BIO 152 EXAM 2 WITH CORRECT
ANSWERS 2025
Cell Theory correct answers >> Idea that: 1. all living things
are composed of cells,
2. cells are the smallest unit of life, and
3. new cells are produced from existing cells
Prokaryotic cell correct answers >> A type of cell lacking a
nucleus and membrane-bound organelles; found only in the
domains Bacteria and Archaea. (Much smaller than eukaryotic
cells)
Eukaryotic cells correct answers >> Multicellular, larger,
complex, with nucleus, membrane bound organelles, DNA tightly
wrapped around histone proteins in chromosomes, cellulose in
plant cell walls.
Membrane-bound organelles differentiate eukaryotic and
prokaryotic cells.
Bacteria correct answers >> Single-celled organism
Doesn't have nucleus or DNA packaged w/ histone proteins
Has circular chromosomes and simple RNA polymerase
Archaea correct answers >> Single-celled, no nucleus
Has circular chromosomes and DNA packaged w/ histone proteins
Complex RNA Polymerase (more closely related to eukarya than
bacteria).
,Eukarya correct answers >> Has nucleus and DNA packaged
w/ histone proteins
Doesn't have circular chromosomes
Complex DNA polymerase
Members include plants, animals, fungi and protists.
Nitrogen Fixation (Plants & Bacteria) correct answers >> 1.
Plant secretes bacteria-attracting compound
2. Bacteria enters the plants roots
3. The plant delivers sugars to the bacteria
4. Bacteria produce and releases a unit of usable nitrogen into the
plant
5. The plant distributes and absorbs the nitrogen.
Lateral Gene Transfer (LGT) correct answers >> The transfer
of genetic material of prokaryotic cells within a generation
(horizontally).
Transformation correct answers >> LGT where dead
bacterium enters living bacterium & is exchanged for a piece of
DNA (no physical contact).
Transduction correct answers >> LGT that is virus mediated
Conjugation correct answers >> LGT where DNA is
transferred through bridge that is formed between cells (physical
contact).
, Amoebozoa correct answers >> Cells lack walls and have
large lobes for moving (amoebae & slime molds).
Ophisthokonta correct answers >> Single flagellum, no
secondary endosymbiosis (fungi & animals).
Excavata correct answers >> Has feeding grove and lost
mitochondria (trepanomes- sleep and water-born illnesses).
Plantae correct answers >> Double membrane on
chloroplaste (red algae & green plants).
Rhizaria correct answers >> Cells lack walls, slender
projection for eating (Foraminifera - marine fossils).
Alvolata correct answers >> Flattened vesicles inside cell (P.
Falciparum causing malaria).
Stramenopila correct answers >> Two hairy flagella during
motile stage (brown algae and diatoms).
Protists correct answers >> Eukaryotic organism excluding
plants, animals, and fungi.
Larger eukaryotic cells possible because... correct answers >>
1. Membrane-bound organelles
2. Cytoskeleton providing structural support
ANSWERS 2025
Cell Theory correct answers >> Idea that: 1. all living things
are composed of cells,
2. cells are the smallest unit of life, and
3. new cells are produced from existing cells
Prokaryotic cell correct answers >> A type of cell lacking a
nucleus and membrane-bound organelles; found only in the
domains Bacteria and Archaea. (Much smaller than eukaryotic
cells)
Eukaryotic cells correct answers >> Multicellular, larger,
complex, with nucleus, membrane bound organelles, DNA tightly
wrapped around histone proteins in chromosomes, cellulose in
plant cell walls.
Membrane-bound organelles differentiate eukaryotic and
prokaryotic cells.
Bacteria correct answers >> Single-celled organism
Doesn't have nucleus or DNA packaged w/ histone proteins
Has circular chromosomes and simple RNA polymerase
Archaea correct answers >> Single-celled, no nucleus
Has circular chromosomes and DNA packaged w/ histone proteins
Complex RNA Polymerase (more closely related to eukarya than
bacteria).
,Eukarya correct answers >> Has nucleus and DNA packaged
w/ histone proteins
Doesn't have circular chromosomes
Complex DNA polymerase
Members include plants, animals, fungi and protists.
Nitrogen Fixation (Plants & Bacteria) correct answers >> 1.
Plant secretes bacteria-attracting compound
2. Bacteria enters the plants roots
3. The plant delivers sugars to the bacteria
4. Bacteria produce and releases a unit of usable nitrogen into the
plant
5. The plant distributes and absorbs the nitrogen.
Lateral Gene Transfer (LGT) correct answers >> The transfer
of genetic material of prokaryotic cells within a generation
(horizontally).
Transformation correct answers >> LGT where dead
bacterium enters living bacterium & is exchanged for a piece of
DNA (no physical contact).
Transduction correct answers >> LGT that is virus mediated
Conjugation correct answers >> LGT where DNA is
transferred through bridge that is formed between cells (physical
contact).
, Amoebozoa correct answers >> Cells lack walls and have
large lobes for moving (amoebae & slime molds).
Ophisthokonta correct answers >> Single flagellum, no
secondary endosymbiosis (fungi & animals).
Excavata correct answers >> Has feeding grove and lost
mitochondria (trepanomes- sleep and water-born illnesses).
Plantae correct answers >> Double membrane on
chloroplaste (red algae & green plants).
Rhizaria correct answers >> Cells lack walls, slender
projection for eating (Foraminifera - marine fossils).
Alvolata correct answers >> Flattened vesicles inside cell (P.
Falciparum causing malaria).
Stramenopila correct answers >> Two hairy flagella during
motile stage (brown algae and diatoms).
Protists correct answers >> Eukaryotic organism excluding
plants, animals, and fungi.
Larger eukaryotic cells possible because... correct answers >>
1. Membrane-bound organelles
2. Cytoskeleton providing structural support
