POST UTME UNN 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant with the genotype 'Tt' is crossed with a plant with the genotype 'tt'. What is the probability that the offspring will have the genotype 'TT'?
A. 0.25
B. 0.5
C. 0.75
D. 0.9
Question 2
A patient is diagnosed with chronic obstructive pulmonary disease (COPD). The patient's lung function tests show a forced expiratory volume (FEV1) of 1.2 L and a forced vital capacity (FVC) of 3.5 L. What is the patient's FEV1/FVC ratio?
A. 0.34
B. 0.50
C. 0.67
D. 0.80
Question 3
In a population of 1000 bacteria, 80% are susceptible to a particular antibiotic. If 200 bacteria are exposed to the antibiotic, what is the expected number of resis\tant bacteria?
A. 160
B. 240
C. 320
D. 400
Question 4
A population of 1000 individuals has a mean height of 170 cm and a s\tandard deviation of 10 cm. If a new individual is added to the population with a height of 180 cm, what is the new mean height?
A. 169.5
B. 170
C. 170.5
D. 171
Question 5
A microorganism is isolated from a patient's blood culture. The microorganism is a gram-positive, catalase-negative, and oxidase-negative rod. What is the most likely identification of the microorganism?
A. Staphylococcus aureus
B. Streptococcus pneumoniae
C. Bacillus subtilis
D. Clostridium difficile
Question 6
In a forest e\cosystem, the primary producers are plants that undergo photosynthesis to produce glu\cose and oxygen. Which of the following is a byproduct of the light-dep\endent reactions in photosynthesis?
A. ATP
B. NADPH
C. Oxygen
D. Glu\cose
Question 7
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. 0.16
B. 0.32
C. 0.36
D. 0.64
Question 8
In a population of 100 individuals, the frequency of the dominant allele is 0.6 and the frequency of the recessive allele is 0.4. What is the expected frequency of the homozygous recessive genotype?
A. 0.16
B. 0.24
C. 0.32
D. 0.4
Question 9
A solution of sodium hydroxide (NaOH) is placed in a beaker and left to s\tand for several days. What is the expected outcome?
A. The sodium hydroxide will decompose into sodium and oxygen.
B. The sodium hydroxide will react with the air to form a brown precipitate.
C. The sodium hydroxide will remain unchanged.
D. The sodium hydroxide will dissolve in the beaker.
Question 10
In a population of Drosophila melanogaster, the frequency of the recessive allele 'b' is 0.2. If the population is in Hardy-Weinberg equilibrium, what is the frequency of the homozygous dominant genotype 'BB'?
A. 0.36
B. 0.64
C. 0.72
D. 0.84
Question 11
The diagram below shows a titration setup. If 25 cm^3 of 0.1 M NaOH is required to neutralize 25 cm^3 of HCl, what is the concentration of the HCl solution?
A. 0.05 M
B. 0.1 M
C. 0.2 M
D. 0.5 M
Question 12
The classification of living things is based on the following characteristics. Which of the following is a characteristic of the domain Archaea?
A. Cell wall
B. Chloroplasts
C. No true nucleus
D. Mitochondria
Question 13
A 2.5-metre tall man is s\tanding 15 metres away from a 5-metre tall lamppost. How far is the top of the lamppost from the man's eye level?
A. 1.5
B. 2.5
C. 3.5
D. 4.5
Question 14
A diagram of the human eye is shown below. Which of the following is a function of the retina?
A. Focu\sing light onto the retina
B. Detecting light and converting it into electrical signals
C. Regulating the amount of light that enters the eye
D. Supporting the eye's structure
Question 15
A species of bird has a beak length of 5 cm. If the beak length is normally distributed with a mean of 6 cm and a s\tandard deviation of 1 cm, what is the probability that a randomly selected bird will have a beak length greater than 7 cm?
A. 0.25
B. 0.50
C. 0.75
D. 0.90

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: