Biology Exam Past Questions and Answers | JAMB, WAEC and NECO

Biology is the study of life and living things. It can be divided into different areas that look at the structure, function, anatomy, and behavior of organisms.

• Question 41: Which of the following reagent is used for testing the presence of protein in food? Options:
  A) Benedict solution
  B) Fetiling’s Solution
  C) Millon’s reagent
  D) Sudan III
  Show Answer
  The correct answer is C .
• Question 42: In typical predator food chain involving secondary and tertiary consumers, the organism become progressively Options:
  A) smaller and more numerous along the food chain
  B) equal in number and size along the food chain
  C) larger and fewer along the food chain
  D) parasitized along the food chain as consumers get bigger
  Show Answer
  The correct answer is C .
• Question 43: Which of the following food substance will produce a brick-red colour when warmed with Benedict's solution? Options:
  A) Glucose
  B) Starch
  C) Egg white
  D) Maltose
  Show Answer
  The correct answer is A .
• Question 44:

  

  Use the diagram above to answer this question.

  The experimental set-up above is used to demonstrate the process of

  Options:
  A) diffusion
  B) photosynthesis
  C) fermentation
  D) plasmolysis
  Show Answer
  The correct answer is C .
• Question 45: What proportion of the offspring of a cross between two heterozygous parents will exhibit the recessive condition phenotypically Options:
  A) 1/4
  B) 1/2
  C) 3/4
  D) 4/4
  Show Answer
  The correct answer is A .
• Question 46: The spots and stripes of the leopard and tiger are example of Options:
  A) cryptic colouration
  B) warning colouration
  C) disruptive colouration
  D) counter shading
  Show Answer
  The correct answer is C .
• Question 47:

  Which of the following is TRUE of the process of conjugation in Paramecium?

  Options:
  A) Micronucleus disintegrates
  B) Each ex-conjugant divides only once
  C) Macro nucleus undergoes division
  D) Each micronucleus divides twice
  Show Answer
  The correct answer is D .
• Question 48: If a DNA strand has a base sequence TCA, its complementary strand must be Options:
  A) ATG
  B) TAG
  C) GAT
  D) AGT
  Show Answer
  The correct answer is D .
• Question 49: Which group of plants would be the first colonizers in an ecological succession changing rocks to soil? Options:
  A) Mosses
  B) Ferns
  C) Lichens
  D) Grasses
  Show Answer
  The correct answer is C .
• Question 50: Denitrifying bacteria in nature liberate gaseous nitrogen directly from Options:
  A) ammonium salts
  B) soil nitrates
  C) thunderstorms
  D) soil nitrites
  E) plant and animal proteins
  Show Answer
  The correct answer is B .