NATS 1670 EXAM BUNDLE 2026 COMPLETE
QUESTIONS WITH ALL CORRECT ANSWERS
⩥ ALL cellular life has the following characteristics in common:
Answer: DNA as its genetic material
Several RNAs
PROTEINS
ENZYMES
CELL MEMBRANE
REPRODUCTION
ENERGY (ATP)
⩥ Eukaryote Answer: organisms whose cells contain a nucleus and other
membrane-bound organelles
⩥ Prokaryote Answer: organisms whose cells lack a nucleus and other
organelles
⩥ grow best below 20 degrees : Answer: psychrophiles
⩥ Grow best between 20-50 degrees Answer: mesophiles
,⩥ Grows best above 50 degrees Answer: thermophiles
⩥ Grows over 100c: Answer: hyperthermophiles
⩥ PH Answer: acidic or basic environments
⩥ Grows well at ph of 1 to 2 (acidic) Answer: Acidophiles
⩥ helicobacter is a cause Answer: peptic ulcer and could cause gastric
cancer
⩥ Grows best near neutral ph Answer: Neutrophile
⩥ Grows best at basic ph Answer: Alkaliphile
⩥ water Answer: * Most cells require minimum moisture content
* Some bacteria can form cells that are able to survive with the absence
of water
⩥ Salt Answer: Most require moderate levels of salt
* Some exist in very high concentrations of salt : Halophiles
, ⩥ Aerobic cells Answer: require oxygen for growth
⩥ Anaerobic Answer: require lack of oxygen for growth
⩥ Nutrient availability Answer: most microorganisms require organic
and inorganic nutrients to grow and live
⩥ Cyanobacteria Answer: * grow in the absence of nutrients
cyanobacteria and photosynthetic bacteria have membrane structures
that enable them to perform photosynthesis.
⩥ 4.6B years ago Answer: earth formation begins
⩥ 4.3B years ago Answer: first water?
⩥ 3.8B years ago Answer: first evidence of life?
⩥ Archaea Answer: constitute a domain of single-celled organisms.
These microorganisms lack cell nuclei and are therefore prokaryotes
Most archaea live in extreme environments (e.g. hot springs)
Thermoacidophiles (e.g. hot springs)
QUESTIONS WITH ALL CORRECT ANSWERS
⩥ ALL cellular life has the following characteristics in common:
Answer: DNA as its genetic material
Several RNAs
PROTEINS
ENZYMES
CELL MEMBRANE
REPRODUCTION
ENERGY (ATP)
⩥ Eukaryote Answer: organisms whose cells contain a nucleus and other
membrane-bound organelles
⩥ Prokaryote Answer: organisms whose cells lack a nucleus and other
organelles
⩥ grow best below 20 degrees : Answer: psychrophiles
⩥ Grow best between 20-50 degrees Answer: mesophiles
,⩥ Grows best above 50 degrees Answer: thermophiles
⩥ Grows over 100c: Answer: hyperthermophiles
⩥ PH Answer: acidic or basic environments
⩥ Grows well at ph of 1 to 2 (acidic) Answer: Acidophiles
⩥ helicobacter is a cause Answer: peptic ulcer and could cause gastric
cancer
⩥ Grows best near neutral ph Answer: Neutrophile
⩥ Grows best at basic ph Answer: Alkaliphile
⩥ water Answer: * Most cells require minimum moisture content
* Some bacteria can form cells that are able to survive with the absence
of water
⩥ Salt Answer: Most require moderate levels of salt
* Some exist in very high concentrations of salt : Halophiles
, ⩥ Aerobic cells Answer: require oxygen for growth
⩥ Anaerobic Answer: require lack of oxygen for growth
⩥ Nutrient availability Answer: most microorganisms require organic
and inorganic nutrients to grow and live
⩥ Cyanobacteria Answer: * grow in the absence of nutrients
cyanobacteria and photosynthetic bacteria have membrane structures
that enable them to perform photosynthesis.
⩥ 4.6B years ago Answer: earth formation begins
⩥ 4.3B years ago Answer: first water?
⩥ 3.8B years ago Answer: first evidence of life?
⩥ Archaea Answer: constitute a domain of single-celled organisms.
These microorganisms lack cell nuclei and are therefore prokaryotes
Most archaea live in extreme environments (e.g. hot springs)
Thermoacidophiles (e.g. hot springs)
