NATS 1670 CERTIFICATION EVALUATION
ACTUAL TEST FULL SOLUTION 2026
GUARANTEED TO PASS.
⫸ Why is the plasma membrane considered a stable barrier Answer:
plasma membrane forms a stable barrier between two polar
compartments
- because the interior of the phospholipid bilayer is occupied by the
hydrophobic fatty acid chains, the membrane in impermeable to H2O
⫸ Why is the plasma membrane a flexible barrier Answer: bilayers
of naturally occurring phospholipids are flexible jelly-like fluids, not
solids
⫸ What is an organelle Answer: provide compartments in which
specific cellular activity occurs
⫸ What is a vesicle Answer: - pocket made out of membrane that is
separated from the cytoplasm of a cell
- a carrier molecule in and out of the cells without crossing the
membrane
- penetration by fusion
⫸ What is a Lysosome Answer: - the garbage disposal system
- breaks down molecules into their base components using strong
digestive enzymes
,⫸ What is the Mitochondria Answer: - the power house of the cell
- generate most of the useful chemical energy derived from the
breakdown of lipids and carbohydrates
⫸ How many layers does the mitochondria have Answer: Two
1) Inner
- strictly regulates types of molecules that can pass through
2) Outer
Smoother, small molecules can pass through
⫸ How did the mitochondria originate Answer: when a bacteria cell
was consumed
⫸ What is the Nucleus Answer: - the largest orgenelle
- contains DNA and RNA and proteins
⫸ What does all cellular life have in common Answer: 1) Cell
Membrane
2) Regulates the flow of nutrients and waste
3) contains DNA
4) Several varieties of RNA
5) Proteins make and use most proteins and enzymes
6) Composed of the same basic Chemicals
, 7) Reproduce
8) require a supply of energy
⫸ List the cell sizes from smallest to largest Answer: viruses
bacteria
yeast
animal cells
multi-cellular organisms
⫸ What are the three different shapes of cells Answer: Rod-like ->
bacillus
Spherical -> coccus
Spiral -> spirillum
⫸ What are the conditions for cellular life Answer: - temperature
- PH
- Water
- Salt
- Oxygen availability
- Nutrient availability
⫸ What are the three temperatures Answer: Psychropiles -> grow
best below 20C
Mesophiles -> grows best between 20-50C
ACTUAL TEST FULL SOLUTION 2026
GUARANTEED TO PASS.
⫸ Why is the plasma membrane considered a stable barrier Answer:
plasma membrane forms a stable barrier between two polar
compartments
- because the interior of the phospholipid bilayer is occupied by the
hydrophobic fatty acid chains, the membrane in impermeable to H2O
⫸ Why is the plasma membrane a flexible barrier Answer: bilayers
of naturally occurring phospholipids are flexible jelly-like fluids, not
solids
⫸ What is an organelle Answer: provide compartments in which
specific cellular activity occurs
⫸ What is a vesicle Answer: - pocket made out of membrane that is
separated from the cytoplasm of a cell
- a carrier molecule in and out of the cells without crossing the
membrane
- penetration by fusion
⫸ What is a Lysosome Answer: - the garbage disposal system
- breaks down molecules into their base components using strong
digestive enzymes
,⫸ What is the Mitochondria Answer: - the power house of the cell
- generate most of the useful chemical energy derived from the
breakdown of lipids and carbohydrates
⫸ How many layers does the mitochondria have Answer: Two
1) Inner
- strictly regulates types of molecules that can pass through
2) Outer
Smoother, small molecules can pass through
⫸ How did the mitochondria originate Answer: when a bacteria cell
was consumed
⫸ What is the Nucleus Answer: - the largest orgenelle
- contains DNA and RNA and proteins
⫸ What does all cellular life have in common Answer: 1) Cell
Membrane
2) Regulates the flow of nutrients and waste
3) contains DNA
4) Several varieties of RNA
5) Proteins make and use most proteins and enzymes
6) Composed of the same basic Chemicals
, 7) Reproduce
8) require a supply of energy
⫸ List the cell sizes from smallest to largest Answer: viruses
bacteria
yeast
animal cells
multi-cellular organisms
⫸ What are the three different shapes of cells Answer: Rod-like ->
bacillus
Spherical -> coccus
Spiral -> spirillum
⫸ What are the conditions for cellular life Answer: - temperature
- PH
- Water
- Salt
- Oxygen availability
- Nutrient availability
⫸ What are the three temperatures Answer: Psychropiles -> grow
best below 20C
Mesophiles -> grows best between 20-50C
