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 151:

  If a DNA strand has a base sequence TCA, its complementary strand mustbe?

  Options:
  A) ATG
  B) TAG
  C) GAT
  D) AGT
  Show Answer
  The correct answer is D .
• Question 152: Which scenario would cause a covalent bond to form? Options:
  A) Two atoms share electrons so they can fill their outer shells
  B) The constant motion of electrons and the creation of charge imbalances bonds two molecules together
  C) A hydrogen atom with a slight positive charge is attracted to a negative charge of another molecule or atom
  D) One atom loses one or more electrons and the other atom gains one or more electrons
  Show Answer
  The correct answer is A .
• Question 153: Both recessive and dominant characters are found Options:
  A) on different chromosomes in the cell
  B) at the same locus of a homologous chromosome
  C) at different loci of a homologous chromosome
  D) on the same chromatid in a chromosome
  Show Answer
  The correct answer is B .
• Question 154: If a tall man (TT) maries a dwarf woman (gg) and they have four male children, the offspring will be Options:
  A) All short
  B) Three short and one tall
  C) Two short and two tall
  D) One short and three tall
  E) All tall
  Show Answer
  The correct answer is E .
• Question 155: Food chain refers to the feeding relationships between animals in a ______? Options:
  A) Family
  B) phylum
  C) community
  D) group
  Show Answer
  The correct answer is C .
• Question 156: Sclerenchyma cells are lignified to Options:
  A) strengthen and support the plant
  B) transport synthesized food
  C) conduct water and salt
  D) protect the plant from injury
  Show Answer
  The correct answer is A .
• Question 157: If a person is bitten by a snake on the leg, it is advisable for him to Options:
  A) keep moving so that the venom will ooze out with bleeding
  B) Wash the wound with water containing antiseptic
  C) bandage the wound so that germs do not get in through it
  D) Keep still and apply a tourniquet above the wound
  Show Answer
  The correct answer is D .
• Question 158: An amoeba and an unlaid chicken egg are Options:
  A) anial tissue
  B) organelles
  C) single cell
  D) organisms
  Show Answer
  The correct answer is C .
• Question 159: In which of the following species is the biomass of an individual the smallest ? Options:
  A) Agama sp
  B) Bufo sp
  C) Spirogyra sp
  D) Tilapia sp
  Show Answer
  The correct answer is C .
• Question 160: People wit sickle-cell anaemia have haemoglobin Options:
  A) S and are homozygous recessive
  B) A and are heterozygous recessive
  C) S and are heterozygous recessive
  D) A and are homozygous recessive
  Show Answer
  The correct answer is A .