MOLECULAR CELL BIOLOGY ACTUAL TEST
PAPER 2026 COMPLETE QUESTIONS AND
SOLUTIONS GRADED A+
◉ Disciplines that produced molecular cell biology. Answer:
microbiology, genetics, and biochemistry
◉ Characteristics of Molecular Cell Biology Answer: Reductionism,
Unity of life, extremely rapid change, multidisciplinary, and
genomics era
◉ Prokaryote vs Eukaryote Cells Answer: Prokaryote cells are
generally smaller, lack a nucleus, and have simpler structures, while
eukaryote cells are larger, have a defined nucleus, and contain
complex organelles.
◉ Prokaryote or Eukaryote? Answer: prokaryote
◉ Prokaryote or Eukaryote? Answer: Eukaryote
◉ Life Cycle of a Cell Answer: The four parts of the cell cycle are G1
(cell growth), S (DNA synthesis), G2 (preparation for mitosis), and M
,(mitosis). Checkpoints occur at G1, G2, and M phases to ensure
proper cell division.
◉ Key Proteins in Cell Cycle Control Answer: 1. Cyclins: proteins that
regulate the cell cycle progression. 2. Cyclin-dependent kinases
(CDKs): enzymes activated by cyclins to phosphorylate target
proteins. 3. p53: a tumor suppressor protein that regulates the cell
cycle and prevents genomic mutations.
◉ Common Model Organisms Answer: Four common model
organisms are: 1. Escherichia coli (bacteria), 2. Saccharomyces
cerevisiae (yeast), 3. Drosophila melanogaster (fruit fly), 4. Mus
musculus (mouse).
◉ Basic Macromolecules Answer: The four types of macromolecules
are: 1. Proteins (amino acids, enzymes, structure). 2. Nucleic acids
(nucleotides, genetic information). 3. Carbohydrates (sugars, energy
storage). 4. Lipids (fatty acids, membrane structure).
◉ Carbohydrates Subunits Answer: monosaccharides, disaccharides,
polysaccharides
◉ Carbohydrates Function Answer: Primary energy source and
structural support in plants
, ◉ carbohydrates structure Answer: carbon, hydrogen, oxygen
◉ Carbohydrates identification Answer: Carbon, hydrogen, and
oxygen with -OH (CH2OH)
◉ Lipids Subunit Answer: fats, oils, waxes, phospholipids, and
steroids
◉ Lipids Functions Answer: stores energy, forms cell membranes,
carries messages
◉ Lipids structure Answer: carbon and hydrogen chains, making
them hydrophobic
◉ lipids identification Answer: long hydrocarbon chains
◉ Proteins subunit Answer: amino acids
◉ protein functions Answer: enzyme catalysis, defense, transport,
support, motion, regulation, storage
◉ Protein structure Answer: long chains of amino acids
PAPER 2026 COMPLETE QUESTIONS AND
SOLUTIONS GRADED A+
◉ Disciplines that produced molecular cell biology. Answer:
microbiology, genetics, and biochemistry
◉ Characteristics of Molecular Cell Biology Answer: Reductionism,
Unity of life, extremely rapid change, multidisciplinary, and
genomics era
◉ Prokaryote vs Eukaryote Cells Answer: Prokaryote cells are
generally smaller, lack a nucleus, and have simpler structures, while
eukaryote cells are larger, have a defined nucleus, and contain
complex organelles.
◉ Prokaryote or Eukaryote? Answer: prokaryote
◉ Prokaryote or Eukaryote? Answer: Eukaryote
◉ Life Cycle of a Cell Answer: The four parts of the cell cycle are G1
(cell growth), S (DNA synthesis), G2 (preparation for mitosis), and M
,(mitosis). Checkpoints occur at G1, G2, and M phases to ensure
proper cell division.
◉ Key Proteins in Cell Cycle Control Answer: 1. Cyclins: proteins that
regulate the cell cycle progression. 2. Cyclin-dependent kinases
(CDKs): enzymes activated by cyclins to phosphorylate target
proteins. 3. p53: a tumor suppressor protein that regulates the cell
cycle and prevents genomic mutations.
◉ Common Model Organisms Answer: Four common model
organisms are: 1. Escherichia coli (bacteria), 2. Saccharomyces
cerevisiae (yeast), 3. Drosophila melanogaster (fruit fly), 4. Mus
musculus (mouse).
◉ Basic Macromolecules Answer: The four types of macromolecules
are: 1. Proteins (amino acids, enzymes, structure). 2. Nucleic acids
(nucleotides, genetic information). 3. Carbohydrates (sugars, energy
storage). 4. Lipids (fatty acids, membrane structure).
◉ Carbohydrates Subunits Answer: monosaccharides, disaccharides,
polysaccharides
◉ Carbohydrates Function Answer: Primary energy source and
structural support in plants
, ◉ carbohydrates structure Answer: carbon, hydrogen, oxygen
◉ Carbohydrates identification Answer: Carbon, hydrogen, and
oxygen with -OH (CH2OH)
◉ Lipids Subunit Answer: fats, oils, waxes, phospholipids, and
steroids
◉ Lipids Functions Answer: stores energy, forms cell membranes,
carries messages
◉ Lipids structure Answer: carbon and hydrogen chains, making
them hydrophobic
◉ lipids identification Answer: long hydrocarbon chains
◉ Proteins subunit Answer: amino acids
◉ protein functions Answer: enzyme catalysis, defense, transport,
support, motion, regulation, storage
◉ Protein structure Answer: long chains of amino acids
