Biology - Grade 12 -2022 G.C

Grade 12 students can now access their exam results by visiting the Educational Assessment and Examination Services (EAES) website.


86. The following table compares prokaryotes and eukaryotes.
FeatureProkaryotesEukaryotes
DNAXLinear
MitochondriaAbsentY
RibosomesPresent (70S)Z
Cell membranePresentPresent
In the above table, X, Y, and Z can be respectively stated as

  1. Linear, present, present (70S)
  2. Circular, present, present (70S)
  3. Linear, present, present (80S)
  4. Circular, present, present (80S)


87. Which one of the following is NOT the function of the plasma membrane in eukaryotic cells?

  1. Isolating the cell from the external environment
  2. Transferring chemical energy from carbohydrates to ATP
  3. Responding to external signals
  4. Exchanging materials and information


88. Which one of the following is correct with respect to the structural components of the plasma membrane?

  1. Integral proteins are found inserted in the lipid bilayer.
  2. Peripheral proteins are located outside the lipid bilayer.
  3. Channel proteins cover the outer layer of the lipid bilayer.
  4. Glycoproteins are found on the cytoplasmic side of the cell membrane.


94. Why Drosophila melanogaster are considered ideal for genetic experiments? Because they

  1. contain chromosomes with several genes.
  2. have the highest number of chromosomes.
  3. breed and keep in large numbers easily.
  4. complete their life cycle within one month.


95. Which one of the following statements best describes the mechanisms by which meiosis brings about variation? Variation in meiosis is because of

  1. independent assortment and crossing over.
  2. frequent spontaneous mutations.
  3. variations in the content of the cytoplasm between the cells.
  4. reduction division that leads to haploid cell formation.


We have provided these questions from previous years grade 12 Ethiopian Secondary School Leaving Certificate Examination (ESSLCE) exams with the sole purpose of assisting students in their studies and preparations for upcoming exams. Please be aware that these questions are not indicative of future exam content. Good luck with your studies!

Connect with us!

MetaAppz Facebook Page MetaAppz Twitter Page MetaAppz Pinterest Page MetaAppz Youtube Page