POST UTME LAUTECH 2021 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A cell is placed in a solution with a concentration of 0.1 M NaCl. If the cell membrane is selectively permeable to Na+ ions, what will happen to the cell?
A. The cell will swell and eventually burst.
B. The cell will shrink and eventually die.
C. The cell will remain unchanged.
D. The cell will increase in size.
Question 2
In a typical human cell, the process of glycolysis occurs in the
A. Mitochondria
B. Endoplasmic Reticulum
C. Lysosomes
D. Cytoplasm
Question 3
In the context of sense organs, what is the primary function of the olfactory epithelium?
A. Detection of light
B. Detection of sound
C. Detection of smell
D. Detection of touch
Question 4
A patient is diagnosed with a bacterial infection. Which of the following antibiotics is most likely to be effective against this type of infection?
A. Penicillin
B. Erythromycin
C. Ciprofloxacin
D. Vancomycin
Question 5
A 30-year-old female presents with a 2-year history of amenorrhea. Her medical history includes a previous diagnosis of polycystic ovary syndrome (PCOS). Which of the following is the most likely underlying cause of her amenorrhea?
A. Hypothyroidism
B. Hyperprolactinemia
C. PCOS
D. Premature ovarian failure
Question 6
A researcher is studying the effect of temperature on the growth of bacteria. The graph below shows the relationship between temperature and growth rate.
A. The growth rate is highest at 30°C.
B. The growth rate is highest at 40°C.
C. The growth rate is highest at 50°C.
D. The growth rate is highest at 60°C.
Question 7
A population of bacteria is growing exponentially. If the initial population is 100 bacteria and the population doubles every 2 hours, what will be the population after 6 hours?
A. 1000
B. 2000
C. 4000
D. 8000
Question 8
A 50 mL sample of blood is drawn from a patient and centrifuged. The resulting plasma has a pH of 7.4. What is the concentration of H+ ions in the plasma?
A. 10^-7 M
B. 10^-8 M
C. 10^-9 M
D. 10^-10 M
Question 9
The classification of living things is based on
A. Cell structure
B. Morpho\logy
C. Metabolism
D. Evolutionary relationships
Question 10
A diagram of a plant cell is shown below. Identify the part labeled 'A'.
A. Nucleus
B. Mitochondria
C. Chloroplast
D. Vacuole
Question 11
A cell is placed in a solution with a concentration of 0.1 M glu\cose. If the cell is permeable to glu\cose, what is the concentration of glu\cose inside the cell after 10 minutes?
A. 0.001 M
B. 0.01 M
C. 0.05 M
D. 0.1 M
Question 12
A diagram of the xylem tissue in a plant is shown below. What is the primary function of the tracheids in this tissue?
A. Transport of water and minerals
B. Storage of nutrients
C. Support of the plant
D. Protection from pathogens
Question 13
The diagram below shows a cross-section of the human eye. Which part of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 14
A researcher is studying the effect of pH on the growth of E. coli. The graph below shows the relationship between pH and growth rate.
A. The growth rate is highest at pH 7.
B. The growth rate is highest at pH 5.
C. The growth rate is highest at pH 9.
D. The growth rate is highest at pH 3.
Question 15
A plant cell has a vacuole that contains 0.5 M sucrose. If the cell membrane is permeable to sucrose, what is the concentration of sucrose in the cytosol?
A. 0.2 M
B. 0.3 M
C. 0.4 M
D. 0.5 M

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