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

Che cosa non hanno le cellule procariotiche, come i batteri?

1. AUn nucleo delimitato da membrana
2. BRibosomi
3. CMateriale genetico sotto forma di DNA
4. DUna membrana cellulare

Quanti cromosomi ha una tipica cellula somatica umana?

1. A46
2. B92
3. C44
4. D23

What is an antigen?

1. AA drug that kills viruses
2. BA protein that carries oxygen
3. CA white blood cell that engulfs and digests bacteria
4. DA molecule that the immune system sees as foreign

Which of these is part of the body's innate (non-specific) defence?

1. AThe skin and stomach acid
2. BAntibodies made after vaccination
3. CT cells that recognise one virus
4. DMemory B cells from an earlier infection

Which body system works with the respiratory system to deliver oxygen to body cells?

1. AThe skeletal system
2. BThe urinary system
3. CThe digestive system
4. DThe circulatory system

In che cosa la diffusione facilitata differisce dalla diffusione semplice?

1. ASposta solo gas come l'ossigeno
2. BUsa ATP per spostare le molecole in salita
3. CSposta le molecole contro il loro gradiente usando una pompa e ATP
4. DUsa proteine canale o trasportatrici ma non ATP

A leaf with green and white areas is kept in light and then tested with iodine. Only the green areas turn blue-black. What does this show?

1. AIodine destroys chlorophyll in the leaf
2. BChlorophyll is needed for photosynthesis
3. CWhite areas store more starch than green areas
4. DLight is not needed for photosynthesis

Home pregnancy tests use antibodies that bind the hormone hCG. Why do they react with hCG and not with other proteins in urine?

1. AEach antibody binds a specific antigen shape
2. BUrine contains no other proteins at all
3. CAntibodies bind every protein but change colour only with hCG
4. DThe hormone hCG is a type of antibody itself