POST UTME UNN 2020 Biology | Objective

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Question 1
The process of photosynthesis in plants involves the conversion of light energy into chemical energy. Which of the following is a byproduct of this process?
A. Oxygen
B. Carbon dioxide
C. Water
D. Glu\cose
Question 2
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 blood
C. Production of mucus
D. Regulation of body temperature
Question 3
Asexual reproduction in bacteria is primarily facilitated by which of the following processes?
A. Binary fission
B. Mitosis
C. Meiosis
D. Budding
Question 4
In the context of genetics, what is the term for the process by which a gene is turned on or off?
A. Gene expression
B. Gene mutation
C. Gene regulation
D. Gene replication
Question 5
A patient is experiencing a severe headache and is diagnosed with a brain tumor. Which of the following sense organs is most likely to be affected?
A. Eye
B. Ear
C. Nose
D. Brain
Question 6
A plant cell is placed in a solution with a high concentration of sucrose. Which of the following will occur?
A. The plant cell will shrink
B. The plant cell will swell
C. The plant cell will remain unchanged
D. The plant cell will burst
Question 7
A diagram of a human respiratory system is shown below. Identify the part labeled 'B'.
A. Trachea
B. Lungs
C. Diaphragm
D. Bronchi
Question 8
A diagram of the human kidney is shown below. What is the function of the renal pyramids?
A. To filter waste from the blood
B. To regulate blood pressure
C. To concentrate urine
D. To produce hormones
Question 9
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain cons\tant from generation to generation in the absence of other evolutionary influences. Which of the following is a necessary condition for the Hardy-Weinberg principle to hold?
A. Random mating
B. Genetic drift
C. Mutation
D. Genetic variation
Question 10
In the context of growth and development, what is the term for the process by which an organism grows and matures?
A. Growth
B. Development
C. Differentiation
D. Maturation
Question 11
A plant is grown in a controlled environment with a temperature of 25°C and a relative humidity of 60%. What is the expected rate of transpiration?
A. High
B. Medium
C. Low
D. Very Low
Question 12
A diagram of the human digestive system is shown below. What is the function of the pancreas?
A. Production of bile
B. Production of digestive enzymes
C. Absorption of nutrients
D. Storage of waste
Question 13
In the context of asexual reproduction, what is the primary advantage of budding in yeast?
A. Increased genetic diversity
B. Reduced energy exp\enditure
C. Improved survival rates
D. Enhanced reproductive efficiency
Question 14
A study on the genetic variation of a population found that the frequency of the dominant allele (A) is 0.6, while the frequency of the recessive allele (a) is 0.4. If the population size is 1000, what is the expected number of homozygous dominant individuals (AA)?
A. 320
B. 360
C. 400
D. 440
Question 15
A cell is placed in a solution with a concentration of 0.1 M glu\cose. The cell has a permeability coefficient of 1.5 x 10^-6 cm/s. What is the rate of glu\cose uptake by the cell?
A. 1.0 x 10^-3 M/s
B. 1.5 x 10^-3 M/s
C. 2.0 x 10^-3 M/s
D. 3.0 x 10^-3 M/s

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