passwella.
Menu

Unilorin Post-UTME Biology 2024 (Model questions) past questions and answers

10 questions. Try each one, then open the answer to check yourself and read the explanation.

Question 1

Cell Division

In the process of mitosis, chromosomes line up at the equator during:

  1. A.Prophase
  2. B.Telophase
  3. C.Anaphase
  4. D.Metaphase
Show the answer and explanation

Answer: D (Metaphase)

Explanation

In metaphase the chromosomes line up across the middle (equator) of the spindle before the chromatids are pulled apart in anaphase.

Open this question

Question 2

Cell Structure and Organisation

Which of the following best describes the role of ribosomes in the cell?

  1. A.Protein Synthesis
  2. B.Energy Production
  3. C.Lipid metabolism
  4. D.storage of genetic material
Show the answer and explanation

Answer: A (Protein Synthesis)

Explanation

Ribosomes read messenger RNA and join amino acids into proteins. Energy production happens in mitochondria and DNA is stored in the nucleus.

Open this question

Question 3

Mendelian Inheritance

The law of independent assortment states that

  1. A.genes for different traits are inherited together
  2. B.genes for different traits are inherited independently of each other
  3. C.homologous chromosomes do not separate during meiosis
  4. D.the dominant allele always masks the recessive allele
Show the answer and explanation

Answer: B (genes for different traits are inherited independently of each other)

Explanation

Mendel's second law says alleles of different genes separate into gametes independently, so one trait does not affect how another is inherited.

Open this question

Question 4

Photosynthesis and Plant Nutrition

The primary role of chlorophyll in photosynthesis is to

  1. A.split water molecules
  2. B.produce glucose
  3. C.absorb light energy
  4. D.fix carbon dioxide
Show the answer and explanation

Answer: C (absorb light energy)

Explanation

Chlorophyll is the green pigment that traps light energy; that energy then drives the splitting of water and the making of glucose.

Open this question

Question 5

Chromosomes, DNA and Sex Linkage

The process by which RNA is synthesized from a DNA template is called

  1. A.translation
  2. B.replication
  3. C.transcription
  4. D.reverse transcription
Show the answer and explanation

Answer: C (transcription)

Explanation

Copying DNA into RNA is transcription. Translation makes protein from RNA, and replication copies DNA into DNA.

Open this question

Question 6

Transport in Animals

Which of the following is false?

  1. A.the heart pumps oxygenated blood to the body through the left ventricle
  2. B.the right atrium receives deoxygenated blood from the blood from the body
  3. C.the pulmonary artery carries oxygenated blood to the lungs
  4. D.the veins return deoxygenated blood to the heart
Show the answer and explanation

Answer: C (the pulmonary artery carries oxygenated blood to the lungs)

Explanation

The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs, so statement C is false.

Open this question

Question 7

Transport in Animals

Which of the following has an open circulatory system?

  1. A.Human
  2. B.Goat
  3. C.Grasshopper
  4. D.Frog
Show the answer and explanation

Answer: C (Grasshopper)

Explanation

Insects such as the grasshopper have an open system where blood bathes the organs in a body cavity. Vertebrates like humans, goats and frogs have closed systems.

Open this question

Question 8

Ecological Associations

Which of the following is an examples of mutualism?

  1. A.a tick feeding on a dog's blood
  2. B.A bee pollinating a flower
  3. C.a lion hunting a zebra
  4. D.a remora fish attaching to a shark
Show the answer and explanation

Answer: B (A bee pollinating a flower)

Explanation

In mutualism both partners gain: the bee gets nectar and the flower is pollinated. The tick is a parasite, the lion a predator, and the remora a commensal.

Open this question

Question 9

Support and Movement

The human skeletal system consists of how many bones in total?

  1. A.106
  2. B.196
  3. C.206
  4. D.216
Show the answer and explanation

Answer: C (206)

Explanation

An adult human skeleton has 206 bones.

Open this question

Question 10

Excretion

The function of the liver in detoxification involves

  1. A.breaking down red blood cells
  2. B.storing excess glucose as glycogen
  3. C.removing toxins from the blood
  4. D.synthesizing enzymes for digestion
Show the answer and explanation

Answer: C (removing toxins from the blood)

Explanation

Detoxification means making harmful substances such as drugs, alcohol and ammonia harmless, which the liver does by removing them from the blood.

Open this question