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Post-UTME Biology 2008 Objective Past Questions

All 15 questions from the Post-UTME Screening (Post-UTME) Biology 2008 Objective paper, with the correct answer and a full explanation for each. Free, no signup needed.

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Biology 2008 Objective — Question 1

Which of the following infections is unlikely to respond to antibiotics treatment?

  • A. Tetanus
  • B. MeaslesCorrect
  • C. Typhoid fever
  • D. Ringworm

Explanation

Measles is viral; antibiotics are ineffective against viral infections.

Biology 2008 Objective — Question 2

Pest can be controlled without the subsequent danger of polluting the ecosystem by

  • A. Spraying the ecosystem with pesticide
  • B. Keeping the population of natural enemies constant
  • C. Increasing the population of natural enemies of the pestCorrect
  • D. Eliminating the natural enemies of the pests

Explanation

Biological control (boosting natural predators) avoids the pollution risk of chemical pesticides.

Biology 2008 Objective — Question 4

Which of the following bones is NOT a component of the appendicular skeleton?

  • A. Tibia
  • B. SacrumCorrect
  • C. Radius
  • D. Humerus

Explanation

The sacrum belongs to the axial skeleton, not the appendicular skeleton.

Biology 2008 Objective — Question 5

If two parents are sickle cell carriers, then their genotypes would be

  • A. HbA HbA and HbA HbA
  • B. HbA HbA and HbS HbS
  • C. HbA HbS and HbA HbSCorrect
  • D. HbS HbS and HbS HbS

Explanation

Sickle cell carriers are heterozygous, HbA HbS, for both parents.

Biology 2008 Objective — Question 6

Procaryotic cells are found in

  • A. MoneransCorrect
  • B. Algae
  • C. Tracheophytes
  • D. Spirogyra

Explanation

The kingdom Monera consists of prokaryotic organisms.

Biology 2008 Objective — Question 7

The correct order of classification of human being is

  • A. Animalia, Chordata, Vertebrata, Mammalia, Primate, Hominidae, Homo and SapiensCorrect
  • B. Animalia, Vertebrata, mammalia, chordata, Primate, Homo, sapiens and Hominidee
  • C. Chordata, Animalia, Vertebrata, Mammalia, Primate, Hominidae, Homo and sapiens
  • D. Animalia, Chordata, Vertebrate, Primate, mammalia, Homo and sapiens

Explanation

This is the standard taxonomic hierarchy for humans.

Biology 2008 Objective — Question 8

Deficiency of sulphur causes

  • A. Poor, weedy growth
  • B. Extremely stunted growth
  • C. Yellowing of leaves, stems become slenderCorrect
  • D. Weak, stunted growth

Explanation

Sulphur deficiency typically causes yellowing (chlorosis) and slender stems.

Biology 2008 Objective — Question 9

Vitamin K is important in the

  • A. Formation of enzymes involved in synthesis of amino acids
  • B. Formation of red blood cells
  • C. Synthesis of blood clotting factorsCorrect
  • D. Formation of co-enzymes involved in cellular respiration

Explanation

Vitamin K is essential for synthesizing blood clotting factors.

Biology 2008 Objective — Question 10

The following are the components of nucleotides except

  • A. A five-carbon sugar
  • B. A six-carbon sugarCorrect
  • C. A phosphate group
  • D. An organic nitrogen-containing base

Explanation

Nucleotides contain a five-carbon sugar, not a six-carbon sugar.

Biology 2008 Objective — Question 11

Which of the following inherited conditions usually shows incomplete dominance?

  • A. Baldness
  • B. Tongue rolling ability
  • C. Haemophilia
  • D. Sickle cell anaemiaCorrect

Explanation

Sickle cell trait shows incomplete dominance/codominance.

Biology 2008 Objective — Question 12

Which of the following is not a theory under Darwin's theory of organic evolution?

  • A. Over production
  • B. Struggle for existence
  • C. MutationCorrect
  • D. (option not fully legible)

Explanation

Mutation as a mechanism was formalized later, not part of Darwin's original theory.

Biology 2008 Objective — Question 13

Which of the following does not cause mutation?

  • A. X-rays
  • B. MutantCorrect
  • C. Ultra-violet light
  • D. Cosmic radiation

Explanation

A 'mutant' is the resulting organism, not a cause of mutation.

Biology 2008 Objective — Question 14

Which of the following organisms shows homodont dentition?

  • A. LizardCorrect
  • B. Sheep
  • C. Cat
  • D. Man

Explanation

Reptiles like lizards typically show homodont (uniform) dentition.

Biology 2008 Objective — Question 15

Which of the following habitats cannot be used for the study of succession?

  • A. A pond
  • B. Savanna grassland
  • C. Well cultivated landCorrect
  • D. Abandoned farm land

Explanation

Continuously cultivated land is regularly disturbed, preventing natural ecological succession.

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