Practice Post UTME RSU biology 2018 Past Questions

Question 1

A researcher is studying the effect of temperature on the growth rate of E. coli. She measures the growth rate at different temperatures and plots the data on a graph. Which of the following types of graphs would best represent the relationship between temperature and growth rate?

A. linear

B. exponential

C. \logarithmic

D. inverse

Question 2

A 5.0-g sample of a compound with the formula C4H10 is burned in a combustion reaction. If 11.2 L of CO2 gas is produced at STP, what is the empirical formula of the compound?

A. C2H5

B. C3H7

C. C4H8

D. C5H10

Question 3

A researcher is studying the effect of pH on the growth of E. coli. The graph below shows the growth of E. coli at different pH levels. What is the pH level at which the growth of E. coli is maximum?

A. 6.5

B. 7.5

C. 8.5

D. 9.5

Question 4

In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?

A. 0.36

B. 0.64

C. 0.72

D. 0.84

Question 5

A plant has a root system that consists of a taproot and a lateral root system. The taproot is 10 cm long and the lateral roots are 5 cm long. If the plant is placed in a solution with a concentration of 0.1 M sucrose, what is the rate of sucrose uptake by the lateral roots?

A. 0.5 mmol/s

B. 1.0 mmol/s

C. 1.5 mmol/s

D. 2.0 mmol/s

Question 6

In a population of Drosophila melanogaster, the frequency of the recessive allele 'a' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'AA'?

A. 0.64

B. 0.36

C. 0.16

D. 0.04

Question 7

In the context of evolutionary theories, what is the primary mechanism driving the process of speciation?

A. Natural selection

B. Genetic drift

C. Gene flow

D. Mutation

Question 8

A person is experiencing respiratory distress due to a severe asthma attack. Which of the following is a primary function of the alveoli in the lungs?

A. Gas exchange

B. Filtering of blood

C. Production of surfac\tant

D. Regulation of pH

Question 9

In a random sample of 1000 people, 250 are left-handed. What is the probability of randomly selecting a left-handed person?

A. 0.25

B. 0.3

C. 0.35

D. 0.4

Question 10

A diagram of the human circulatory system is shown below. Which of the following is the correct sequence of blood flow from the heart to the lungs?

A. Right atrium → pulmonary artery → lungs → pulmonary vein → left atrium

B. Right atrium → pulmonary vein → lungs → pulmonary artery → left atrium

C. Left atrium → pulmonary vein → lungs → pulmonary artery → right atrium

D. Left atrium → pulmonary artery → lungs → pulmonary vein → right atrium

Question 11

A cell is in the process of mitosis. Which of the following is a characteristic of the prophase stage?

A. Condensation of chromosomes

B. Separation of chromosomes

C. Formation of the spindle fibers

D. Division of the cytoplasm

Question 12

In the human body, what is the primary function of the xylem in the vascular system?

A. To transport water and minerals from the roots to the leaves

B. To transport glu\cose and amino acids from the leaves to the roots

C. To provide structural support to the plant

D. To regulate the plant's water potential

Question 13

A patient has a fever of 38.5°C. If the normal body temperature is 37°C, what is the percentage increase in body temperature?

A. 2%

B. 4%

C. 6%

D. 8%

Question 14

A 50 mL solution of 0.5 M HCl is added to 100 mL of 0.2 M NaOH. What is the concentration of the resulting solution?

A. 0.1 M

B. 0.2 M

C. 0.3 M

D. 0.4 M

Question 15

In a population of 1000 individuals, 60% are heterozygous for the ABO blood group system. If 20% of the population is type A, 40% is type B, and 40% is type AB, what is the genotype of the individual who is type AB?

A. IAi

B. IBi

C. IAIB

D. IAiB

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