What is the frequency of the recessive allele 'a'?
A. 0.2
B. 0.4
C. 0.6
D. 0.8
Question 8
The process of evolution is driven by the variation in traits among individuals in a population. Which of the following is an example of a trait that can vary among individuals in a population?
A. Eye color
B. Height
C. Skin color
D. Hair color
Question 9
A plant cell is shown below. What is the function of the mitochondria?
A. Photosynthesis
B. Cell signaling
C. Cellular respiration
D. Protein synthesis
Question 10
A diagram of the human respiratory system is shown below. What is the function of the alveoli?
A. Exchange of oxygen and carbon dioxide
B. Filtering of dust and other particles
C. Production of mucus
D. Regulation of body temperature
Question 11
Which of the following biomes is characterized by a high level of biodiversity and is often referred to as the 'lungs of the Earth'?
A. Rainforest
B. Desert
C. Grassland
D. Tundra
Question 12
A microorganism is a type of organism that is microscopic in size. Which of the following is an example of a microorganism?
A. Bacteria
B. Virus
C. Fungi
D. Algae
Question 13
In a photosynthetic process, what is the term for the light-dep\endent reactions?
A. Light-indep\endent reactions
B. Calvin cycle
C. Light-dep\endent reactions
D. Photorespiration
Question 14
In a tropical rainforest e\cosystem, the primary producers are plants that undergo photosynthesis to produce glu\cose and oxygen. Which of the following is a characteristic of the photosynthetic process in these plants?
A. The process occurs in the mitochondria.
B. The process requires light energy from the sun.
C. The process produces glu\cose and oxygen as byproducts.
D. The process occurs in the absence of light.
Question 15
In a eukaryotic cell, the process of mitosis is initiated by the breakdown of the nuclear envelope, resulting in the release of the chromosomes into the cytoplasm. Which of the following structures is responsible for the breakdown of the nuclear envelope?
A. Centrioles
B. Nuclear lamina
C. Mitotic spindle
D. Cytoskeleton

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