Extreme Life & Survival Strategies

Question 1

What is the suspended metabolic state that allows tardigrades to survive extreme conditions?

Accepted Answer

Cryptobiosis

Answer

Hibernation

Answer

Estivation

Answer

Dormancy

Question 2

What percentage of its original body weight can a tardigrade lose during anhydrobiosis?

Accepted Answer

97%

Answer

30%

Answer

60%

Answer

99.5%

Question 3

Which hyperthermophilic archaea is named after the Greek god of fire?

Accepted Answer

Pyrococcus

Answer

Methanopyrus kandleri

Answer

Thermococcus atlanticus

Answer

Thermobacterium

Question 4

What chemical-harvesting process do extremophiles use at hydrothermal vents to obtain energy?

Accepted Answer

Chemosynthesis

Answer

Photosynthesis

Answer

Fermentation

Answer

Glycolysis

Question 5

What is the minimum size requirement for tumors to need a blood supply for growth?

Accepted Answer

1-2 mm³

Answer

0.1 mm³

Answer

10 mm³

Answer

100 mm³

Question 6

How many known species of Hymenoptera (wasps) use venom for paralysis rather than death?

Accepted Answer

Hundreds of thousands

Answer

Thousands

Answer

Millions

Answer

Over 100,000

Question 7

What enzyme complex in mitochondria produces the majority of ATP through oxidative phosphorylation?

Accepted Answer

ATP synthase

Answer

Cytochrome c oxidase (Complex IV)

Answer

Krebs cycle enzymes

Answer

Pyruvate dehydrogenase

Question 8

What evolutionary pressure led birds to lose teeth and develop beaks over millions of years?

Accepted Answer

Reduction in jaw weight for flight

Answer

Predator avoidance

Answer

Temperature regulation

Answer

Dietary specialization

Question 9

What protein structure in bacterial flagella enables rotation at thousands of revolutions per minute?

Accepted Answer

Flagellar motor protein

Answer

ATP synthase

Answer

Myosin

Answer

Kinesin

Question 10

What is the major structural difference between bacterial and eukaryotic ribosomes?

Accepted Answer

Bacterial ribosomes are 70S; eukaryotic are 80S

Answer

Bacterial ribosomes have 40S and 60S subunits

Answer

Bacterial ribosomes use DNA; eukaryotic use RNA

Answer

Bacterial ribosomes lack RNA components

Extreme Life & Survival Strategies

What is the suspended metabolic state that allows tardigrades to survive extreme conditions?

Publisher

Extreme Life & Survival Strategies