POST UTME ACHIEVERS UNIVERSITY 2017 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A diagram of a cell membrane is shown below. Which of the following structures is responsible for the movement of molecules across the membrane?
A. Pore
B. Channel
C. Transporter
D. Receptor
Question 2
A diagram of the human circulatory system is shown below. What is the function of the coronary arteries?
A. Supplying oxygen to the heart muscle
B. Regulating blood pressure
C. Filtering blood
D. Producing red blood cells
Question 3
In a desert e\cosystem, what is the primary adaptation of cacti to conserve water?
A. Their waxy stems and leaves
B. Their ability to photosynthesize at night
C. Their deep roots to access groundwater
D. Their ability to store water in their stems
Question 4
In the context of evolutionary theory, what is the term for the process by which a species becomes adapted to its environment?
A. Natural selection
B. Genetic drift
C. Gene flow
D. Mutation
Question 5
The process by which plants convert light energy into chemical energy is known as
A. Respiration
B. Photosynthesis
C. Transpiration
D. Translocation
Question 6
A diagram of a bone cell is shown below. Which of the following structures is responsible for the formation of bone tissue?
A. Osteoblast
B. Osteoclast
C. Osteoid
D. Bone matrix
Question 7
In a human kidney, what is the primary function of the nephron's loop of Henle?
A. To reabsorb water and ions
B. To excrete waste products
C. To regulate the body's pH levels
D. To produce hormones
Question 8
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 breathing
Question 9
A 25-year-old woman presents with symptoms of hyperthyroidism. Which of the following hormones is most likely responsible for her condition?
A. Thyroid-stimulating hormone (TSH)
B. Triiodothyronine (T3)
C. Thyroxine (T4)
D. Thyrotropin-relea\sing hormone (TRH)
Question 10
In a human lung, what is the primary function of the alveoli?
A. To exchange oxygen and carbon dioxide
B. To regulate the body's temperature
C. To produce surfac\tant
D. To filter out dust particles
Question 11
A 2.5 L flask contains 0.5 M glu\cose solution. If 10 mL of 1 M HCl is added to the solution, what is the new concentration of glu\cose?
A. 0.45 M
B. 0.50 M
C. 0.55 M
D. 0.60 M
Question 12
A diagram of a muscle cell is shown below. Which of the following structures is responsible for the contraction of the muscle?
A. Myofibril
B. Sarcomere
C. Z-line
D. M-line
Question 13
A 40-year-old man presents with symptoms of hypertension. Which of the following organs is most likely affected?
A. Heart
B. Lungs
C. Kidneys
D. Liver
Question 14
In the xylem, what is the primary function of the tracheids?
A. Transport of water and minerals from roots to leaves
B. Transport of sugars and other organic compounds from leaves to roots
C. Storage of water and minerals in the xylem
D. Production of xylem sap
Question 15
The process by which an organism's genetic information is altered is known as
A. Mutation
B. Genetic Drift
C. Gene Flow
D. Natural Selection

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