Scheda di esercizi di Biologia per i test di ammissione a infermieristica con soluzioni

What is a scientific law?

1. AA guess about the cause of something that has not yet been tested
2. BAn explanation that has been proven wrong
3. CA rule that scientists vote to accept
4. DA statement of what always happens under certain conditions

What is the pH of pure water at 25 °C?

1. A7
2. B1
3. C0
4. D14

What is a mutagen?

1. AA protein that repairs damaged DNA
2. BSomething that can cause changes in DNA
3. CA cell that divides without control
4. DAn enzyme that copies DNA

Which kind of mutation can be passed on to a person's children?

1. AA mutation in a white blood cell during infection
2. BA mutation in a liver cell caused by alcohol
3. CA mutation in a skin cell caused by sunlight
4. DA mutation in a cell that forms eggs or sperm

Quando viene copiato il DNA nel ciclo cellulare?

1. ADurante la metafase della mitosi
2. BSolo durante la meiosi II
3. CDurante la citocinesi
4. DNella fase S dell'interfase

Che cosa dà al reticolo endoplasmatico rugoso il suo aspetto «rugoso»?

1. ALe gocce di grasso accumulate sulla sua superficie
2. BI ribosomi attaccati alla sua superficie
3. CI lisosomi fusi sul suo lato esterno
4. DI cloroplasti all'interno delle sue membrane

An inhibitor binds to an enzyme away from the active site and changes the enzyme's shape. Adding more substrate does not restore the rate. What type of inhibition is this?

1. ACompetitive inhibition
2. BNoncompetitive inhibition
3. CSubstrate saturation
4. DDenaturation by heat

Finches on the Galápagos Islands have different beak shapes on islands with different foods. What is the best explanation?

1. AThe birds were all created with the same beak and it never changed
2. BNatural selection favoured beaks suited to each food source
3. CThe beaks changed because the birds chose to eat new food
4. DEach bird changed its beak by using it more