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 1631: 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 1632: The largest amount of yolk is found in the egg of Options:
  A) amphibians
  B) pisces
  C) repitles
  D) aves
  Show Answer
  The correct answer is D .
• Question 1633: If a farmer left his land uncultivated for five years before returning to it, he must be practising Options:
  A) modern agriculture
  B) strip cropping
  C) contour ridging
  D) crop rotation
  E) the bush fallow system
  Show Answer
  The correct answer is E .
• Question 1634: During respiration, air circulates round plant tissues via the Options:
  A) lenticels
  B) stomata
  C) guard cells
  D) intercellular spaces
  Show Answer
  The correct answer is D .
• Question 1635:
  

  The structure labelled 5 is used for

  Options:
  A) protein synthesis
  B) energy production
  C) secretion
  D) excretion
  Show Answer
  The correct answer is C .
• Question 1636: In million's test, when the reagent is added to a protein food item, a white precipitate is produced which turns Options:
  A) blue on heating
  B) yellow on heating
  C) green on heating
  D) red on heating
  Show Answer
  The correct answer is D .
• Question 1637: Which of these products obtained from analyzing sweat from skin is not an excretory product? Options:
  A) water
  B) Salts
  C) Dust
  D) Urea
  E) Urates
  Show Answer
  The correct answer is C .
• Question 1638:

  The membrane around the vacuole is known as

  Options:
  A) Elaioplast
  B) Amyloplast
  C) Tonoplast
  D) Cytoplast
  Show Answer
  The correct answer is C .
• Question 1639: The process of transforming the chemical energy of cellular fuels into the high energy bonds of ATP in plants is Options:
  A) autotrophism
  B) photosysnthesis
  C) photolysis
  D) respiration
  Show Answer
  The correct answer is D .
• Question 1640: The excretory organ in insects is the Options:
  A) kidney
  B) malpighian tubule
  C) flame cell
  D) nephridium
  Show Answer
  The correct answer is B .