Practice post utme abu biology 2023 Past Questions

Question 1

A plant cell is placed in a solution containing 0.1 M glu\cose. If the cell membrane is permeable to glu\cose, what will happen to the concentration of glu\cose inside the cell?

A. The concentration of glu\cose will increase

B. The concentration of glu\cose will decrease

C. The concentration of glu\cose will remain the same

D. The concentration of glu\cose will increase and then decrease

Question 2

A plant grows in a nutrient-poor soil. Which of the following adaptations would be most beneficial for the plant?

A. Deep roots to access water

B. Large leaves to increase photosynthesis

C. Small leaves to reduce transpiration

D. Thick cuticle to prevent water loss

Question 3

In the context of osmoregulation, what is the primary function of the kidneys in a marine-dwelling organism?

A. To conserve water by reabsorbing it from the filtrate

B. To excrete excess salt by producing a highly concentrated urine

C. To regulate electrolyte balance by adjusting the amount of ions in the urine

D. To maintain acid-base balance by adjusting the pH of the urine

Question 4

A researcher is studying the effect of pH on the growth of a certain microorganism. The researcher measures the growth rate of the microorganism at different pH levels and plots the data on a graph. If the graph shows a sigmoidal curve, what is the most likely explanation for the shape of the curve?

A. The microorganism is adapting to the changing pH levels.

B. The microorganism is experiencing a lag phase.

C. The microorganism is experiencing a stationary phase.

D. The microorganism is experiencing a decline phase.

Question 5

Asexual reproduction in plants can occur through the production of

A. Seeds

B. Spores

C. Buds

D. Rhizomes

Question 6

In a human body, the epithelial tissue is primarily responsible for forming the lining of the respiratory, gastrointestinal, and genitourinary tracts. Which of the following types of epithelial tissue is most likely to be found in the lining of the respiratory tract?

A. Simple Cuboidal Epithelium

B. Stratified Squamous Epithelium

C. Pseudostratified Columnar Epithelium

D. Simple Columnar Epithelium

Question 7

The process of excretion in animals involves the removal of waste products from the body through the

A. Skin

B. Lungs

C. Kidneys

D. Liver

Question 8

A 0.5 M solution of NaCl is prepared by dissolving 25 g of NaCl in 100 mL of water. What is the concentration of Cl- ions in the solution?

A. 0.1 M

B. 0.2 M

C. 0.3 M

D. 0.4 M

Question 9

A diagram of a plant cell is shown below. What is the function of the structure labeled 'X'?

A. To store water and nutrients

B. To produce ATP through cellular respiration

C. To synthesize proteins

D. To regulate the cell's pH

Question 10

A researcher is studying the effect of pH on the growth of a certain microorganism. The researcher measures the growth rate of the microorganism at different pH levels and plots the data on a graph. If the graph shows a sigmoidal curve, what is the most likely explanation for the shape of the curve?

A. The microorganism is adapting to the changing pH levels.

B. The microorganism is experiencing a lag phase.

C. The microorganism is experiencing a stationary phase.

D. The microorganism is experiencing a decline phase.

Question 11

A diagram of the human reproductive system is shown below. What is the function of the part labeled 'A'?

A. To produce eggs for fertilization

B. To produce sperm for fertilization

C. To regulate the menstrual cycle by adjusting the amount of hormones produced

D. To maintain the structural integrity of the reproductive system by providing support to the cells

Question 12

The Hardy-Weinberg principle states that allele 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. Large population size

C. No mutation

D. No gene flow

Question 13

A diagram of the human brain is shown below. Which of the following structures is responsible for controlling voluntary movements?

A. Cerebrum

B. Cerebellum

C. Brainstem

D. Spinal Cord

Question 14

A diagram of a plant cell is shown below. What is the function of the structure labeled 'A'?

A. To synthesize proteins

B. To store genetic information

C. To regulate cell growth

D. To transport materials across the cell membrane

Question 15

A diagram of a human digestive system is shown below. What is the primary function of the structure labeled 'Z'?

A. To break down carbohydrates into simple sugars

B. To produce digestive enzymes

C. To regulate the body's pH

D. To absorb nutrients into the bloodstream

POST UTME ABU 2023 Biology | Objective

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